64/128 Mbit Single Operation Voltage

IS25LP256
IS25WP256
256MBIT
SERIAL FLASH MEMORY WITH 166MHZ MULTI I/O SPI & QUAD
I/O QPI DTR INTERFACE
ADVANCED DATA SHEET
IS25LP256, IS25WP256
256MBIT
SERIAL FLASH MEMORY WITH 166MHZ MULTI I/O SPI &
QUAD I/O QPI DTR INTERFACE
ADVANCED INFORMATION
FEATURES
• Industry Standard Serial Interface
- IS25LP256: 256Mbit/32Mbyte
- IS25WP256: 256Mbit/32Mbyte
- 3 or 4 Byte Addressing Mode
- Supports Standard SPI, Fast, Dual, Dual
I/O, Quad, Quad I/O, SPI DTR, Dual I/O
DTR, Quad I/O DTR, and QPI
- Software & Hardware Reset
- Supports Serial Flash Discoverable
Parameters (SFDP)
• High Performance Serial Flash (SPI)
- 80MHz Normal Read
- Up to166Mhz Fast Read
- Up to 80MHz DTR (Dual Transfer Rate)
- Equivalent Throughput of 664 Mb/s
- Selectable Dummy Cycles
- Configurable Drive Strength
- Supports SPI Modes 0 and 3
- More than 100,000 Erase/Program Cycles
- More than 20-year Data Retention
• Flexible & Efficient Memory Architecture
- Chip Erase with Uniform Sector/Block
Erase (4/32/64 Kbyte)
- Program 1 to 256 Byte per Page
- Program/Erase Suspend & Resume
• Efficient Read and Program modes
- Low Instruction Overhead Operations
- Continuous Read 8/16/32/64 Byte Burst
- Selectable Burst Length
- QPI for Reduced Instruction Overhead
- AutoBoot Operation
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Rev.00A
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• Low Power with Wide Temp. Ranges
- Single Voltage Supply
IS25LP: 2.30V to 3.60V
IS25WP: 1.65V to 1.95V
- 10 mA Active Read Current
- 8 µA Standby Current
- 1 µA Deep Power Down
- Temp Grades:
Extended: -40°C to +105°C
Extended+: -40°C to +125°C
Auto Grade: up to +125°C
Note: Extended+ should not be used for Automotive.
• Advanced Security Protection
- Software and Hardware Write Protection
- Advanced Sector/Block Protection
- Top/Bottom Block protection
- Power Supply Lock Protection
- 4x256 Byte Dedicated Security Area
with OTP User-lockable Bits
- 128 bit Unique ID for Each Device
(Call Factory)
• Industry Standard Pin-out & Packages
- M =16-pin SOIC 300mil
- L = 8-contact WSON 8x6mm
- G = 24-ball TFBGA 6x8mm (4x6 ball array)(1)
- H = 24-ball TFBGA 6x8mm (5x5 ball array)(1)
- KGD (Call Factory)
Note: For the additional RESET# pin option, call Factory
2
IS25LP256, IS25WP256
GENERAL DESCRIPTION
The IS25LP256 and IS25WP256 Serial Flash memory offers a versatile storage solution with high flexibility and
performance in a simplified pin count package. ISSI’s “Industry Standard Serial Interface” Flash is for systems
that require limited space, a low pin count, and low power consumption. The device is accessed through a 4wire SPI Interface consisting of a Serial Data Input (SI), Serial Data Output (SO), Serial Clock (SCK), and Chip
Enable (CE#) pins, which can also be configured to serve as multi-I/O (see pin descriptions).
The device supports Dual and Quad I/O as well as standard, Dual Output, and Quad Output SPI. Clock
frequencies of up to 166MHz allow for equivalent clock rates of up to 664MHz (166MHz x 4) which equates to
83Mbytes/s of data throughput. The IS25xP series of Flash adds support for DTR (Double Transfer Rate)
commands that transfer addresses and read data on both edges of the clock. These transfer rates can
outperform 16-bit Parallel Flash memories allowing for efficient memory access to support XIP (execute in
place) operation.
The memory array is organized into programmable pages of 256 bytes. This family supports page program
mode where 1 to 256 bytes of data are programmed in a single command. QPI (Quad Peripheral Interface)
supports 2-cycle instruction further reducing instruction times. Pages can be erased in groups of 4Kbyte
sectors, 32Kbyte blocks, 64Kbyte blocks, and/or the entire chip. The uniform sector and block architecture
allows for a high degree of flexibility so that the device can be utilized for a broad variety of applications
requiring solid data retention.
GLOSSARY
Standard SPI
In this operation, a 4-wire SPI Interface is utilized, consisting of Serial Data Input (SI), Serial Data Output (SO),
Serial Clock (SCK), and Chip Enable (CE#) pins. Instructions are sent via the SI pin to encode instructions,
addresses, or input data to the device on the rising edge of SCK. The SO pin is used to read data or to check
the status of the device. This device supports SPI bus operation modes (0,0) and (1,1).
Mutil I/O SPI
Multi-I/O operation utilizes an enhanced SPI protocol to allow the device to function with Dual Output, Dual Input
and Output, Quad Output, and Quad Input and Output capability. Executing these instructions through SPI
mode will achieve double or quadruple the transfer bandwidth for READ and PROGRAM operations.
Quad I/O QPI
The device enables QPI protocol by issuing an “Enter QPI mode (35h)” command. The QPI mode uses four IO
pins for input and output to decrease SPI instruction overhead and increase output bandwidth. SI and SO pins
become bidirectional IO0 and IO1, and WP# and HOLD# pins become IO2 and IO3 respectively during QPI
mode. Issuing an “Exit QPI (F5h) command will cause the device to exit QPI mode. Power Reset or
Hardware/Software Reset can also return the device into the standard SPI mode.
DTR
In addition to SPI and QPI features, the device also supports SPI DTR READ. SPI DTR allows high data
throughput while running at lower clock frequencies. SPI DTR READ mode uses both rising and falling edges of
the clock to drive output, resulting in reducing input and output cycles by half.
Programmable drive strength and Selectable burst setting.
The device offers programmable output drive strength and selectable burst (wrap) length features to increase
the efficiency and performance of READ operation. The driver strength and burst setting features are controlled
by setting the Read Registers. A total of six different drive strengths and four different burst sizes (8/16/32/64
Byte) are available for selection.
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IS25LP256, IS25WP256
TABLE OF CONTENTS
FEATURES .......................................................................................................................................................... 2
GENERAL DESCRIPTION .................................................................................................................................. 3
TABLE OF CONTENTS ....................................................................................................................................... 4
1.
PIN CONFIGURATION ................................................................................................................................. 7
2.
PIN DESCRIPTIONS .................................................................................................................................... 9
3.
BLOCK DIAGRAM ...................................................................................................................................... 11
4.
SPI MODES DESCRIPTION ...................................................................................................................... 12
5.
SYSTEM CONFIGURATION ...................................................................................................................... 14
5.1 BLOCK/SECTOR ADDRESSES .......................................................................................................... 14
6.
REGISTERS ............................................................................................................................................... 15
6.1 STATUS REGISTER ............................................................................................................................ 15
6.2 FUNCTION REGISTER ........................................................................................................................ 18
6.3 READ REGISTER AND EXTENDED REGISTER ................................................................................ 19
6.3.1 READ REGISTER ........................................................................................................................ 19
6.3.2 EXTENDED READ REGISTER .................................................................................................... 21
6.4 AUTOBOOT REGISTER ...................................................................................................................... 23
6.5 BANK ADDRESS REGISTER .............................................................................................................. 23
6.6 ADVANCED SECTOR/BLOCK PROTECTION (ASP) RELATED REGISTER .................................... 24
6.6.1 ADVANCED SECTOR/BLOCK PROTECTION REGISTER (ASPR) ........................................... 24
6.6.2 PASSWORD REGISTER ............................................................................................................. 25
6.6.3 PPB LOCK REGISTER ................................................................................................................ 25
6.6.4 PPB REGISTER ........................................................................................................................... 26
6.6.5 DYB REGISTER ........................................................................................................................... 26
7.
PROTECTION MODE................................................................................................................................. 27
7.1 HARDWARE WRITE PROTECTION.................................................................................................... 27
7.2 SOFTWARE WRITE PROTECTION .................................................................................................... 27
7.2.1 BLOCK PROTECTION BITS ........................................................................................................ 27
7.2.2 ADVANCED SECTOR/BLOCK PROTECTION (ASP) ................................................................. 28
8.
DEVICE OPERATION ................................................................................................................................ 35
8.1 COMMAND OVERVIEW ...................................................................................................................... 35
8.2 COMMAND SET SUMMARY ............................................................................................................... 36
8.3 NORMAL READ OPERATION (NORD, 03h or 4NORD, 13h) ............................................................. 45
8.4 FAST READ OPERATION (FRD, 0Bh or 4FRD, 0Ch) ......................................................................... 48
8.5 HOLD OPERATION .............................................................................................................................. 52
8.6 FAST READ DUAL I/O OPERATION (FRDIO, BBh or 4FRDIO, BCh) ................................................ 53
8.7 FAST READ DUAL OUTPUT OPERATION (FRDO, 3Bh or 4FRDO, 3Ch)......................................... 57
8.8 FAST READ QUAD OUTPUT OPERATION (FRQO, 6Bh or 4FRQO 6Ch) ........................................ 60
8.9 FAST READ QUAD I/O OPERATION (FRQIO, EBh or 4FRQIO, ECh) ............................................... 63
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IS25LP256, IS25WP256
8.10 PAGE PROGRAM OPERATION (PP, 02h or 4PP, 12h).................................................................... 70
8.11 QUAD INPUT PAGE PROGRAM OPERATION (PPQ, 32h/38h or 4PPQ, 34h/3Eh) ........................ 73
8.12 ERASE OPERATION ......................................................................................................................... 74
8.13 SECTOR ERASE OPERATION (SER, D7h/20h or 4SER, 21h) ........................................................ 75
8.14 BLOCK ERASE OPERATION (BER32K:52h or 4BER32K:5Ch, BER64K:D8h or 4BER64K:DCh) .. 77
8.15 CHIP ERASE OPERATION (CER, C7h/60h) ..................................................................................... 80
8.16 WRITE ENABLE OPERATION (WREN, 06h) .................................................................................... 81
8.17 WRITE DISABLE OPERATION (WRDI, 04h) ..................................................................................... 82
8.18 READ STATUS REGISTER OPERATION (RDSR, 05h) ................................................................... 83
8.19 WRITE STATUS REGISTER OPERATION (WRSR, 01h) ................................................................. 84
8.20 READ FUNCTION REGISTER OPERATION (RDFR, 48h) ............................................................... 85
8.21 WRITE FUNCTION REGISTER OPERATION (WRFR, 42h)............................................................. 86
8.22 ENTER QUAD PERIPHERAL INTERFACE (QPI) MODE OPERATION (QIOEN,35h; QIODI,F5h) . 87
8.23 PROGRAM/ERASE SUSPEND & RESUME ...................................................................................... 88
8.24 ENTER DEEP POWER DOWN (DP, B9h) ......................................................................................... 91
8.25 RELEASE DEEP POWER DOWN (RDPD, ABh) ............................................................................... 92
8.26 SET READ PARAMETERS OPERATION (SRPNV: 65h, SRPV: C0h/63h) ...................................... 93
8.27 SET EXTENDED READ PARAMETERS OPERATION (SERPNV: 85h, SERPV: 83h) .................... 95
8.28 READ READ PARAMETERS OPERATION (RDRP, 61h) ................................................................. 96
8.29 READ EXTENDED READ PARAMETERS OPERATION (RDERP, 81h) .......................................... 97
8.30 CLEAR EXTENDED READ REGISTER OPERATION (CLERP, 82h) ............................................... 98
8.31 READ PRODUCT IDENTIFICATION (RDID, ABh) ............................................................................ 99
8.32 READ PRODUCT IDENTIFICATION BY JEDEC ID OPERATION (RDJDID, 9Fh; RDJDIDQ, AFh)
.................................................................................................................................................................. 101
8.33 READ DEVICE MANUFACTURER AND DEVICE ID OPERATION (RDMDID, 90h) ...................... 102
8.34 READ UNIQUE ID NUMBER (RDUID, 4Bh) .................................................................................... 103
8.35 READ SFDP OPERATION (RDSFDP, 5Ah) .................................................................................... 104
8.36 NO OPERATION (NOP, 00h) ........................................................................................................... 104
8.37 SOFTWARE RESET (RESET-ENABLE (RSTEN, 66h) AND RESET (RST, 99h)) AND HARDWARE
RESET ...................................................................................................................................................... 105
8.38 SECURITY INFORMATION ROW .................................................................................................... 106
8.39 INFORMATION ROW ERASE OPERATION (IRER, 64h) ............................................................... 107
8.40 INFORMATION ROW PROGRAM OPERATION (IRP, 62h) ........................................................... 108
8.41 INFORMATION ROW READ OPERATION (IRRD, 68h) ................................................................. 109
8.42 FAST READ DTR MODE OPERATION (FRDTR, 0Dh or 4FRDTR, 0Eh) ....................................... 110
8.43 FAST READ DUAL IO DTR MODE OPERATION (FRDDTR, BDh or 4FRDDTR, BEh) ................. 115
8.44 FAST READ QUAD IO DTR MODE OPERATION (FRQDTR, EDh or 4FRQDTR, EEh) ................ 119
8.45 SECTOR LOCK/UNLOCK FUNCTIONS .......................................................................................... 127
8.46 AUTOBOOT ...................................................................................................................................... 130
8.47 READ BANK ADDRESS REGISTER OPERATION (RDBR: 16h/C8h) ........................................... 134
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IS25LP256, IS25WP256
8.48 WRITE BANK ADDRESS REGISTER OPERATION (WRBRNV: 18h, WRBRV: 17h/C5h) ............ 135
8.49 ENTER 4-BYTE ADDRESS MODE OPERATION (EN4B, B7h) ...................................................... 136
8.50 EXIT 4-BYTE ADDRESS MODE OPERATION (EX4B, 29h) ........................................................... 137
8.51 READ DYB OPERATION (RDDYB, FAh or 4RDDYB, E0h) ............................................................ 138
8.52 WRITE DYB OPERATION (WRDYB, FBh or 4WRDYB, E1h) ......................................................... 140
8.53 READ PPB OPERATION (RDPPB, FCh or 4RDPPB, E2h) ............................................................ 142
8.54 PROGRAM PPB OPERATION (PGPPB, FDh or 4PGPPB, E3h) .................................................... 143
8.55 ERASE PPB OPERATION (ERPPB, E4h) ....................................................................................... 145
8.56 READ ASP OPERATION (RDASP, 2Bh) ......................................................................................... 146
8.57 PROGRAM ASP OPERATION (PGASP, 2Fh) ................................................................................. 147
8.58 READ PPB LOCK BIT OPERATION (RDPLB, A7h) ........................................................................ 148
8.59 WRITE PPB LOCK BIT OPERATION (WRPLB, A6h)...................................................................... 149
8.60 SET FREEZE BIT OPERATION (SFRZ, 91h) .................................................................................. 150
8.61 READ PASSWORD OPERATION (RDPWD, E7h) .......................................................................... 151
8.62 PROGRAM PASSWORD OPERATION (PGPWD, E8h) ................................................................. 152
8.63 UNLOCK PASSWORD OPERATION (UNPWD, E9h) ..................................................................... 153
8.64 GANG SECTOR/BLOCK LOCK OPERATION (GBLK, 7Eh) ........................................................... 154
8.65 GANG SECTOR/BLOCK UNLOCK OPERATION (GBUN, 98h) ...................................................... 155
9.
ELECTRICAL CHARACTERISTICS......................................................................................................... 156
9.1 ABSOLUTE MAXIMUM RATINGS
(1)
................................................................................................. 156
9.2 OPERATING RANGE ......................................................................................................................... 156
9.3 DC CHARACTERISTICS .................................................................................................................... 157
9.4 AC MEASUREMENT CONDITIONS .................................................................................................. 158
9.5 AC CHARACTERISTICS .................................................................................................................... 159
9.6 SERIAL INPUT/OUTPUT TIMING ...................................................................................................... 161
9.7 POWER-UP AND POWER-DOWN .................................................................................................... 163
9.8 PROGRAM/ERASE PERFORMANCE ............................................................................................... 164
9.9 RELIABILITY CHARACTERISTICS ................................................................................................... 164
10.
PACKAGE TYPE INFORMATION ....................................................................................................... 165
10.1 8-CONTACT ULTRA-THIN SMALL OUTLINE NO-LEAD (WSON) PACKAGE 8x6mm (L)............. 165
10.2 16-LEAD PLASTIC SMALL OUTLINE PACKAGE (300 MILS BODY WIDTH) (M) .......................... 166
10.3 24-BALL THIN PROFILE FINE PITCH BGA 6x8mm 4x6 BALL ARRAY (G) ................................... 167
10.4 24- BALL THIN PROFILE FINE PITCH BGA 6x8mm 5x5 BALL ARRAY (H) .................................. 168
11.
ORDERING INFORMATION – Valid Part Numbers ............................................................................ 169
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Rev.00A
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IS25LP256, IS25WP256
1. PIN CONFIGURATION
HOLD# (IO3)
HOLD# or RESET# (IO3)
(2)
1
16
SCK
2
15
SI (IO0)
RESET#/NC
3
14
NC
NC
4
13
NC
Vcc
(3)
NC
5
12
NC
NC
6
11
NC
CE#
7
10
GND
SO (IO1)
8
9
16-pin SOIC 300mil
8 Vcc
CE# 1
HOLD# or
SO (IO1)
2
7 RESET# (IO3)(1)
WP# (IO2)
3
6 SCK
GND
4
5 SI (IO0)
WP# (IO2)
8-contact WSON 8x6mm
Notes:
1. According to the P7 bit setting in Read Register, either HOLD# (P7=0) or RESET# (P7=1) pin can be selected.
2. For the dedicated parts that don’t have the additional RESET# pin on pin3, either HOLD# or RESET# pin can be
selected on pin1 by the P7 bit setting in Read Register when QE=0. For the dedicated parts with additional
RESET# pin on pin3, only HOLD# pin is selected for pin1 regardless of the P7 bit of Read Register when QE=0.
3. The dedicated parts have additional RESET# pin (pin3) on 16-pin SOIC 300mil package. For the parts, Function
Register Bit0 (RESET# Enable/Disable) will be set to “0”. The RESET# pin is independent of the P7 bit of Read
Register and QE bit of Status Register. The RESET# pin has an internal pull-up resistor and may be left floating if
not used. See the Ordering Information for the additional RESET# pin option.
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IS25LP256, IS25WP256
Top View, Balls Facing Down
A1
A2
A3
NC
NC
RESET#
(NC)
Top View, Balls Facing Down
A4
(2)
NC
B1
B2
B3
B4
NC
SCK
GND
VCC
C1
C2
C3
C4
NC
CE#
NC
WP#(IO2)
D1
D2
D3
D4
SO(IO1)
SI(IO0)
HOLD# or
RESET# (IO3)
(1)
E1
E2
E3
E4
NC
NC
NC
F1
F2
F3
F4
NC
NC
NC
NC
A3
A4
NC
RESET#
(NC)
A5
(2)
NC
NC
A2
NC
NC
B1
B2
B3
B4
B5
NC
SCK
GND
VCC
NC
C1
C2
C3
C4
C5
NC
CE#
NC
WP#(IO2)
NC
D1
D2
D3
D4
NC
SO(IO1)
SI(IO0)
HOLD# or
RESET# (IO3)
D5
(1)
NC
E1
E2
E3
E4
E5
NC
NC
NC
NC
NC
5x5 Ball Array
4x6 Ball Array
24-ball TFBGA 6x8mm
Notes:
1. For the dedicated parts that don’t have the additional RESET# pin, either HOLD# (P7=0) or RESET# (P7=1) pin
can be selected on ball D4 by the P7 bit setting in Read Register when QE=0. For the dedicated parts with the
additional RESET# pin on ball A3 (4x6 ball array) or A4 (5x5 ball array), only HOLD# pin is selected for ball D4
regardless of the P7 bit of Read Register when QE=0.
2. The dedicated parts have the additional RESET# pin on 24-ball TFBGA 6x8mm package. For the parts, Function
Register Bit0 (RESET# Enable/Disable) will be set to “0”. The RESET# pin is independent of the P7 bit of Read
Register and QE bit of Status Register. The RESET# pin has an internal pull-up resistor and may be left floating if
not used. Call Factory for the additional RESET# pin option.
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IS25LP256, IS25WP256
2. PIN DESCRIPTIONS
For all other packages except the package with additional RESET# pin option
SYMBOL
TYPE
DESCRIPTION
Chip Enable: The Chip Enable (CE#) pin enables and disables the devices
operation. When CE# is high the device is deselected and output pins are in a high
impedance state. When deselected the devices non-critical internal circuitry power
down to allow minimal levels of power consumption while in a standby state.
CE#
INPUT
When CE# is pulled low the device will be selected and brought out of standby
mode. The device is considered active and instructions can be written to, data read,
and written to the device. After power-up, CE# must transition from high to low
before a new instruction will be accepted.
Keeping CE# in a high state deselects the device and switches it into its low power
state. Data will not be accepted when CE# is high.
SI (IO0),
SO (IO1)
INPUT/
OUTPUT
Serial Data Input, Serial Output, and IOs (SI, SO, IO0, and IO1):
This device supports standard SPI, Dual SPI, and Quad SPI operation. Standard SPI
instructions use the unidirectional SI (Serial Input) pin to write instructions,
addresses, or data to the device on the rising edge of the Serial Clock (SCK).
Standard SPI also uses the unidirectional SO (Serial Output) to read data or status
from the device on the falling edge of the serial clock (SCK).
In Dual and Quad SPI mode, SI and SO become bidirectional IO pins to write
instructions, addresses or data to the device on the rising edge of the Serial Clock
(SCK) and read data or status from the device on the falling edge of SCK. Quad SPI
instructions use the WP# and HOLD# pins as IO2 and IO3 respectively.
WP# (IO2)
INPUT/
OUTPUT
Write Protect/Serial Data IO (IO2): The WP# pin protects the Status Register from
being written in conjunction with the SRWD bit. When the SRWD is set to “1” and the
WP# is pulled low, the Status Register bits (SRWD, QE, BP3, BP2, BP1, BP0) are
write-protected and vice-versa for WP# high. When the SRWD is set to “0”, the
Status Register is not write-protected regardless of WP# state.
When the QE bit is set to “1”, the WP# pin (Write Protect) function is not available
since this pin is used for IO2.
HOLD# or RESET#/Serial Data IO (IO3): When the QE bit of Status Register is set
to “1”, HOLD# pin or RESET# is not available since it becomes IO3. When QE=0 the
pin acts as HOLD# or RESET# and either one can be selected by the P7 bit setting
in Read Register. HOLD# will be selected if P7=0 (Default) and RESET# will be
selected if P7=1.
HOLD# or
RESET# (IO3)
INPUT/
OUTPUT
The HOLD# pin allows the device to be paused while it is selected. It pauses serial
communication by the master device without resetting the serial sequence. The
HOLD# pin is active low. When HOLD# is in a low state and CE# is low, the SO pin
will be at high impedance. Device operation can resume when HOLD# pin is brought
to a high state.
RESET# pin is a hardware RESET signal. When RESET# is driven HIGH, the
memory is in the normal operating mode. When RESET# is driven LOW, the memory
enters reset mode and output is High-Z. If RESET# is driven LOW while an internal
WRITE, PROGRAM, or ERASE operation is in progress, data may be lost.
SCK
INPUT
Vcc
POWER
GND
GROUND
NC
Unused
Serial Data Clock: Synchronized Clock for input and output timing operations.
Power: Device Core Power Supply
Ground: Connect to ground when referenced to Vcc
NC: Pins labeled “NC” stand for “No Connect” and should be left uncommitted.
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IS25LP256, IS25WP256
For the package with additional RESET# pin option
- RESET# pin will be added to another pin without sharing with HOLD# pin (Call Factory for 24-ball TFBGA
6x8mm packages)
SYMBOL
TYPE
DESCRIPTION
CE#
INPUT
Same as the description in previous page
SI (IO0),
SO (IO1)
INPUT/
OUTPUT
Same as the description in previous page
WP# (IO2)
INPUT/
OUTPUT
Same as the description in previous page
HOLD#/Serial Data IO (IO3): When the QE bit of Status Register is set to “1”,
HOLD# pin is not available since it becomes IO3. When QE=0 the pin acts as
HOLD# regardless of the P7 bit of Read Register.
HOLD# (IO3)
INPUT/
OUTPUT
The HOLD# pin allows the device to be paused while it is selected. It pauses serial
communication by the master device without resetting the serial sequence. The
HOLD# pin is active low. When HOLD# is in a low state and CE# is low, the SO pin
will be at high impedance. Device operation can resume when HOLD# pin is brought
to a high state.
RESET#: This pin is available only for dedicated parts (Call Factory for 24-ball
TFBGA 6x8mm packages).
RESET#
INPUT
The RESET# pin is a hardware RESET signal. When RESET# is driven HIGH, the
memory is in the normal operating mode. When RESET# is driven LOW, the
memory enters reset mode and output is High-Z. If RESET# is driven LOW while an
internal WRITE, PROGRAM, or ERASE operation is in progress, data may be lost.
SCK
INPUT
Same as the description in previous page
Vcc
POWER
Same as the description in previous page
GND
GROUND
Same as the description in previous page
NC
Unused
Same as the description in previous page
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IS25LP256, IS25WP256
3. BLOCK DIAGRAM
Control Logic
High Voltage Generator
Status
Register
I/O Buffers and
Data Latches
256 Bytes
Page Buffer
Serial Peripheral Interface
CE#
SCK
WP#
(IO2)
SI
(IO0)
SO
(IO1)
Y-Decoder
(1)
X-Decoder
HOLD# or RESET#
(IO3)
Memory Array
Address Latch &
Counter
Note1: RESET# pin can be added to another pin without sharing with HOLD# pin for the dedicated parts. Call
Factory for the additional RESET# pin option for 24-ball TFBGA 6x8mm packages.
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IS25LP256, IS25WP256
4. SPI MODES DESCRIPTION
Multiple IS25LP256 devices or multiple IS25WP256 devices can be connected on the SPI serial bus and
controlled by a SPI Master, i.e. microcontroller, as shown in Figure 4.1. The devices support either of two SPI
modes:
Mode 0 (0, 0)
Mode 3 (1, 1)
The difference between these two modes is the clock polarity. When the SPI master is in stand-by mode, the
serial clock remains at “0” (SCK = 0) for Mode 0 and the clock remains at “1” (SCK = 1) for Mode 3. Please refer
to Figure 4.2 and Figure 4.3 for SPI and QPI mode. In both modes, the input data is latched on the rising edge
of Serial Clock (SCK), and the output data is available from the falling edge of SCK.
Figure 4.1 Connection Diagram among SPI Master and SPI Slaves (Memory Devices)
SDO
SPI interface with
(0,0) or (1,1)
SDI
SCK
SCK SO
SI
SCK SO
SI
SCK SO
SI
SPI Master
(i.e. Microcontroller)
CS3
CS2
SPI
Memory
Device
CS1
SPI
Memory
Device
CE#
SPI
Memory
Device
CE#
WP# HOLD# or
RESET
(1)
CE#
WP# HOLD# or
RESET#
(1)
WP# HOLD# or
RESET#
(1)
Notes:
1. RESET# pin can be added to another pin without sharing with HOLD# pin for the dedicated parts. Call Factory for
the additional RESET# pin option for 24-ball TFBGA 6x8mm packages.
2. SI and SO pins become bidirectional IO0 and IO1, and WP# and HOLD# pins become IO2 and IO3 respectively
during QPI mode.
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IS25LP256, IS25WP256
Figure 4.2 SPI Mode Support
SCK
Mode 0 (0,0)
SCK
Mode 3 (1,1)
MSB
SI
SO
MSB
Figure 4.3 QPI Mode Support
CE #
Mode 3 0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
SCK
Mode 0
3-byte Address
Mode Bits
Data 1
Data 2
Data 3
IO0
C4
C0
20
16
12
8
4
0
4
0
4
0
4
0
4
0
...
IO1
C5
C1
21
17
13
9
5
1
5
1
5
1
5
1
5
1
...
IO2
C6
C2
22
18
14
10
6
2
6
2
6
2
6
2
6
2
...
IO3
C71
C3
23 1
19
15
11
7
3
71
3
71
3
71
3
71
3
...
Note1: MSB (Most Significant Bit)
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5. SYSTEM CONFIGURATION
The memory array is divided into uniform 4 Kbyte sectors or uniform 32/64 Kbyte blocks (a block consists of
eight/sixteen adjacent sectors respectively).
Table 5.1 illustrates the memory map of the device. The Status Register controls how the memory is protected.
5.1 BLOCK/SECTOR ADDRESSES
Table 5.1 Block/Sector Addresses of IS25LP256 and IS25WP256
Memory
Density
Block No.
(64Kbyte)
Block No.
(32Kbyte)
Block 0
Block 0
Block 1
Block 2
Block 1
Block 3
Block 4
Block 2
Block 5
:
:
Block 508
256Mb
Block 254
Block 509
Block 510
Block 255
Block 511
:
:
Block 1020
Block 510
Block 1021
Block 1022
Block 511
Block 1023
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Sector 0
:
:
Sector 15
Sector 16
:
:
Sector 31
Sector 32
:
:
Sector Size
(Kbyte)
4
:
:
4
4
:
:
4
4
:
:
000000h - 000FFFh
:
:
00F000h - 00FFFFh
010000h - 010FFFh
:
:
01F000h - 01FFFFh
020000h - 020FFFh
:
:
Sector 47
4
02F000h - 02FFFFh
Sector No.
Address Range
:
:
:
Sector 4064
:
:
Sector 4079
Sector 4080
:
:
Sector 4095
4
:
:
4
4
:
:
4
FE0000h – FE0FFFh
:
:
FEF000h – FEFFFFh
FF0000h – FF0FFFh
:
:
FFF000h – FFFFFFh
:
:
:
Sector 8160
:
:
Sector 8175
Sector 8176
:
:
Sector 8191
4
:
:
4
4
:
:
4
1FE0000h – 1FE0FFFh
:
:
1FEF000h – 1FEFFFFh
1FF0000h – 1FF0FFFh
:
:
1FFF000h – 1FFFFFFh
14
IS25LP256, IS25WP256
6. REGISTERS
The device has many sets of Registers such as Status, Function, Read, AutoBoot, and so on.
6.1 STATUS REGISTER
Status Register Format and Status Register Bit Definitions are described in Tables 6.1 & 6.2.
Table 6.1 Status Register Format
Default
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
SRWD
QE
BP3
BP2
BP1
BP0
WEL
WIP
0
0
0
0
0
0
0
0
Table 6.2 Status Register Bit Definition
Bit
Name
Bit 0
WIP
Bit 1
WEL
Bit 2
BP0
Bit 3
BP1
Bit 4
BP2
Bit 5
BP3
Bit 6
QE
Bit 7
SRWD
Definition
Write In Progress Bit:
"0" indicates the device is ready (default)
"1" indicates a write cycle is in progress and the device is busy
Write Enable Latch:
"0" indicates the device is not write enabled (default)
"1" indicates the device is write enabled
Block Protection Bit: (See Tables 6.4 for details)
"0" indicates the specific blocks are not write-protected (default)
"1" indicates the specific blocks are write-protected
Quad Enable bit:
“0” indicates the Quad output function disable (default)
“1” indicates the Quad output function enable
Status Register Write Disable: (See Table 7.1 for details)
"0" indicates the Status Register is not write-protected (default)
"1" indicates the Status Register is write-protected
Read/Write
Type
R
Volatile
R/W
1
Volatile
R/W
Non-Volatile
R/W
Non-Volatile
R/W
Non-Volatile
Note: WEL bit can be written by WREN and WRDI commands, but cannot by WRSR command.
The BP0, BP1, BP2, BP3, QE, and SRWD are non-volatile memory cells that can be written by a Write Status
Register (WRSR) instruction. The default value of the BP0, BP1, BP2, BP3, QE, and SRWD bits were set to “0”
at factory. The Status Register can be read by the Read Status Register (RDSR).
The function of Status Register bits are described as follows:
WIP bit: Write In Progress (WIP) is read-only, and can be used to detect the progress or completion of a
Program, Erase, Write/Set Non-Volatile/OTP Register, or Gang Sector/Block Lock/Unlock operation. WIP is set
to “1” (busy state) when the device is executing the operation. During this time the device will ignore further
instructions except for Read Status/Function/Extended Read Register and Software/Hardware Reset
instructions. In addition to the instructions, an Erase/Program Suspend instruction also can be executed during
a Program or Erase operation. When an operation has completed, WIP is cleared to “0” (ready state) whether
the operation is successful or not and the device is ready for further instructions.
WEL bit: Write Enable Latch (WEL) indicates the status of the internal write enable latch. When WEL is “0”, the
internal write enable latch is disabled and the Write operations described in Table 6.3 are inhibited. When WEL
is “1”, the Write operations are allowed. WEL is set by a Write Enable (WREN) instruction. Each Write NonVolatile Register, Program and Erase instruction must be preceded by a WREN instruction. The volatile register
related commands such as the Set Volatile Read Register, the Set Volatile Extended Read Register, the Write
Volatile Bank Address Register, and WRDYB don’t require to set WEL to “1". WEL can be reset by a Write
Disable (WRDI) instruction. It will automatically reset after the completion of any Write operation.
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Table 6.3 Instructions requiring WREN instruction ahead
Instructions must be preceded by the WREN instruction
Name
Hex Code
Operation
PP
02h
Serial Input Page Program (3-byte or 4-byte Address)
4PP
12h
Serial Input Page Program (4-byte Address)
PPQ
32h/38h
Quad Input Page Program (3-byte or 4-byte Address)
4PPQ
34h/3Eh
Quad Input Page Program (4-byte Address)
SER
D7h/20h
Sector Erase 4KB (3-byte or 4-byte Address)
4SER
21h
Sector Erase 4KB (4-byte Address)
BER32 (32KB)
52h
Block Erase 32KB (3-byte or 4-byte Address)
4BER32 (32KB)
5Ch
Block Erase 32KB (4-byte Address)
BER64 (64KB)
D8h
Block Erase 64KB (3-byte or 4-byte Address)
4BER64 (64KB)
DCh
Block Erase 64KB (4-byte Address)
CER
C7h/60h
Chip Erase
WRSR
01h
Write Status Register
WRFR
42h
Write Function Register
SRPNV
65h
Set Read Parameters (Non-Volatile)
SERPNV
85h
Set Extended Read Parameters (Non-Volatile)
IRER
64h
Erase Information Row
IRP
62h
Program Information Row
WRABR
15h
Write AutoBoot Register
WRBRNV
17h
Write Non-Volatile Bank Address Register
PGPPB
FDh
Write PPB (3-byte or 4-byte Address)
4PGPPB
E3h
Write PPB (4-byte Address)
ERPPB
E4h
Erase PPB
PGASP
2Fh
Program ASP
WRPLB
A6h
Write PPB Lock Bit
SFRZ
91h
Set FREEZE bit
PGPWD
E8h
Program Password
BP3, BP2, BP1, BP0 bits: The Block Protection (BP3, BP2, BP1 and BP0) bits are used to define the portion of
the memory area to be protected. Refer to Table 6.4 for the Block Write Protection (BP) bit settings. When a
defined combination of BP3, BP2, BP1 and BP0 bits are set, the corresponding memory area is protected. Any
program or erase operation to that area will be inhibited.
Note: A Chip Erase (CER) instruction will be ignored unless all the Block Protection Bits are “0”s.
SRWD bit: The Status Register Write Disable (SRWD) bit operates in conjunction with the Write Protection
(WP#) signal to provide a Hardware Protection Mode. When the SRWD is set to “0”, the Status Register is not
write-protected. When the SRWD is set to “1” and the WP# is pulled low (VIL), the bits of Status Register
(SRWD, QE, BP3, BP2, BP1, BP0) become read-only, and a WRSR instruction will be ignored. If the SRWD is
set to “1” and WP# is pulled high (VIH), the Status Register can be changed by a WRSR instruction.
QE bit: The Quad Enable (QE) is a non-volatile bit in the Status Register that allows quad operation. When the
QE bit is set to “0”, the pin WP# and HOLD#/RESET# are enabled. When the QE bit is set to “1”, the IO2 and
IO3 pins are enabled.
WARNING: The QE bit must be set to “0” if WP# or HOLD#/RESET# pin is tied directly to the power supply.
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Table 6.4 Block (64Kbyte) assignment by Block Write Protect (BP) Bits
Status Register Bits
Protected Memory Area
BP3
BP2
BP1
BP0
0
0
0
0
TBS(T/B selection) = 0, Top area
TBS(T/B selection) = 1, Bottom area
0 ( None)
0 ( None)
st
th
0
0
0
1
1 (1 block: 511 )
1 (1 block: 0 )
0
0
1
0
2 (2 blocks: 510 and 511 )
th
st
th
st
3 (4 blocks: 0 to 3 )
th
st
4 (8 blocks: 0 to 7 )
0
0
1
1
3 (4 blocks: 508 to 511 )
0
1
0
0
4 (8 blocks: 504 to 511 )
0
1
0
1
5 (16 blocks: 496 to 511 )
0
1
1
0
6 (32 blocks: 480 to 511 )
0
1
1
1
7 (64 blocks: 448 to 511 )
1
0
0
0
8 (128 blocks: 384 to 511 )
1
0
0
1
9 (256 blocks: 256 to 511 )
1
0
1
x
10-11 (512 blocks: 0 to 511 ) All blocks
1
1
x
x
st
2 (2 blocks: 0 and 1 )
th
th
rd
th
th
th
st
5 (16 blocks: 0 to 15 )
th
st
6 (32 blocks: 0 to 31 )
th
st
7 (64 blocks: 0 to 63 )
th
th
st
th
rd
th
st
8 (128 blocks: 0 to 127 )
th
st
9 (256 blocks: 0 to 255 )
th
st
th
st
12-15 (512 blocks: 0 to 511 ) All blocks
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th
th
th
th
th
th
st
th
st
10-11 (512 blocks: 0 to 511 ) All blocks
12-15 (512 blocks: 0 to 511 ) All blocks
17
IS25LP256, IS25WP256
6.2 FUNCTION REGISTER
Function Register Format and Bit definition are described in Table 6.5 and Table 6.6.
Table 6.5 Function Register Format
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
IRL3
IRL2
IRL1
IRL0
ESUS
PSUS
TBS
0
0
0
0
0
0
0
Default
Bit 0
RESET#
Enable/Disable
0 or 1
Table 6.6 Function Register Bit Definition
Bit
Name
Bit 0
RESET#
Enable/Disable
Bit 1
TBS
Bit 2
PSUS
Bit 3
ESUS
Bit 4
IR Lock 0
Bit 5
IR Lock 1
Bit 6
IR Lock 2
Bit 7
IR Lock 3
Definition
RESET# Enable/Disable
“0” indicates Enable additional RESET#
“1” indicates Disable additional RESET#
Top/Bottom Selection. (See Table 6.4 for details)
“0” indicates Top area.
“1” indicates Bottom area.
Program suspend bit:
“0” indicates program is not suspend
“1” indicates program is suspend
Erase suspend bit:
"0" indicates Erase is not suspend
"1" indicates Erase is suspend
Lock the Information Row 0:
“0” indicates the Information Row can be programmed
“1” indicates the Information Row cannot be programmed
Lock the Information Row 1:
“0” indicates the Information Row can be programmed
“1” indicates the Information Row cannot be programmed
Lock the Information Row 2:
“0” indicates the Information Row can be programmed
“1” indicates the Information Row cannot be programmed
Lock the Information Row 3:
“0” indicates the Information Row can be programmed
“1” indicates the Information Row cannot be programmed
Read
/Write
Type
R/W for 0
R for 1
OTP
R/W
OTP
R
Volatile
R
Volatile
R/W
OTP
R/W
OTP
R/W
OTP
R/W
OTP
Note: Function Register bits are only one time programmable and cannot be modified once wrote to “1”.
RESET# Enable/Disable: The default of the bit is dependent on parts. The dedicated parts that have additional
RESET# will default to “0” for enabling additional RESET# pin. All other parts will default to “1” for disabling
additional RESET# pin. If the bit defaults to “1”, it can’t be programmed.
Top/Bottom Selection: BP0~3 area assignment changed from Top or Bottom. See Table 6.4 for details.
PSUS bit: The Program Suspend Status bit indicates when a Program operation has been suspended. The
PSUS changes to “1” after a suspend command is issued during the program operation. Once the suspended
Program resumes, the PSUS bit is reset to “0”.
ESUS bit: The Erase Suspend Status bit indicates when an Erase operation has been suspended. The ESUS
bit is “1” after a suspend command is issued during an Erase operation. Once the suspended Erase resumes,
the ESUS bit is reset to “0”.
IR Lock bit 0 ~ 3: The Information Row Lock bits are programmable. If the bit set to “1”, the Information Row
can’t be programmed.
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6.3 READ REGISTER AND EXTENDED REGISTER
Read Register format and bit definitions are described below. Read Register and Extended Read Register
consist of a pair of rewritable non-volatile register and volatile register, respectively. During power up sequence,
volatile register will be loaded with the value of non-volatile value.
6.3.1 READ REGISTER
Table 6.7 and Table 6.8 define all bits that control features in SPI/QPI modes. HOLD#/RESET# pin selection
(P7) bit is used to select HOLD# pin or RESET# pin. For 16-pin SOIC, RESET# pin will be a separate pin (pin3).
The Dummy Cycle bits (P6, P5, P4, P3) define how many dummy cycles are used during various READ modes.
The wrap selection bits (P2, P1, P0) define burst length with an enable bit.
The SET READ PARAMETERS Operations (SRPNV: 65h, SRPV: C0h or 63h) are used to set all the Read
Register bits, and can thereby define HOLD#/RESET# pin selection, dummy cycles, and burst length with wrap
around. SRPNV is used to set the non-volatile register and SRPV is used to set the volatile register.
Table 6.7 Read Register Parameter Bit Table
Default
P7
HOLD#/
RESET#
0
P6
Dummy
Cycles
0
P5
Dummy
Cycles
0
P4
Dummy
Cycles
0
P3
Dummy
Cycles
0
P2
Wrap
Enable
0
P1
Burst
Length
0
P0
Burst
Length
0
Table 6.8 Read Register Bit Definition
Read/Write
Bit
Name
Definition
P0
Burst Length
Burst Length
R/W
P1
Burst Length
Burst Length
R/W
P2
Burst Length
Set Enable
Burst Length Set Enable Bit:
"0" indicates disable (default)
"1" indicates enable
R/W
P3
Dummy Cycles
P4
Dummy Cycles
P5
Dummy Cycles
P6
Dummy Cycles
P7
HOLD#/
RESET#
Type
Non-Volatile
and Volatile
Non-Volatile
and Volatile
Non-Volatile
and Volatile
Non-Volatile
and Volatile
Non-Volatile
and Volatile
Non-Volatile
and Volatile
Non-Volatile
and Volatile
R/W
Number of Dummy Cycles:
Bits1 to Bit4 can be toggled to select the number of dummy cycles
(1 to 15 cycles)
R/W
R/W
R/W
HOLD#/RESET# pin selection Bit:
"0" indicates the HOLD# pin is selected (default)
"1" indicates the RESET# pin is selected
Non-Volatile
and Volatile
R/W
Table 6.9 Burst Length Data
P1
P0
8 bytes
0
0
16 bytes
0
1
32 bytes
1
0
64 bytes
1
1
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Table 6.10 Wrap Function
Wrap around boundary
P2
Whole array regardless of P1 and P0 value
0
Burst Length set by P1 and P0
1
Table 6.11 Read Dummy Cycles
EB[4:1]
Dummy
Cycles2,3
1
Fast read5
0Bh/0Ch
Fast
read5
0Bh/0Ch
Fast Read
Dual
Output
3Bh/3Ch
SPI
QPI
SPI
SPI
SPI
166MHz
90MHz
166MHz
104MHz
Quad IO
Dual IO
Fast Read
Read
Read
Quad Output
EBh/ECh
BBh/BCh
6Bh/6Ch
FRDTR
0Dh/0Eh
FRDDTR
BDh/BEh
FRQDTR
EDh/EEh
SPI, QPI
SPI/QPI
SPI4
SPI, QPI
150MHz
90MHz
80/80MHz
60MHz
70MHz
0
Default
1
1
84MHz
33MHz
95MHz
55MHz
70MHz
33MHz
50/20MHz
30MHz
20MHz
2
2
120MHz
50MHz
104MHz
80MHz
80MHz
50MHz
66/30MHz
40MHz
30MHz
3
3
133MHz
60MHz
120MHz
95MHz
95MHz
60MHz
80/40MHz
50MHz
40MHz
4
4
166MHz
70MHz
133MHz
104MHz
104MHz
70MHz
80/50MHz
60MHz
50MHz
5
5
166MHz
80MHz
140MHz
120MHz
120MHz
80MHz
80/60MHz
70MHz
60MHz
6
6
166MHz
90MHz
150MHz
133MHz
133MHz
90MHz
80/70MHz
80MHz
70MHz
7
7
166MHz
104MHz
166MHz
140MHz
140MHz
104MHz
80/80MHz
80MHz
80MHz
8
8
166MHz
120MHz
166MHz
150MHz
150MHz
120MHz
80/80MHz
80MHz
80MHz
9
9
166MHz
133MHz
166MHz
166MHz
160MHz
133MHz
80/80MHz
80MHz
80MHz
10
10
166MHz
140MHz
166MHz
166MHz
166MHz
140MHz
80/80MHz
80MHz
80MHz
11
11
166MHz
150MHz
166MHz
166MHz
166MHz
150MHz
80/80MHz
80MHz
80MHz
12
12
166MHz
160MHz
166MHz
166MHz
166MHz
160MHz
80/80MHz
80MHz
80MHz
13
13
166MHz
166MHz
166MHz
166MHz
166MHz
166MHz
80/80MHz
80MHz
80MHz
14
14
166MHz
166MHz
166MHz
166MHz
166MHz
166MHz
80/80MHz
80MHz
80MHz
15
15
166MHz
166MHz
166MHz
166MHz
166MHz
166MHz
80/80MHz
80MHz
80MHz
Notes:
1. Default dummy cycles are as follows.
Operation
Command
Normal mode
Dummy Cycles
DTR mode
Normal mode
DTR mode
Fast Read SPI
0Bh/0Ch
0Dh/0Eh
8
8
Fast Read QPI
0Bh/0Ch
0Dh/0Eh
6
6
Fast Read Dual Output
0Bh/0Ch
-
8
-
Dual IO Read SPI
BBh/BCh
BDh/BEh
4
4
Fast Read Quad Output
6Bh/6Ch
-
8
-
Quad IO Read SPI/QPI
EBh/ECh
EDh/EEh
6
6
Comment
RDUID, RDSFDP, IRRD instructions
are also applied.
2. Enough number of dummy cycles must be applied to execute properly the AX read operation.
3. Must satisfy bus I/O contention. For instance, if the number of dummy cycles and AX bits cycles are same, then
X must be Hi-Z.
4. QPI is not available for FRDDTR command.
5. RDUID, RDSFDP, IRRD instructions are also applied.
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6.3.2 EXTENDED READ REGISTER
Table 6.12 and Table 6.13 define all bits that control features in SPI/QPI modes. The ODS2, ODS1, ODS0
(EB7, EB6, EB5) bits provide a method to set and control driver strength. The four bits (EB3, EB2, EB1, EB0)
are read-only bits and may be checked to know what the status is or whether there is an error. These bits are
not affected by SERPNV or SERPV commands. EB4 bit remains reserved for future use.
The SET EXTENDED READ PARAMETERS Operations (SERPNV: 85h, SERPV: 83h) are used to set all the
Extended Read Register bits, and can thereby define the output driver strength used during READ modes.
SRPNV is used to set the non-volatile register and SRPV is used to set the volatile register.
Table 6.12 Extended Read Register Bit Table
EB7
EB6
EB5
EB4
EB3
EB2
EB1
EB0
ODS2
ODS1
ODS0
Reserved
E_ERR
P_ERR
PROT_E
WIP
1
1
1
1
0
0
0
0
Read/Write
Type
R
Volatile
R
Volatile
R
Volatile
R
Volatile
R
Reserved
Non-Volatile
and Volatile
Non-Volatile
and Volatile
Non-Volatile
and Volatile
Default
Table 6.13 Extended Read Register Bit Definition
Bit
Name
EB0
WIP
EB1
PROT_E
EB2
P_ERR
EB3
E_ERR
EB4
Reserved
EB5
ODS0
EB6
ODS1
EB7
ODS2
Definition
Write In Progress Bit:
Has exactly same function as the bit0 (WIP) of Status Register
“0”: Ready, “1”: Busy
Protection Error Bit:
"0" indicates no error
"1" indicates protection error in an Erase or a Program operation
Program Error Bit:
"0" indicates no error
"1" indicates an Erase operation failure or protection error
Erase Error Bit:
"0" indicates no error
"1" indicates a Program operation failure or protection error
Reserved
R/W
Output Driver Strength:
Output Drive Strength can be selected according to Table 6.14
R/W
R/W
Table 6.14 Driver Strength Table
ODS2
ODS1
ODS0
Description
0
0
0
Reserved
0
0
1
12.50%
0
1
0
25%
0
1
1
37.50%
1
0
0
Reserved
1
0
1
75%
1
1
0
100%
1
1
1
50%
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Remark
Default
21
IS25LP256, IS25WP256
WIP bit: The definition of the WIP bit is exactly same as the one of Status Register.
PROT_E bit: The Protection Error bit indicates whether an Erase or Program operation has attempted to modify
a protected array sector or block, or to access a locked Information Row region. When the bit is set to “1” it
indicates that there was an error or errors in previous Erase or Program operations. See Table 6.15 for details.
P_ERR bit: The Program Error bit indicates whether a Program or Write/Set Register operation has succeeded
or failed, or whether a Program operation has attempted to program a protected array sector/block or a locked
Information Row region. When the bit is set to “1” it indicates that there was an error or errors in previous
Program or Write/Set Register operations. See Table 6.15 for details.
E_ERR bit: The Erase Error bit indicates whether an Erase or Write/Set Non-Volatile Register operation has
succeeded or failed, or whether an Erase operation has attempted to erase a protected array sector/block or a
locked Information Row region. When the bit is set to “1” it indicates that there was an error or errors in previous
Erase or Write/Set Non-Volatile Register operations. See Table 6.15 for details.
Table 6.15 Instructions to set PROT_E, P_ERR, or E_ERR bit
Instructions
Description
PP/4PP/PPQ/4PPQ/PGPPB/
4PGPPB/PGPWD
The commands will set the P_ERR if there is a failure in the operation. Attempting to
program within the protected array sector/block or within an erase suspended sector/block
will result in a programming error with P_ERR and PROT_E set to “1”.
IRP
The command will set the P_ERR if there is a failure in the operation. In attempting to
program within a locked Information Row region, the operation will fail with P_ERR and
PROT_E set to 1.
PGASP
The command will set the P_ERR if there is a failure in the operation. Attempting to program
ASPR[2:1] after the Protection Mode is selected or attempting to program ASPR[2:1] = 00b
will result in a programming error with P_ERR and PROT_E set to “1”.
UNPWD
If the UNPWD command supplied password does not match the hidden internal password,
the UNPWD operation fails in the same manner as a programming operation on a protected
sector/block and sets the P_ERR and PROT_E to “1”.
WRSR/WRABR/SRPNV/
SERPNV/WRBRNV
The update process for the non-volatile register bits involves an erase and a program
operation on the non-volatile register bits. If either the erase or program portion of the update
fails, the related error bit (P_ERR or E_ERR) will be set to “1”.
WRFR
The commands will set the P_ERR if there is a failure in the operation.
SER/4SER/BER32K/
4BER32K/BER64K/
4BER64K/CER/IRER/ERPPB
The commands will set the E_ERR if there is a failure in the operation. E_ERR and PROT_E
will be set to “1” when the user attempts to erase a protected main memory sector/block or a
locked Information Row region. However, the Chip Erase (CER) command will not set
E_ERR and PROT_E if a protected sector/block is found during the command execution.
Notes:
1. OTP bits in the Function Register and TBPARM (OTP bit) in the ASP Register may only be programmed to “1”.
Writing of the bits back to “0” is ignored and no error is set.
2. Read only bits in registers are never modified and the related bits in the Write Register command data byte are
ignored without setting a program or erase error indication.
3. Once the PROT_E, P_ERR, and E_ERR error bits are set to “1”, they remains set to “1” until they are cleared to
“0” with a Clear Extended Read Register (CLERP) command. This means that those error bits must be cleared
through the CLERP command. Alternatively, Hardware Reset, or Software Reset may be used to clear the bits.
4. Any further command will be executed even though the error bits are set to “1”.
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6.4 AUTOBOOT REGISTER
AutoBoot Register Bit (32 bits) definitions are described in Table 6.16.
Table 6.16 AutoBoot Register Parameter Bit Table
Bits
Symbols
Function
Type
Default
Value
AB[31:24]
ABSA
Reserved [0h]
Reserved
0000000h
AB[23:5]
ABSA
AB[4:1]
ABSD
AB0
ABE
AutoBoot Start
Address
AutoBoot Start
Delay
AutoBoot
Enable
NonVolatile
NonVolatile
NonVolatile
00000h
00h
0
Description
Reserved for future use
512 byte boundary address for the start of boot code
access
Number of initial delay cycles between CE# going low
and the first bit of boot code being transferred
1 = AutoBoot is enabled
0 = AutoBoot is not enabled
6.5 BANK ADDRESS REGISTER
Related Commands: Read Volatile Bank Address Register (RDBR 16h/C8h), Write Volatile Bank Address
Register (WRBRV 17h/C5h), Write Non-Volatile Bank Address Register (WRBRNV 18h), Enter 4-byte Address
Mode (EN4B B7h), and Exit 4-byte Address Mode (EX4B 29h).
Bank Address Register Bit (8 bits) definitions are described in Table 6.17 and Table 6.18.
Table 6.17 Bank Address Register Bit Table
BA7
BA6
BA5
BA4
BA3
BA2
BA1
BA0
EXTADD
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
BA24
0
0
0
0
0
0
0
0
Read/Write
Type
R/W
Non-Volatile
and Volatile
R
Reserved
Default
Table 6.18 Bank Address Register Bit Definition
Bit
Name
Definition
BA0
BA24
BA1
Reserved
Enables 128Mb segment selection in 3-byte addressing
"0" indicates lower 128Mb segment is selected.
"1" indicates upper 128Mb segment is selected.
Reserved
BA2
Reserved
Reserved
R
Reserved
BA3
Reserved
Reserved
R
Reserved
BA4
Reserved
Reserved
R
Reserved
BA5
Reserved
Reserved
R
Reserved
BA6
Reserved
R
Reserved
BA7
EXTADD
Reserved
3-byte or 4-byte addressing selection Bit:
"0" indicates 3-byte addressing.
"1" indicates 4-byte addressing.
R/W
Non-Volatile
and Volatile
BA24: The Bank Address Register supplies additional high order bits of the main flash array byte boundary
address for legacy commands that supply only the low order 24 bits of address. The Bank Address is used as
the high bits of address (above A23) for all 3-byte address commands when EXTADD=0. The Bank Address is
not used when EXTADD = 1 and traditional 3-byte address commands are instead required to provide all four
bytes of address.
EXTADD: Extended Address (EXTADD) controls the address field size for legacy SPI commands. By default
(Power Up, Hardware Reset, and Software Reset), it is cleared to “0” for 3 bytes (24 bits) of address. When set
to “1”, the legacy commands will require 4 bytes (32 bits) for the address field.
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6.6 ADVANCED SECTOR/BLOCK PROTECTION (ASP) RELATED REGISTER
6.6.1 ADVANCED SECTOR/BLOCK PROTECTION REGISTER (ASPR)
Related Commands: Read ASP (RDASP 2Bh) and Program ASP (PGASP 2Fh).
Advanced Sector/Block Protection (ASP) Register Bit (16 bits) definitions are described in Tables 6.19 and 6.20.
Table 6.19 Advanced Sector/Block Protection Register (ASPR) Bit Table
Default
15
7 to 14
6
5
4
3
2
1
0
TBPARM
Reserved
Reserved
Reserved
Reserved
Reserved
PWDMLB
PSTMLB
Reserved
1
1
1
1
1
1
1
1
1
Table 6.20 Advanced Sector/Block Protection Register (ASPR) Bit Definition
Bit
Name
0
Reserved
1
PSTMLB
2
PWDMLB
3:14
Reserved
15
TBPARM
Definition
Reserved
Persistent Protection Mode Lock Bit
“0” = Persistent Protection Mode permanently enabled.
“1” = Persistent Protection Mode not permanently enabled.
Password Protection Mode Lock Bit
“0” = Password Protection Mode permanently enabled.
“1” = Password Protection Mode not permanently enabled.
Reserved
Configures Parameter Sectors location
“0” = 4KB physical sectors at top, (high address)
“1” = 4KB physical sectors at bottom (Low address)
Read/Write
R
Reserved
R/W
OTP
R/W
OTP
R
Reserved
R/W
OTP
Type
The Advanced Sector/Block Protection Register (ASPR) is used to permanently configure the behavior of
Advanced Sector/Block Protection (ASP) features and parameter sectors location.
PWDMLB (ASPR[2]) and PSTMLB (ASPR[1]) bits: When shipped from the factory, all devices default ASP to
the Persistent Protection Mode, with all sectors unprotected, when power is applied. The device programmer or
host system must then choose which sector/block protection method to use. Programming either of the
Protection Mode Lock Bits locks the part permanently in the selected mode:
•
•
•
•
ASPR[2:1] = 11 = No ASP mode selected, Persistent Protection Mode is the default.
ASPR[2:1] = 10 = Persistent Protection Mode permanently selected.
ASPR[2:1] = 01 = Password Protection Mode permanently selected.
ASPR[2:1] = 00 = Illegal condition, attempting to program both bits to zero results in a programming failure
and the program operation will abort. It will result in a programming error with P_ERR set to 1.
As a result, PWDMLB and PSTMLB are mutually exclusive, only one may be programmed to zero.
ASPR programming rules:
• If the Password Protection Mode is chosen, the password must be programmed prior to setting the
corresponding bit.
• Once the Protection Mode is selected, the ASPR[2:1] bits are permanently protected from programming and
no further change to the ASPR[2:1] is allowed. Attempting to program ASPR[2:1] after selected will result in a
programming error with P_ERR set to 1. The programming time of the ASPR is the same as the typical page
programming time. The system can determine the status of the ASPR programming operation by reading the
WIP bit in the Status Register or Extended Read Register.
• TBPARM bit can be programmed even after ASPR[2:1] bits are programmed while the FREEZE bit in the
PPB Lock Register is “0”.
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TBPARM bit: TBPARM defines the logical location of the parameter block. The parameter block consists of
thirty-two 4KB sectors, which replace two 64KB blocks. When TBPARM is set to a “0” the parameter block is in
the top of the memory array address space. When TBPARM is set to a “1” the parameter block is at the Bottom
of the array. TBPARM is OTP and set to a “1” when it ships from Factory. If TBPARM is programmed to “0”, an
attempt to change it back to “1” will fail and ignore the Program.
The desired state of TBPARM must be selected during the initial configuration of the device during system
manufacture; before the first program or erase operation on the main flash array. TBPARM must not be
programmed after programming or erasing is done in the main flash array.
TBS can be programmed independent of TBPARM. Therefore, the user can elect to store parameter information
from the bottom of the array and protect boot code starting at the top of the array, and vice versa. Or the user
can select to store and protect the parameter information starting from the top or bottom together.
6.6.2 PASSWORD REGISTER
Related Commands: Read Password (RDPWD E7h), Program Password (PGPWD E8h), and Unlock Password
(UNPWD, E9h).
Table 6.21 Password Register Bit Definition
Bit
0:63
Name
Definition
Default
Read/Write
Type
PSTMLB
64 bit hidden password:
The password is no longer readable after the password
protection mode is selected by programming ASPR bit 2 to
zero.
FFFFFFFFFFFFFFFFh
R/W
OTP
6.6.3 PPB LOCK REGISTER
Related Commands: Read PPB Lock Bit (RDPLB A7h), Write PPB Lock Bit (WRPLB A6h), and Set FREEZE Bit
(SFRZ 91h). The WRPLB is available only in Persistent Protection Mode.
Table 6.22 PPB Lock Register Bit Definition
Bit
Name
0
PPBLK
1:6
Reserved
7
FREEZE
Definition
PPB Lock bit: Protect PPB Array
“0” = PPB array protected until next power cycle
or Hardware Reset
“1” = PPB array may be programmed or erased.
Reserved
Lock current state of BP3-0 bits in Status Register, TBS in
Function Register and TBPARM in ASPR, and Information
Row (IR) regions.
“1” = Locked
“0” = Un-locked
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Default
Read/Write
Type
Persistent: 1
Password: 0
R/W
Volatile
R
Reserved
R/W
Volatile
Reserved
0
25
IS25LP256, IS25WP256
PPBLK bit: The PPB Lock bit is a volatile bit for protecting all PPB bits. When cleared to 0, it locks all PPBs,
when set to 1, it allows the PPBs to be changed. The WRPLB command is used to clear the PPB Lock bit to 0.
The PPB Lock bit must be cleared to 0 only after all the PPBs are configured to the desired settings.
In Persistent Protection mode, the PPB Lock bit is set to 1 during POR or Hardware Reset. When cleared to 0,
no software command sequence can set the PPB Lock bit to 1, only another Hardware Reset or power-up can
set the PPB Lock bit.
In the Password Protection mode, the PPB Lock bit is cleared to 0 during POR or Hardware Reset. The PPB
Lock bit can only be set to 1 by the Unlock Password command.
FREEZE bit: FREEZE bit, when set to “1”, locks the current state of BP3-0 in Status Register, TBS in the
Function Register, TBPARM in the Advanced Sector/Block Protection Register, and the Information Row. This
prevents writing, programming, or erasing these areas. As long as FREEZE remains cleared to logic “0”, BP3-0
in Status Register, TBS in the Function Register, and TBPARM in the Advanced Sector/Block Protection
Register are writable and the Information Row is programmable. Once FREEZE has been written to a logic “1” it
can only be cleared to a logic “0” by a power-on cycle or a Hardware Reset. Software Reset will not affect the
state of FREEZE. The FREEZE is volatile and the default state of FREEZE after power-on is “0”. The FREEZE
can be set to “1” by a SFRZ command.
6.6.4 PPB REGISTER
Related Commands: Read PPB (RDPPB FCh or 4RDPPB E2h)), Program PPB (PGPPB FDh or 4PGPPB E3h),
and Erase PPB (ERPPB E4h).
Table 6.23 PPB Register Bit Definition
Bit
0:7
Name
Definition
Default
Read/Write
Type
PPB
Read or Program per sector/block PPB:
00h = PPB for the sector/block addressed by the PPBRD or
PPBP command is programmed to “0”, protecting that
sector/block from program or erase operations.
FFh = PPB for the sector/block addressed by the PPBRD or
PPBP command is erased to “1”, not protecting that
sector/block from program or erase operations.
FFh
R/W
Non-Volatile
6.6.5 DYB REGISTER
Related Commands: Read DYB (RDDYB FAh or 4RDDYB E0h) and Write DYB (WRDYB FBh or 4WRDYB
E1h).
Table 6.24 DYB Register Bit Definition
Bit
0:7
Name
Definition
Default
Read/Write
Type
DYB
Read or Write per sector/block DYB:
00h = DYB for the sector/block addressed by the DYBRD or
DYBP command is cleared to “0”, protecting that
sector/block from program or erase operations.
FFh = DYB for the sector/block addressed by the DYBRD or
DYBP command is set to “1”, not protecting that
sector/block from program or erase operations.
FFh
R/W
Volatile
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IS25LP256, IS25WP256
7. PROTECTION MODE
The device supports hardware and software write-protection mechanisms.
7.1 HARDWARE WRITE PROTECTION
The Write Protection (WP#) pin provides a hardware write protection method for BP3, BP2, BP1, BP0, SRWD,
and QE in the Status Register. Refer to the section 6.1 STATUS REGISTER.
Write inhibit voltage (VWI) is specified in the section 9.7 POWER-UP AND POWER-DOWN. All write sequence
will be ignored when Vcc drops to VWI.
Table 7.1 Hardware Write Protection on Status Register
SRWD
WP#
Status Register
0
Low
Writable
1
Low
Protected
0
High
Writable
1
High
Writable
Note: Before the execution of any program, erase or Write Status/Function Register instruction, the Write Enable
Latch (WEL) bit must be enabled by executing a Write Enable (WREN) instruction. If the WEL bit is not
enabled, the program, erase or write register instruction will be ignored.
7.2 SOFTWARE WRITE PROTECTION
The device also provides two kinds of software write protection feature. One is Block Protection by Block
Protection bits (BP3, BP2, BP1, BP0) and another is Advanced Sector/Block Protection (ASP). When Block
Protection is enabled (i.e., any BP3-0 are set to “1”), Advanced Sector/Block Protection (ASP) can still be used
to protect sectors/blocks not protected by the Block Protection scheme. In the case that both ASP and Block
Protection are used on the same sector/block the logical OR of ASP and Block Protection related to the
sector/block is used.
Warning: ASP and Block Protection should not be used concurrently. Use one or the other, but not both.
7.2.1 BLOCK PROTECTION BITS
The device provides a software write protection feature. The Block Protection bits (BP3, BP2, BP1, BP0) allow
part or the whole memory area to be write-protected. For details, see 6.1 Status Register.
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7.2.2 ADVANCED SECTOR/BLOCK PROTECTION (ASP)
There are two ways to implement software Advanced Sector/Block Protection on this device: Password
Protection method or Persistent Protection methods. Through these two protection methods, user can disable or
enable the programming or erasing operation to any or all blocks including 32 top 4K sectors or 32 bottom 4K
sectors. The Figure 7.1 shows an overview of these methods.
Every main flash array block/top sector/bottom sector has a non-volatile (PPB) and a volatile (DYB) protection
bit associated with it. When either bit is 0, the sector is protected from program and erase operations.
The PPB bits are protected from program and erase when the PPB Lock bit is “0”. The PPB bits are erased so
that all main flash array sectors are unprotected when shipped from factory.
There are two methods for managing the state of the PPB Lock bit, Persistent Protection and Password
Protection.
The Persistent Protection Mode sets the PPB Lock bit to “1” during power up or Hardware Reset so that the
PPB bits are unprotected. There is a WRPLB command to clear the PPB Lock bit to “0” to protect the PPB bits.
There is no command in the Persistent Protection method to set the PPB Lock bit therefore the PPB Lock bit will
remain at “0” until the next power up or Hardware Reset. The Persistent Protection method allows boot code the
option of changing sector protection by programming or erasing the PPB, then protecting the PPB from further
change for the remainder of normal system operation by clearing the PPB Lock bit. This is sometimes called
Boot-code controlled sector protection.
The Password Protection Mode requires use of a password to control PPB protection. In the Password
Protection Mode, the PPB Lock bit is cleared to “0” during power up or Hardware Reset to protect the PPB bits.
A 64-bit password may be permanently programmed and hidden for the Password Protection Mode. The
UNPWD command can be used to provide a password for comparison with the hidden password. If the
password matches the PPB Lock bit is set to “1” to unprotect the PPB. The WRPLB command can be used to
clear the PPB Lock bit to “0”. After clearing the PPB Lock bit to “0”, the UNPWD command can be used again to
unprotect the PPB.
The selection of the PPB Lock bit management method is made by programming OTP bits in the ASP Register
so as to permanently select the method used.
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Figure 7.1 Advanced Sector/Block Protection
ASP Register Bits (OTP)
Password Protection
Mode (ASPR[2]=0)
Persistent Protection
Mode (ASPR[1]=0)
64-bit Password
(OTP)
Dynamic Protection Bit
(DYB)
Memory Array
DYB 0
Sector/Block 0
PPB 0
DYB 1
Sector/Block 1
PPB 1
DYB 2
Sector/Block 2
PPB 2
DYB 3
Sector/Block 3
PPB 3
DYB N-3
Sector/Block N-3
PPB N-3
DYB N-2
Sector/Block
PPB N-2
DYB N-1
Sector/Block
PPB N-1
DYB N
Sector/Block
PPB N
1. 0 = Sector/Block Protected
1 = Sector/Block Unprotected
2. The bit is volatile and
defaults to “1” (Unprotected)
after power up.
Persistent Protection Bit
(PPB)
PPB Lock Bit
1. 0 = PPBs Locked,
1 = PPBs Unlocked
2. The bit is volatile, and defaults to “1”
(Persistent Mode) or
“0” (Password Mode) upon reset.
3. Programming to “0” locks all
PPBs to their current state.
4. Password Method requires a
password to set PPB Lock bit to “1”
to enable program or erase of
PPB bits.
5. Persistent Method only allows
PPB Lock bit to be cleared to ‘0’ to
prevent program or erase of PPB
bits. Power off or hardware reset
required to set PPB Lock bit to “1”.
1. 0 = Sector/Block Protected
1 = Sector/Block Unprotected
2. PPBs programmed
individually, but erased
collectively.
Note: N = 542 = 32 (32 Top 4K sectors or 32 Bottom 4K sectors) + 510 (510 64K blocks)
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Table 7.2 PPB/DYB and Sector/Block mapping (TPPARM = 0)
Block No.
(64Kbyte)
PPB Group
DYB Group
PPB 0
:
:
PPB 15
PPB 16
:
:
PPB 31
DYB 0
:
:
DYB 15
DYB 16
:
:
DYB 31
PPB 32
DYB 32
Block 2
:
:
:
Block 0
Block 1
PPB 284
DYB 284
Block 254
PPB 285
DYB 285
Block 255
:
:
:
PPB 540
DYB 540
Block 510
PPB 541
DYB 541
Block 511
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Sector 0
:
:
Sector 15
Sector 16
:
:
Sector 31
Sector 32
:
Sector Size
(Kbyte)
4
:
:
4
4
:
:
4
4
:
000000h - 000FFFh
:
:
00F000h - 00FFFFh
010000h - 010FFFh
:
:
01F000h - 01FFFFh
020000h - 020FFFh
:
:
Sector 47
:
4
:
02F000h - 02FFFFh
:
:
:
Sector 4064
:
:
Sector 4079
Sector 4080
:
:
4
:
:
4
4
:
:
FE0000h – FE0FFFh
:
:
FEF000h – FEFFFFh
FF0000h – FF0FFFh
:
:
Sector 4095
4
FFF000h – FFFFFFh
:
:
:
Sector 8160
:
:
Sector 8175
Sector 8176
:
:
Sector 8191
4
:
:
4
4
:
:
4
1FE0000h – 1FE0FFFh
:
:
1FEF000h – 1FEFFFFh
1FF0000h – 1FF0FFFh
:
:
1FFF000h – 1FFFFFFh
Sector No.
Address Range
30
IS25LP256, IS25WP256
Table 7.3 PPB/DYB and Sector/Block mapping (TPPARM = 1)
PPB Group
DYB Group
Block No.
(64Kbyte)
PPB 0
DYB 0
Block 0
PPB 1
DYB 1
Block 1
PPB 2
DYB 2
Block 2
:
:
:
PPB 254
DYB 254
Block 254
PPB 255
DYB 255
Block 255
:
:
:
PPB 510
:
:
PPB 525
PPB 525
:
:
PPB 541
DYB 510
:
:
DYB 525
DYB 526
:
:
DYB 541
Block 510
Block 511
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Sector 0
:
:
Sector 15
Sector 16
:
:
Sector 31
Sector 32
:
Sector Size
(Kbyte)
4
:
:
4
4
:
:
4
4
:
000000h - 000FFFh
:
:
00F000h - 00FFFFh
010000h - 010FFFh
:
:
01F000h - 01FFFFh
020000h - 020FFFh
:
:
Sector 47
:
4
:
02F000h - 02FFFFh
:
:
:
Sector 4064
:
:
Sector 4079
Sector 4080
:
:
4
:
:
4
4
:
:
FE0000h – FE0FFFh
:
:
FEF000h – FEFFFFh
FF0000h – FF0FFFh
:
:
Sector 4095
4
FFF000h – FFFFFFh
:
:
:
Sector 8160
:
:
Sector 8175
Sector 8176
:
:
Sector 8191
4
:
:
4
4
:
:
4
1FE0000h – 1FE0FFFh
:
:
1FEF000h – 1FEFFFFh
1FF0000h – 1FF0FFFh
:
:
1FFF000h – 1FFFFFFh
Sector No.
Address Range
31
IS25LP256, IS25WP256
Persistent Protection Bits (PPBs)
The Persistent Protection Bits (PPBs) are unique for each sector/block and non-volatile (refer to Figure 7.1,
Table 7.2, and Table 7.3). It is programmed individually but must be erased as a group, similar to the way
individual words may be programmed in the main array but an entire sector/block must be erased at the same
time. The PPBs have the same endurances as the Flash memory. Preprogramming and verification prior to
erasure are handled by the device, and therefore do not require system monitoring. Programming a PPB bit
requires the typical page programming time. Erasing all the PPBs requires typical sector erase time. During PPB
bit programming and PPB bit erasing, status is available by reading the Status Register or Extended Read
Register. Reading of a PPB bit requires the initial access time of the device.
Notes:
1. Each PPB is individually programmed to “0” and all are erased to “1” in parallel.
2. The PPB Lock bit must be cleared first before changing the status of a PPB.
3. While programming PPB, array data cannot be read from any sectors/blocks.
4. When reading the PPB of the desired sector/block the address should be location zero within the sector/block. The high
order address bits not used must be zero.
5. There are no means for individually erasing a specific PPB and no specific sector/block address is required for this
operation.
6. The state of the PPB for a given sector/block can be verified by using a PPB Read command.
7. When the parts are first shipped, the PPBs are cleared (erased to “1”).
Dynamic Protection Bits (DYBs)
Dynamic Protection Bits (DYBs) are volatile and unique for each sector/block and can be individually modified.
DYBs only control the protection for unprotected sectors/blocks that have their PPBs cleared (erased to “1”). By
issuing the Write DYB command, the DYBs are cleared to “0” or set to “1”, thus placing each sector/block in the
protected or unprotected state respectively. This feature allows software to easily protect sectors/blocks against
inadvertent changes, yet does not prevent the easy removal of protection when changes are needed. The DYBs
can be set or cleared as often as needed as they are volatile bits.
Persistent Protection Bit (PPB) Lock Bit
The PPB Lock bit is a volatile bit for protecting all PPB bits. When cleared to “0”, it locks all PPBs and when set
to “1”, it allows the PPBs to be changed. . If the PPB Lock bit is “0”, the PPB Program or Erase command does
not execute and fails without programming or erasing the PPB.
In Persistent Protection mode, the PPB Lock bit is set to “1” during power up or Hardware Reset. When cleared
to “0”, no software command sequence can set the PPB Lock bit to “1”, only another Hardware Reset or powerup can set the PPB Lock bit.
In the Password Protection mode, the PPB Lock bit is cleared to “0” during power up or a Hardware Reset
during power up or a Hardware Reset during power up or a Hardware Reset. The PPB Lock bit can only be set
to “1” by the Password Unlock command.
The PPB Lock bit must be cleared to “0” only after all PPBs are configured to the desired settings.
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Sector/Block Protection States Summary
Each sector in specific blocks and each of all other blocks except for the specific blocks can be in one of the
following protection states:
• Unlocked – The sector/block is unprotected and protection can be changed by a simple command. The
protection state defaults to unprotected after a power cycle, software reset, or hardware reset.
• Dynamically Locked – A sector/block is protected and protection can be changed by a simple command. The
protection state is not saved across a power cycle or reset.
• Persistently Locked – A sector/block is protected and protection can only be changed if the PPB Lock bit is
set to “1”. The protection state is non-volatile and saved across a power cycle or reset. Changing the
protection state requires programming and or erase of the PPB bits.
Table 7.4 contains all possible combinations of the DYB, PPB, and PPB Lock bit relating to the status of the
sector/block. In summary, if the PPB Lock bit is locked (cleared to “0”), no changes to the PPBs are allowed.
The PPB Lock bit can only be unlocked (set to “1”) through a Hardware Reset or power cycle.
Table 7.4 Sector/Block Protection States
Protection Bit values
“0” = Locked or Protected
“1” = Unlocked or Unprotected
PPB Lock Bit
Assigned Sector/Block State
PPB
DYB
1
1
Unprotected
1
0
Protected
0
1
Protected
0
0
Protected
1
Changeable
Changeable
0
NOT changeable
Changeable
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Persistent Protection Mode
The Persistent Protection Mode sets the PPB Lock bit to “1” during power up or Hardware Reset so that the
PPB bits are unprotected by a device Hardware Reset. Software Reset does not affect the PPB Lock bit. The
WRPLB command can clear the PPB Lock bit to “0” to protect the PPB. There is no command to set the PPB
Lock bit therefore the PPB Lock bit will remain at “0” until the next power up or Hardware Reset.
Password Protection Mode
The Password Protection Mode allows an even higher level of security than the Persistent Protection Mode by
requiring a 64-bit password for unlocking the device PPB Lock bit. In addition to this password requirement,
after power up or Hardware Reset, the PPB Lock bit is cleared to “0” to maintain the password mode of
operation. Successful execution of the Unlock Password command by entering the entire password sets the
PPB Lock bit to “1”, allowing for sector/block PPBs modifications.
Notes:
1. The password is all “1”s when shipped from Factory. It is located in its own memory space and is accessible through the
use of the Program Password and Read Password commands.
2. Once the Password is programmed and verified, the Password Protection Mode Lock Bit (ASPR[2]=0) in ASP Register
must be programmed in order to prevent reading or modifying the password. After the Password Protection Mode Lock
Bit is programmed, all further Program and Read commands to the password region are disabled and these commands
are ignored so that there is no means to verify what the password is. Password verification is only allowed before
selecting the Password Protection Mode.
3. The Program Password Command is only capable of programming “0”s. Programming a “1” after a cell is programmed as
a “0” results in the cell left as a “0” with no programming error.
4. All 64-bit password combinations are valid as a password.
5. The Protection Mode Lock Bits in ASP Register are not erasable because they are OTP.
6. The exact password must be entered in order for the unlocking function to occur. If the password provided by Unlock
Password command does not match the hidden internal password, the unlock operation fails in the same manner as a
programming operation on a protected sector/block. The P_ERR and PROT_E are set to 1 and the PPB Lock bit remains
cleared to 0. In this case it is a failure to change the state of the PPB Lock bit because it is still protected by the lack of a
valid password.
7. The Unlock Password command cannot be accepted any faster than once every 100μs ± 20μs. This makes it take an
unreasonably long time (58 million years) for a hacker to run through all the 64-bit combinations in an attempt to correctly
match a password. The Read Status Register command or the Read Extended Read Register may be used to read the
WIP bit to determine when the device has completed the Unlock Password command or is ready to accept a new
password command. When a valid password is provided the Unlock Password command does not insert the 100μs delay
before returning the WIP bit to zero.
8. If the password is lost after selecting the Password Protection Mode, there is no way to set the PPB Lock bit.
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IS25LP256, IS25WP256
8. DEVICE OPERATION
8.1 COMMAND OVERVIEW
The device utilizes an 8-bit instruction register. Refer to Table 8.4. Instruction Set for details on instructions and
instruction codes. All instructions, addresses, and data are shifted in with the most significant bit (MSB) first on
Serial Data Input (SI) or Serial Data IOs (IO0, IO1, IO2, IO3). The input data on SI or IOs is latched on the rising
edge of Serial Clock (SCK) for normal mode and both of rising and falling edges for DTR mode after Chip
Enable (CE#) is driven low (VIL). Every instruction sequence starts with a one-byte instruction code and is
followed by address bytes and/or dummy cycles (configurable) and/or data bytes, depending on the type of
instruction. CE# must be driven high (VIH) after the last bit of the instruction sequence has been shifted in to end
the operation.
Commands are structured as follows:
• Each command begins with a byte (eight bits) instruction.
• The instruction may be stand alone or may be followed by address bits to select a location within one of
several address spaces in the device. The address may be either a 24-bit or 32-bit byte boundary address.
• The SPI interface with Multiple IO provides the option for each transfer of address and data information to be
done one, two, or four bits in parallel. This enables a tradeoff between the number of signal connections (IO
bus width) and the speed of information transfer. If the host system can support a two or four bit wide IO bus
the memory performance can be increased by using the instructions that provide parallel two bit (dual) or
parallel four bit (quad) transfers.
• The width of all transfers following the instruction are determined by the instruction sent.
• All single bit or parallel bit groups are transferred in most to least significant bit order.
• Some instructions send Mode Bits following the address to indicate that the next command will be of the
same type with an implied, rather than an explicit, instruction. The next command thus does not provide an
instruction byte, only a new address and mode bits. This reduces the time needed to send each command
when the same command type is repeated in a sequence of commands.
• The address or Mode Bits may be followed by Dummy Cycles before read data is returned to the host.
• Dummy Cycles may be zero to several SCK cycles. In fact, Mode Bits will be counted as a part of Dummy
Cycles.
• All instruction, address, Mode, and data information is transferred in byte granularity. Addresses are shifted
into the device with the Most Significant Byte first. All data is transferred with the lowest address byte sent
first. Following bytes of data are sent in lowest to highest byte address order i.e. the byte address increments.
• All attempts to read the flash memory array during a program, erase, or a write cycle (embedded operations)
are ignored. The embedded operation will continue to execute without any affect. A very limited set of
commands are accepted during an embedded operation. These are discussed in the individual command
descriptions. While a program, erase, or write operation is in progress, it is recommended to check that the
Write In Progress (WIP) bit is “0” before issuing most commands to the device, to ensure the new command
can be accepted.
• Depending on the command, the time for execution varies. A command to read status information from an
executing command is available to determine when the command completes execution and whether the
command was successful.
• Following are some general signal relationship descriptions to keep in mind.
– The host always controls the Chip Enable (CE#), Serial Clock (SCK), and Serial Input (SI) - SI for single
bit wide transfers. The memory drives Serial Output (SO) for single bit read transfers. The host and
memory alternately drive the IO0-IO3 signals during Dual and Quad transfers.
– All commands begin with the host selecting the memory by driving CE# low before the first rising edge of
SCK. CE# is kept low throughout a command and when CE# is returned high the command ends.
Generally, CE# remains low for 8-bit transfer multiples to transfer byte granularity information. All commands
will not be accepted if CE# is returned high not at an 8-bit boundary.
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8.2 COMMAND SET SUMMARY
Extended Addressing
To accommodate addressing above 128Mb (24-bit), there are three options:
1. New instructions with 4-byte (32-bit) address. See Table 8.2.
2. 4-byte addressing with the 3-byte address instructions:
For backward compatibility to the 3-byte address instructions, the standard instructions can be used in
conjunction with the EXTADD Bit in the Bank Address Register (BAR[7]) or Enter 4-byte Address Mode to
switch from 3 bytes to 4 bytes of address field. When EXTADD bit is set to 1 or Enter 4-byte Address Mode
command is issued only in the case that EXTADD bit = 0, the instructions are changed to require 4-byte (32bit) for the address field. See Table 8.3.
3. 3-byte addressing with the 3-byte address instructions:
For backward compatibility to the 3-byte addressing, the standard instructions can be used in conjunction
with the Bank Address Register. See Table 8.3.
• The Bank Address Register is used to switch between 128Mbit (16Mbyte) banks of memory, the standard
3-byte address selects an address within the bank selected by the Bank Address Register.
o The host system writes the Bank Address Register to access beyond the first 128Mbit of memory.
o This applies to read, erase, and program commands.
• The Bank Address Register provides the high order (4th) byte of address, which is used to address the
available memory at addresses greater than 128Mbit.
• Bank Address Register bits are volatile.
o On power up, the default is Bank0 (the lowest address 16 Mbytes).
• For Read, the device will continuously transfer out data until the end of the array.
o There is no bank to bank delay.
o The Bank Address Register is not updated.
o The Bank Address Register value is used only for the initial address of an access.
Table 8.1 Bank Address Map
Bank Address Register Bit 0
Bank
0
0
00000000h
00FFFFFFh
1
1
01000000h
01FFFFFFh
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Memory Array Address Range
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IS25LP256, IS25WP256
Table 8.2 New Instruction Set with 4-byte address
Instruction Name
Operation
Code
Address Mode
4NORD
4-byte Address Normal Read Mode
13h
4-byte Address
4FRD
4-byte Address Fast Read Mode
0Ch
4-byte Address
4FRDIO
4-byte Address Fast Read Dual I/O
BCh
4-byte Address
4FRDO
4-byte Address Fast Read Dual Output
3Ch
4-byte Address
4FRQIO
4-byte Address Fast Read Quad I/O
ECh
4-byte Address
4FRQO
4-byte Address Fast Read Quad Output
6Ch
4-byte Address
4FRDTR
4-byte Address Fast Read DTR Mode
0Eh
4-byte Address
4FRDDTR
4-byte Address Fast Read Dual I/O DTR
BEh
4-byte Address
4FRQDTR
4-byte Address Fast Read Quad I/O DTR
EEh
4-byte Address
4PP
4-byte Address Serial Input Page Program
12h
4-byte Address
4PPQ
4-byte Address Quad Input Page Program
34h/3Eh
4-byte Address
4SER
4-byte Address Sector Erase
21h
4-byte Address
4BER32 (32KB)
4-byte Address Block Erase 32KB
5Ch
4-byte Address
4BER64 (64KB)
4-byte Address Block Erase 64KB
DCh
4-byte Address
4SECUNLOCK
4-byte Address Sector Unlock
25h
4-byte Address
4RDDYB
4-byte Address Read DYB
E0
4-byte Address
4WRDYB
4-byte Address Write DYB
E1
4-byte Address
4RDPPB
4-byte Address Read PPB
E2
4-byte Address
4PGPPB
4-byte Address Program PPB
E3
4-byte Address
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IS25LP256, IS25WP256
Table 8.3 Instruction Set with 3-byte or 4-byte address according to EXTADD Bit setting
Address Mode
Instruction Name
Operation
Code
EXTADD (BAR[7] = 1
EXTADD (BAR[7]) = 0
NORD
Normal Read Mode
03h
4-byte Address
3-byte Address
FRD
Fast Read Mode
0Bh
4-byte Address
3-byte Address
FRDIO
Fast Read Dual I/O
BBh
4-byte Address
3-byte Address
FRDO
Fast Read Dual Output
3Bh
4-byte Address
3-byte Address
FRQIO
Fast Read Quad I/O
EBh
4-byte Address
3-byte Address
FRQO
Fast Read Quad Output
6Bh
4-byte Address
3-byte Address
FRDTR
Fast Read DTR Mode
0Dh
4-byte Address
3-byte Address
FRDDTR
Fast Read Dual I/O DTR
BDh
4-byte Address
3-byte Address
FRQDTR
Fast Read Quad I/O DTR
EDh
4-byte Address
3-byte Address
PP
Serial Input Page Program
02h
4-byte Address
3-byte Address
PPQ
Quad Input Page Program
32h/38h
4-byte Address
3-byte Address
SER
Sector Erase
D7h/20h
4-byte Address
3-byte Address
BER32 (32KB)
Block Erase 32KB
52h
4-byte Address
3-byte Address
BER64 (64KB)
Block Erase 64KB
D8h
4-byte Address
3-byte Address
SECUNLOCK
Sector Unlock
26h
4-byte Address
3-byte Address
RDDYB
Read DYB
FA
4-byte Address
3-byte Address
WRDYB
Write DYB
FB
4-byte Address
3-byte Address
RDPPB
Read PPB
FC
4-byte Address
3-byte Address
PGPPB
Program PPB
FD
4-byte Address
3-byte Address
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IS25LP256, IS25WP256
Table 8.4 All Instruction Set
Instruction
Name
Operation
Mode
Byte0
Byte1
Byte2
Byte3
Byte4
NORD
Normal Read
Mode
(3-byte Address)
SPI
03h
A
<23:16>
A
<15:8>
A
<7:0>
Data out
NORD
Normal Read
Mode
(4-byte Address)
SPI
03h
A
<31::24>
A
<23:16>
A
<15:8>
A
<7:0>
Data out
4NORD
4-byte Address
Normal Read
Mode
SPI
13h
A
<31::24>
A
<23:16>
A
<15:8>
A
<7:0>
Data out
FRD
Fast Read
Mode
(3-byte Address)
SPI
QPI
0Bh
A
<23:16>
A
<15:8>
A
<7:0>
Dummy(1)
Byte
Data out
FRD
Fast Read
Mode
(4-byte Address)
SPI
QPI
0Bh
A
<31::24>
A
<23:16>
A
<15:8>
A
<7:0>
Dummy(1)
Byte
Data out
4FRD
4-byte Address
Fast Read
Mode
SPI
QPI
0Ch
A
<31::24>
A
<23:16>
A
<15:8>
A
<7:0>
Dummy(1)
Byte
Data out
FRDIO
Fast Read
Dual I/O
(3-byte Address)
SPI
BBh
A
<23:16>
Dual
A
<15:8>
Dual
A
<7:0>
Dual
AXh(1),(2)
Dual
Dual
Data out
FRDIO
Fast Read
Dual I/O
(4-byte Address)
SPI
BBh
A
<31::24>
A
<23:16>
Dual
A
<15:8>
Dual
A
<7:0>
Dual
AXh(1),(2)
Dual
Dual
Data out
4FRDIO
4-byte Address
Fast Read
Dual I/O
SPI
BCh
A
<31::24>
A
<23:16>
Dual
A
<15:8>
Dual
A
<7:0>
Dual
AXh(1),(2)
Dual
Dual
Data out
FRDO
Fast Read
Dual Output
(3-byte Address)
SPI
3Bh
A
<23:16>
A
<15:8>
A
<7:0>
Dummy(1)
Byte
Dual
Data out
FRDO
Fast Read
Dual Output
(4-byte Address)
SPI
3Bh
A
<31::24>
A
<23:16>
A
<15:8>
A
<7:0>
Dummy(1)
Byte
Dual
Data out
4FRDO
4-byte Address
Fast Read
Dual Output
SPI
3Ch
A
<31::24>
A
<23:16>
A
<15:8>
A
<7:0>
Dummy(1)
Byte
Dual
Data out
FRQIO
Fast Read
Quad I/O
(3-byte Address)
SPI
QPI
EBh
A
<23:16>
Quad
A
<15:8>
Quad
A
<7:0>
Quad
AXh(1), (2)
Quad
Quad
Data out
FRQIO
Fast Read
Quad I/O
(4-byte Address)
SPI
QPI
EBh
A
<31::24>
Quad
A
<23:16>
Quad
A
<15:8>
Quad
A
<7:0>
Quad
AXh(1), (2)
Quad
Quad
Data out
4FRQIO
4-byte Address
Fast Read
Quad I/O
SPI
QPI
ECh
A
<31::24>
Quad
A
<23:16>
Quad
A
<15:8>
Quad
A
<7:0>
Quad
AXh(1), (2)
Quad
Quad
Data out
FRQO
Fast Read
Quad Output
(3-byte Address)
SPI
6Bh
A
<23:16>
A
<15:8>
A
<7:0>
Dummy(1)
Byte
Quad
Data out
FRQO
Fast Read
Quad Output
(4-byte Address)
SPI
6Bh
A
<31::24>
A
<23:16>
A
<15:8>
A
<7:0>
Dummy(1)
Byte
Quad
Data out
4FRQO
4-byte Address
Fast Read
Quad Output
SPI
6Ch
A
<31::24>
A
<23:16>
A
<15:8>
A
<7:0>
Dummy(1)
Byte
Quad
Data out
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Byte5
Byte6
39
IS25LP256, IS25WP256
Instruction
Name
Operation
Mode
Byte0
Byte1
Byte2
Byte3
Byte4
Byte5
FRDTR
Fast Read
DTR Mode
(3-byte Address)
SPI
QPI
0Dh
A
<23:16>
A
<15:8>
A
<7:0>
Dummy(1)
Byte
Dual
Data out
FRDTR
Fast Read
DTR Mode
(4-byte Address)
SPI
QPI
0Dh
A
<31::24>
A
<23:16>
A
<15:8>
A
<7:0>
Dummy(1)
Byte
Dual
Data out
4FRDTR
4-byte Address
Fast Read
DTR Mode
SPI
QPI
0Eh
A
<31::24>
A
<23:16>
A
<15:8>
A
<7:0>
Dummy(1)
Byte
Dual
Data out
FRDDTR
Fast Read
Dual I/O DTR
(3-byte Address)
SPI
BDh
A
<23:16>
Dual
A
<15:8>
Dual
A
<7:0>
Dual
AXh(1), (2)
Dual
Dual
Data out
FRDDTR
Fast Read
Dual I/O DTR
(4-byte Address)
SPI
BDh
A
<31::24>
A
<23:16>
Dual
A
<15:8>
Dual
A
<7:0>
Dual
AXh(1), (2)
Dual
Dual
Data out
4FRDDTR
4-byte Address
Fast Read
Dual I/O DTR
SPI
BEh
A
<31::24>
A
<23:16>
Dual
A
<15:8>
Dual
A
<7:0>
Dual
AXh(1), (2)
Dual
Dual
Data out
FRQDTR
Fast Read
Quad I/O DTR
(3-byte Address)
SPI
QPI
EDh
A
<23:16>
A
<15:8>
A
<7:0>
AXh(1), (2)
Quad
Quad
Data out
FRQDTR
Fast Read
Quad I/O DTR
(4-byte Address)
SPI
QPI
EDh
A
<31::24>
A
<23:16>
A
<15:8>
A
<7:0>
AXh(1), (2)
Quad
Quad
Data out
4FRQDTR
4-byte Address
Fast Read
Quad I/O DTR
SPI
QPI
EEh
A
<31::24>
A
<23:16>
A
<15:8>
A
<7:0>
AXh(1), (2)
Quad
Quad
Data out
PP
Input Page
Program
(3-byte Address)
SPI
QPI
02h
A
<23:16>
A
<15:8>
A
<7:0>
PD
(256byte)
PP
Input Page
Program
(4-byte Address)
SPI
QPI
02h
A
<31::24>
A
<23:16>
A
<15:8>
A
<7:0>
PD
(256byte)
4PP
4-byte Address
Input Page
Program
SPI
QPI
12h
A
<31::24>
A
<23:16>
A
<15:8>
A
<7:0>
PD
(256byte)
PPQ
Quad Input
Page Program
(3-byte Address)
SPI
32h/38h
A
<23:16>
A
<15:8>
A
<7:0>
Quad PD
(256byte)
PPQ
Quad Input
Page Program
(4-byte Address)
SPI
32h/38h
A
<31::24>
A
<23:16>
A
<15:8>
A
<7:0>
Quad PD
(256byte)
4PPQ
4-byte Address
Quad Input
Page Program
SPI
34h/3Eh
A
<31::24>
A
<23:16>
A
<15:8>
A
<7:0>
Quad PD
(256byte)
SER
Sector Erase
(3-byte Address)
SPI
QPI
D7h/20h
A
<23:16>
A
<15:8>
A
<7:0>
SER
Sector Erase
(4-byte Address)
SPI
QPI
D7h/20h
A
<31::24>
A
<23:16>
A
<15:8>
A
<7:0>
SER
4-byte Address
Sector Erase
SPI
QPI
21h
A
<31::24>
A
<23:16>
A
<15:8>
A
<7:0>
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Byte6
40
IS25LP256, IS25WP256
Instruction
Name
Operation
Mode
Byte0
Byte1
Byte2
Byte3
BER32
(32KB)
Block Erase
32Kbyte
(3-byte Address)
SPI
QPI
52h
A
<23:16>
A
<15:8>
A
<7:0>
BER32
(32KB)
Block Erase
32Kbyte
(4-byte Address)
SPI
QPI
52h
A
<31::24>
A
<23:16>
A
<15:8>
A
<7:0>
4BER32
(32KB)
4-byte Address
Block Erase
32Kbyte
SPI
QPI
5Ch
A
<31::24>
A
<23:16>
A
<15:8>
A
<7:0>
BER64
(64KB)
Block Erase
64Kbyte
(3-byte Address)
SPI
QPI
D8h
A
<23:16>
A
<15:8>
A
<7:0>
BER64
(64KB)
Block Erase
64Kbyte
(4-byte Address)
SPI
QPI
D8h
A
<31::24>
A
<23:16>
A
<15:8>
A
<7:0>
BER64
(64KB)
4-byte Address
Block Erase
64Kbyte
SPI
QPI
DCh
A
<31::24>
A
<23:16>
A
<15:8>
A
<7:0>
CER
Chip Erase
SPI
QPI
C7h/60h
WREN
Write Enable
SPI
QPI
06h
WRDI
Write Disable
SPI
QPI
04h
RDSR
Read Status
Register
SPI
QPI
05h
Data out
WRSR
Write Status
Register
SPI
QPI
01h
Data in
RDFR
Read Function
Register
SPI
QPI
48h
Data out
WRFR
Write Function
Register
SPI
QPI
42h
Data in
QIOEN
Enter
QPI mode
SPI
35h
QIODI
Exit
QPI mode
QPI
F5h
PERSUS
Suspend during
program/erase
SPI
QPI
75h/B0h/
85h
PERRSM
Resume
program/erase
SPI
QPI
7Ah/30h/
8Ah
DP
Deep Power
Down
SPI
QPI
B9h
RDID,
RDPD
Read ID /
Release
Power Down
SPI
QPI
ABh
XXh(3)
XXh(3)
XXh(3)
ID7-ID0
SRPNV
Set Read
Parameters
(Non-Volatile)
SPI
QPI
65h
Data in
SRPV
Set Read
Parameters
(Volatile)
SPI
QPI
C0h/63h
Data in
SERPNV
Set Extended
Read Parameters
(Non-Volatile)
SPI
QPI
85h
Data in
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Byte4
Byte5
Byte6
41
IS25LP256, IS25WP256
Instruction
Name
Operation
Mode
Byte0
Byte1
SERPV
Set Extended
Read Parameters
(Volatile)
SPI
QPI
83h
Data in
RDRP
Read Read
Parameters
(Volatile)
SPI
QPI
61h
Data out
RDERP
Read Extended
Read Parameters
(Volatile)
SPI
QPI
81h
Data out
CLERP
Clear Extended
Read Register
SPI
QPI
82h
RDJDID
Read JEDEC
ID Command
SPI
9Fh
RDMDID
Read
Manufacturer
& Device ID
SPI
QPI
90h
Read JEDEC ID
QPI mode
QPI
AFh
RDJDIDQ
Byte2
Byte3
MF7-MF0
ID15-ID8
ID7-ID0
XXh(3)
XXh(3)
MF7-MF0
(4)
ID15-ID8
Byte5
00h
MF7-MF0
ID7-ID0
01h
ID7-ID0
MF7-MF0
Byte6
ID7-ID0
RDUID
Read
Unique ID
SPI
QPI
4Bh
A
<23:16>
A
<15:8>
A(4)
<7:0>
Dummy
Byte
Data out
RDSFDP
SFDP Read
SPI
QPI
5Ah
A
<23:16>
A
<15:8>
A
<7:0>
Dummy
Byte
Data out
NOP
No Operation
SPI
QPI
00h
RSTEN
Software
Reset
Enable
SPI
QPI
66h
RST
Software Reset
SPI
QPI
99h
IRER
Erase
Information
Row
SPI
QPI
64h
A
<23:16>
A
<15:8>
A
<7:0>
IRP
Program
Information
Row
SPI
QPI
62h
A
<23:16>
A
<15:8>
A
<7:0>
PD
(256byte)
IRRD
Read
Information
Row
SPI
QPI
68h
A
<23:16>
A
<15:8>
A
<7:0>
Dummy
Byte
SECUNLOCK
Sector Unlock
(3-byte Address)
SPI
QPI
26h
A
<23:16>
A
<15:8>
A
<7:0>
SECUNLOCK
Sector Unlock
(4-byte Address)
SPI
QPI
26h
A
<31::24>
A
<23:16>
A
<15:8>
A
<7:0>
4SECUNLOCK
4-byte Address
Sector Unlock
SPI
QPI
25h
A
<31::24>
A
<23:16>
A
<15:8>
A
<7:0>
SECLOCK
Sector Lock
SPI
QPI
24h
RDABR
Read AutoBoot
Register
SPI
QPI
14h
WRABR
Write AutoBoot
Register
SPI
QPI
15h
Data in 1
Data in 2
Data in 3
Data in 4
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(4)
Byte4
Data out
42
IS25LP256, IS25WP256
Instruction
Name
Operation
Mode
Byte0
Byte1
RDBR
Read Bank
Address Register
(Volatile)
SPI
QPI
16h/C8h
Data out
WRBRV
Write Bank
Address Register
(Volatile)
SPI
QPI
17h/C5h
Data in
WRBRNV
Write Bank
Address Register
(Non-Volatile)
SPI
QPI
18h
Data in
EN4B
Enter 4-byte
Address Mode
SPI
QPI
B7h
EX4B
Exit 4-byte
Address Mode
SPI
QPI
29h
RDDYB
Read DYB
(3-byte Address)
SPI
QPI
FAh
RDDYB
Read DYB
(4-byte Address)
SPI
QPI
4RDDYB
4-byte Address
Read DYB
WRDYB
Byte2
Byte3
Byte4
A
<23:16>
A
<15:8>
A
<7:0>
Data out
FAh
A
<31::24>
A
<23:16>
A
<15:8>
A
<7:0>
Data out
SPI
QPI
E0h
A
<31::24>
A
<23:16>
A
<15:8>
A
<7:0>
Data out
Write DYB
(3-byte Address)
SPI
QPI
FBh
A
<23:16>
A
<15:8>
A
<7:0>
Data in
WRDYB
Write DYB
(4-byte Address)
SPI
QPI
FBh
A
<31::24>
A
<23:16>
A
<15:8>
A
<7:0>
Data in
4WRDYB
4-byte Address
Write DYB
SPI
QPI
E1h
A
<31::24>
A
<23:16>
A
<15:8>
A
<7:0>
Data in
RDPPB
Read PPB
(3-byte Address)
SPI
FCh
A
<23:16>
A
<15:8>
A
<7:0>
Data out
RDPPB
Read PPB
(4-byte Address)
SPI
FCh
A
<31::24>
A
<23:16>
A
<15:8>
A
<7:0>
Data out
4RDPPB
4-byte Address
Read PPB
SPI
E2h
A
<31::24>
A
<23:16>
A
<15:8>
A
<7:0>
Data out
PGPPB
Program PPB
(Individually)
(3-byte Address)
SPI
QPI
FDh
A
<23:16>
A
<15:8>
A
<7:0>
PGPPB
Program PPB
(Individually)
(4-byte Address)
SPI
QPI
FDh
A
<31::24>
A
<23:16>
A
<15:8>
A
<7:0>
4PGPPB
4-byte Address
Program PPB
(Individually)
SPI
QPI
E3h
A
<31::24>
A
<23:16>
A
<15:8>
A
<7:0>
ERPPB
Erase PPB (as
a group)
SPI
QPI
E4h
RDASP
Read ASP
SPI
QPI
2Bh
Data out
(2 byte)
PGASP
Program ASP
SPI
QPI
2Fh
PD
(2 byte)
RDPLB
Read PPB Lock
Bit
SPI
QPI
A7h
Data out
WRPLB
Write PPB Lock
Bit
SPI
QPI
A6h
SFRZ
Set FREEZE bit
SPI
QPI
91h
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Rev.00A
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Byte5
Byte6
43
IS25LP256, IS25WP256
Instruction
Name
Operation
Mode
Byte0
Byte1
RDPWD
Read Password
SPI
QPI
E7h
Data out
(8 byte)
PGPWD
Program
Password
SPI
QPI
E8h
PD
(8 byte)
UNPWD
Unlock
Password
SPI
QPI
E9h
Data in
(8 byte)
GBLK
Set all DYB bits
(Gang Sector/
Block Lock)
SPI
QPI
7Eh
GBUN
Clear all DYB bits
(Gang Sector/
Block Unlock)
SPI
QPI
98h
Byte2
Byte3
Byte4
Byte5
Byte6
Notes:
1. The number of dummy cycles depends on the value setting in the Table 6.11 Read Dummy Cycles.
2. AXh has to be counted as a part of dummy cycles. X means “don’t care”.
3. XX means “don’t care”.
4. A<23:9> are “don’t care” and A<8:4> are always “0”.
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IS25LP256, IS25WP256
8.3 NORMAL READ OPERATION (NORD, 03h or 4NORD, 13h)
The Normal Read (NORD) instruction is used to read memory contents at a maximum frequency of 80MHz.
• 03h (EXTADD=0) is followed by a 3-byte address (A23-A0) or
• 03h (EXTADD=1) is followed by a 4-byte address (A31-A0) or
• 13h is followed by a 4-byte address (A31-A0)
The Normal Read instruction code is transmitted via the SI line, followed by three (A23 - A0) or four (A31 – A0)
address bytes of the first memory location to be read as above. A total of 24 or 32 address bits are shifted in,
but only AMSB (Most Significant Bit) - A0 are decoded. The remaining bits (A31 – AMSB+1) are ignored. The first byte
addressed can be at any memory location. Upon completion, any data on the SI will be ignored. Refer to Table
8.5 for the related Address Key.
The first byte data (D7 - D0) is shifted out on the SO line, MSB first. A single byte of data, or up to the whole
memory array, can be read out in one Normal Read instruction. The address is automatically incremented by
one after each byte of data is shifted out. The read operation can be terminated at any time by driving CE# high
(VIH) after the data comes out. When the highest address of the device is reached, the address counter will roll
over to the 000000h address, allowing the entire memory to be read in one continuous Read instruction.
If the Normal Read instruction is issued while an Erase, Program or Write operation is in process (WIP=1) the
instruction is ignored and will not have any effects on the current operation.
Table 8.5 Address Key
Mode
3 byte address
4 byte address
Address
AMSB–A0
256Mb
A23-A0
A24-A0 (A31-A25=X)
Note: X=Don’t Care
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IS25LP256, IS25WP256
Figure 8.1 Normal Read Sequence (03h [EXTADD=0], 3-byte address)
CE #
Mode 3 0
1
2
3
4
5
7
6
8
9
10
...
28
29
30
31
0
SCK
Mode 0
3-byte Address
SI
Instruction = 03h
23
22
...
21
3
2
1
45
46
47
High Impedance
SO
CE #
32
33
34
35
36
37
39
38
40
41
42
43
44
...
SCK
SI
Data Out 1
SO
tV
7
6
5
4
3
Data Out 2
2
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Rev.00A
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1
0
7
6
5
4
3
2
1
0
...
46
IS25LP256, IS25WP256
Figure 8.2 Normal Read Sequence (03h [EXTADD=1] or 13h, 4-byte address)
CE #
Mode 3 0
1
2
3
4
5
7
6
8
9
10
36
...
37
38
39
2
1
0
54
55
SCK
Mode 0
4-byte Address
SI
Instruction = 03h/13h
23
22
...
21
3
High Impedance
SO
CE #
40
41
42
43
44
45
47
46
48
49
50
51
52
53
...
SCK
SI
Data Out 1
SO
tV
7
6
5
4
3
Data Out 2
2
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Rev.00A
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1
0
7
6
5
4
3
2
1
0
...
47
IS25LP256, IS25WP256
8.4 FAST READ OPERATION (FRD, 0Bh or 4FRD, 0Ch)
The Fast Read (FRD, 4FRD) instruction is used to read memory data at up to a 166MHz clock.
• 0Bh (EXTADD=0) is followed by a 3-byte address (A23-A0) or
• 0Bh (EXTADD=1) is followed by a 4-byte address (A31-A0) or
• 0Ch is followed by a 4-byte address (A31-A0)
The Fast Read instruction code is followed by three or four address bytes as above and dummy cycles
(configurable, default is 8 clocks), transmitted via the SI line, with each bit latched-in during the rising edge of
SCK. Then the first data byte from the address is shifted out on the SO line, with each bit shifted out at a
maximum frequency fCT, during the falling edge of SCK.
The first byte addressed can be at any memory location. The address is automatically incremented by one after
each byte of data is shifted out. When the highest address is reached, the address counter will roll over to the
000000h address, allowing the entire memory to be read with a single Fast Read instruction. The Fast Read
instruction is terminated by driving CE# high (VIH).
If the Fast Read instruction is issued while an Erase, Program or Write cycle is in process (WIP=1) the
instruction is ignored without affecting the current cycle.
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IS25LP256, IS25WP256
Figure 8.3 Fast Read Sequence (0Bh [EXTADD=0], 3-byte address)
CE #
Mode 3 0
1
2
3
4
5
7
6
8
9
10
...
28
29
30
31
SCK
Mode 0
3-byte Address
SI
Instruction = 0Bh
31
30
41
42
29
...
3
2
1
0
44
45
46
47
...
High Impedance
SO
CE #
32
33
34
35
36
37
38
39
40
43
SCK
SI
Dummy Cycles
Data Out
tV
SO
7
6
5
4
3
2
1
0
...
Note: Dummy cycles depends on Read Parameter setting. Detailed information in Table 6.11 Read Dummy Cycles.
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IS25LP256, IS25WP256
Figure 8.4 Fast Read Sequence (0Bh [EXTADD=1] or 0Ch, 4-byte address)
CE #
Mode 3 0
1
2
3
4
5
7
6
8
9
10
...
36
37
38
39
SCK
Mode 0
4-byte Address
SI
Instruction = 0Bh/0Ch
31
30
49
50
29
...
3
2
1
0
52
53
54
55
...
High Impedance
SO
CE #
40
41
42
43
44
45
46
47
48
51
SCK
SI
Dummy Cycles
Data Out
tV
SO
7
6
5
4
3
2
1
0
...
Note: Dummy cycles depends on Read Parameter setting. Detailed information in Table 6.11 Read Dummy Cycles.
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IS25LP256, IS25WP256
FAST READ QPI OPERATION (FRD QPI, 0Bh or 4FRD QPI, 0Ch)
The Fast Read QPI (FRD QPI) instruction is used to read memory data at up to a 166MHz clock.
• 0Bh (EXTADD=0) is followed by a 3-byte address (A23-A0) or
• 0Bh (EXTADD=1) is followed by a 4-byte address (A31-A0) or
• 0Ch is followed by a 4-byte address (A31-A0)
The Fast Read QPI instruction code (2 clocks) is followed by three (6 clocks) or four (8 clocks) address bytes as
above and 6 dummy cycles (configurable, default is 6 clocks), transmitted via the IO3, IO2, IO1 and IO0 lines,
with each bit latched-in during the rising edge of SCK. Then the first data byte addressed is shifted out on the
IO3, IO2, IO1 and IO0 lines, with each bit shifted out at a maximum frequency fCT, during the falling edge of
SCK.
The first byte addressed can be at any memory location. The address is automatically incremented by one after
each byte of data is shifted out. When the highest address is reached, the address counter will roll over to the
000000h address, allowing the entire memory to be read with a single Fast Read QPI instruction. The Fast
Read QPI instruction is terminated by driving CE# high (VIH).
If the Fast Read QPI instruction is issued while an Erase, Program or Write cycle is in process (WIP=1) the
instruction is ignored without affecting the current cycle.
The Fast Read QPI sequence is also applied to the commands in the following table 8.6. However, only 3-byte
address mode QPI sequence is applied for RDUID, RDSFDP, and IRRD commands.
Table 8.6 Instructions that Fast Read QPI sequence is applied to
Instruction Name
Operation
Hex Code
FRQIO
Fast Read Quad I/O
EBh
RDUID
Read Unique ID
4Bh
SFDP Read
5Ah
Read Information Row
68h
RDSFDP
IRRD
Figure 8.5 Fast Read QPI Sequence (0Bh [EXTADD=0], 3-byte address)
CE#
Mode 3 0
1
2
3
4
5
6
7
8
9
...
13
14
15
16
17
...
SCK
Mode 0
tV
IO[3:0]
0Bh
Instruction
23:20 19:16 15:12 11:8
3-byte Address
7:4
3:0
7:4
6 Dummy Cycles
3:0
Data 1
7:4
3:0
Data 2
Note: Number of dummy cycles depends on Read Parameter setting. Detailed information in Table 6.11 Read
Dummy Cycles.
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...
IS25LP256, IS25WP256
Figure 8.6 Fast Read QPI Sequence (0Bh [EXTADD=1] or 0Ch, 4-byte address)
CE#
Mode 3 0
1
2
3
4
5
6
7
8
9
10
11
...
15
16
17
...
SCK
Mode 0
tV
IO[3:0]
0Bh/0Ch
Instruction
31:28 27:24 23:20 19:16 15:12 11:8
7:4
4-byte Address
3:0
7:4
6 Dummy Cycles
3:0
...
Data 1
Note: Number of dummy cycles depends on Read Parameter setting. Detailed information in Table 6.11 Read
Dummy Cycles.
8.5 HOLD OPERATION
HOLD# is used in conjunction with CE# to select the device. When the device is selected and a serial sequence
is underway, HOLD# can be used to pause the serial communication with the master device without resetting
the serial sequence. To pause, HOLD# is brought low while the SCK signal is low. To resume serial
communication, HOLD# is brought high while the SCK signal is low (SCK may still toggle during HOLD). Inputs
to SI will be ignored while SO is in the high impedance state, during HOLD.
Note: HOLD is not supported in DTR mode or with QE=1 or when RESET# is selected for the HOLD# or RESET# pin.
Timing graph can be referenced in AC Parameters Figure 9.4.
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IS25LP256, IS25WP256
8.6 FAST READ DUAL I/O OPERATION (FRDIO, BBh or 4FRDIO, BCh)
The Fast Read Dual I/O (FRDIO, 4FRDIO) instruction allows the address bits to be input two bits at a time. This
may allow for code to be executed directly from the SPI in some applications.
• BBh (EXTADD=0) is followed by a 3-byte address (A23-A0) or
• BBh (EXTADD=1) is followed by a 4-byte address (A31-A0) or
• BCh is followed by a 4-byte address (A31-A0)
The FRDIO/4FRDIO instruction code is followed by three or four address bytes as above and dummy cycles
(configurable, default is 4 clocks), transmitted via the IO1 and IO0 lines, with each pair of bits latched-in during
the rising edge of SCK. The address MSB is input on IO1, the next bit on IO0, and this shift pattern continues to
alternate between the two lines. Depending on the usage of AX read operation mode, a mode byte may be
located after address input.
The first data byte addressed is shifted out on the IO1 and IO0 lines, with each pair of bits shifted out at a
maximum frequency fCT, during the falling edge of SCK. The first bit (MSB) is output on IO1, while
simultaneously the second bit is output on IO0. Figures 8.7 and 8.8 illustrates the timing sequence.
The first byte addressed can be at any memory location. The address is automatically incremented by one after
each byte of data is shifted out. When the highest address is reached, the address counter will roll over to the
000000h address, allowing the entire memory to be read with a single FRDIO/4FRDIO instruction. The
FRDIO/4FRDIO instruction is terminated by driving CE# high (VIH).
The device supports the AX read operation by applying mode bits during dummy period. Mode bits consist of 8
bits, such as M7 to M0. Four cycles after address input are reserved for Mode bits in FRDIO/4FRDIO execution.
M7 to M4 are important for enabling this mode. M3 to M0 become don’t care for future use. When
M[7:4]=1010(Ah), it enables the AX read operation and subsequent FRDIO/4FRDIO execution skips command
code. It saves cycles as described in Figures 8.9 and 8.10. When the code is different from AXh (where X is
don’t care), the device exits the AX read operation. After finishing the read operation, device becomes ready to
receive a new command. SPI or QPI mode configuration retains the prior setting. Mode bit must be applied
during dummy cycles. Number of dummy cycles in Table 6.11 includes number of mode bit cycles. If dummy
cycles are configured as 4 cycles, data output will start right after mode bit is applied.
If the FRDIO/4FRDIO instruction is issued while an Erase, Program or Write cycle is in process (WIP=1) the
instruction is ignored and will not affect the current cycle.
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IS25LP256, IS25WP256
Figure 8.7 Fast Read Dual I/O Sequence (BBh [EXTADD=0], 3-byte address)
CE #
Mode 3 0
1
2
3
4
5
7
6
8
9
10
...
18
19
20
21
SCK
Mode 0
4 Dummy Cycles
3-byte Address
IO0
Instruction = BBh
22
20
18
...
2
0
6
4
23
21
19
...
3
1
7
5
High Impedance
IO1
Mode Bits
CE #
22
23
24
25
26
27
29
28
30
31
32
33
34
35
36
37
...
SCK
tV
IO0
2
0
6
4
2
0
6
Data Out 1
IO1
3
1
7
5
3
4
2
0
6
Data Out 2
1
7
5
3
4
2
0
6
4
...
1
7
5
...
Data Out 3
1
7
5
3
Mode Bits
Notes:
1. If the mode bits=AXh (where X is don’t care), it can execute the AX read mode (without command). When the
mode bits are different from AXh, the device exits the AX read operation.
2. Number of dummy cycles depends on clock speed. Detailed information in Table 6.11 Read Dummy Cycles.
3. Sufficient dummy cycles are required to avoid I/O contention. If the number of dummy cycles and AX bits cycles
are same, then X should be Hi-Z.
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IS25LP256, IS25WP256
Figure 8.8 Fast Read Dual I/O Sequence (BBh [EXTADD=1] or BCh, 4-byte address)
CE #
Mode 3 0
1
2
3
4
5
7
6
8
9
10
22
...
23
24
25
SCK
Mode 0
4 Dummy Cycles
4-byte Address
IO0
Instruction = BBh/BCh
22
20
18
...
2
0
6
4
23
21
19
...
3
1
7
5
High Impedance
IO1
Mode Bits
CE #
26
27
28
29
30
31
33
32
34
35
36
37
38
39
36
41
...
SCK
tV
IO0
2
0
6
4
2
0
6
Data Out 1
IO1
3
1
7
5
3
4
2
0
6
Data Out 2
1
7
5
3
4
2
0
6
4
...
1
7
5
...
Data Out 3
1
7
5
3
Mode Bits
Notes:
1. If the mode bits=AXh (where X is don’t care), it can execute the AX read mode (without command). When the
mode bits are different from AXh, the device exits the AX read operation.
2. Number of dummy cycles depends on clock speed. Detailed information in Table 6.11 Read Dummy Cycles.
3. Sufficient dummy cycles are required to avoid I/O contention. If the number of dummy cycles and AX bits cycles
are same, then X should be Hi-Z.
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IS25LP256, IS25WP256
Figure 8.9 Fast Read Dual I/O AX Read Sequence (BBh [EXTADD=0], 3-byte address)
CE #
Mode 3 0
1
2
3
...
11
12
13
14
15
16
17
18
19
20
...
21
SCK
Mode 0
4 Dummy Cycles
3-byte Address
tV
Data Out 2
Data Out 1
IO0
22
20
18
...
2
0
6
4
2
0
6
4
2
0
6
4
...
IO1
23
21
19
...
3
1
7
5
3
1
7
5
3
1
7
5
...
Mode Bits
Notes:
1. If the mode bits=AXh (where X is don’t care), it will keep executing the AX read mode (without command). When
the mode bits are different from AXh, the device exits the AX read operation.
2. Number of dummy cycles depends on clock speed. Detailed information in Table 6.11 Read Dummy Cycles.
3. Sufficient dummy cycles are required to avoid I/O contention. If the number of dummy cycles and AX bits cycles
are same, then X should be Hi-Z.
Figure 8.10 Fast Read Dual I/O AX Read Sequence (BBh [EXTADD=1] or BCh, 4-byte address)
CE #
Mode 3 0
1
2
3
...
15
16
17
18
19
20
21
22
23
24
...
25
SCK
Mode 0
4 Dummy Cycles
4-byte Address
tV
Data Out 2
Data Out 1
IO0
30
28
26
...
2
0
6
4
2
0
6
4
2
0
6
4
...
IO1
31
29
27
...
3
1
7
5
3
1
7
5
3
1
7
5
...
Mode Bits
Notes:
1. If the mode bits=AXh (where X is don’t care), it will keep executing the AX read mode (without command). When
the mode bits are different from AXh, the device exits the AX read operation.
2. Number of dummy cycles depends on clock speed. Detailed information in Table 6.11 Read Dummy Cycles.
3. Sufficient dummy cycles are required to avoid I/O contention. If the number of dummy cycles and AX bits cycles
are same, then X should be Hi-Z.
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IS25LP256, IS25WP256
8.7 FAST READ DUAL OUTPUT OPERATION (FRDO, 3Bh or 4FRDO, 3Ch)
The FRDO/4FRDO instruction is used to read memory data on two output pins each at up to a 166MHz clock.
• 3Bh (EXTADD=0) is followed by a 3-byte address (A23-A0) or
• 3Bh (EXTADD=1) is followed by a 4-byte address (A31-A0) or
• 3Ch is followed by a 4-byte address (A31-A0)
The FRDO/4FRDO instruction code is followed by three or four address bytes as above and dummy cycles
(configurable, default is 8 clocks), transmitted via the IO0 line, with each bit latched-in during the rising edge of
SCK. Then the first data byte addressed is shifted out on the IO1 and IO0 lines, with each pair of bits shifted out
at a maximum frequency f CT, during the falling edge of SCK. The first bit (MSB) is output on IO1.
Simultaneously, the second bit is output on IO0.
The first byte addressed can be at any memory location. The address is automatically incremented by one after
each byte of data is shifted out. When the highest address is reached, the address counter will roll over to the
000000h address, allowing the entire memory to be read with a single FRDO/4FRDO instruction. The instruction
FRDO/4FRDO is terminated by driving CE# high (VIH).
If the FRDO/4FRDO instruction is issued while an Erase, Program or Write cycle is in process (WIP=1) the
instruction is ignored and will not have any effects on the current cycle.
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IS25LP256, IS25WP256
Figure 8.11 Fast Read Dual Output Sequence (3Bh [EXTADD=0], 3-byte address)
CE #
Mode 3 0
1
2
3
4
5
7
6
8
9
10
...
28
29
30
31
SCK
Mode 0
3-byte Address
IO0
Instruction = 3Bh
23
22
41
42
21
...
3
2
1
0
44
45
46
47
...
High Impedance
IO1
CE #
32
33
34
35
36
37
38
39
40
43
SCK
tV
IO0
6
2
0
6
Data Out 1
8 Dummy Cycles
IO1
4
7
5
3
4
2
0
...
1
...
Data Out 2
1
7
5
3
Note: Dummy cycles depends on Read Parameter setting. Detailed information in Table 6.11 Read Dummy Cycles.
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IS25LP256, IS25WP256
Figure 8.12 Fast Read Dual Output Sequence (3Bh [EXTADD=1] or 3Ch, 4-byte address)
CE #
Mode 3 0
1
2
3
4
5
7
6
8
9
10
...
36
37
38
39
SCK
Mode 0
4-byte Address
IO0
Instruction = 3Bh/3Ch
23
22
49
50
21
...
3
2
1
0
52
53
54
55
...
High Impedance
IO1
CE #
40
41
42
43
44
45
46
47
48
51
SCK
tV
IO0
6
2
0
6
Data Out 1
8 Dummy Cycles
IO1
4
7
5
3
4
2
0
...
1
...
Data Out 2
1
7
5
3
Note: Dummy cycles depends on Read Parameter setting. Detailed information in Table 6.11 Read Dummy Cycles.
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IS25LP256, IS25WP256
8.8 FAST READ QUAD OUTPUT OPERATION (FRQO, 6Bh or 4FRQO 6Ch)
The FRQO/4FRQO instruction is used to read memory data on four output pins each at up to a 166
MHz clock.
• 6Bh (EXTADD=0) is followed by a 3-byte address (A23-A0) or
• 6Bh (EXTADD=1) is followed by a 4-byte address (A31-A0) or
• 6Ch is followed by a 4-byte address (A31-A0)
The FRQO/4FRQO instruction code is followed by three or four address bytes as above and dummy
cycles (configurable, default is 8 clocks), transmitted via the IO0 line, with each bit latched-in during the
rising edge of SCK. Then the first data byte addressed is shifted out on the IO3, IO2, IO1 and IO0 lines,
with each group of four bits shifted out at a maximum frequency fCT, during the falling edge of SCK. The
first bit (MSB) is output on IO3, while simultaneously the second bit is output on IO2, the third bit is
output on IO1, etc.
The first byte addressed can be at any memory location. The address is automatically incremented
after each byte of data is shifted out. When the highest address is reached, the address counter will roll
over to the 000000h address, allowing the entire memory to be read with a single FRQO/4FRQO
instruction. FRQO/4FRQO instruction is terminated by driving CE# high (VIH).
If a FRQO/4FRQO instruction is issued while an Erase, Program or Write cycle is in process (WIP=1)
the instruction is ignored and will not have any effects on the current cycle.
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IS25LP256, IS25WP256
Figure 8.13 Fast Read Quad Output Sequence (6Bh [EXTADD=0], 3-byte address)
CE #
Mode 3 0
1
2
3
4
5
7
6
8
9
10
...
28
29
30
31
SCK
Mode 0
3-byte Address
IO0
Instruction = 6Bh
23
22
41
42
21
...
3
2
1
0
44
45
46
47
...
High Impedance
IO1
High Impedance
IO2
High Impedance
IO3
CE #
32
33
34
35
36
37
38
39
40
43
SCK
tV
IO0
4
8 Dummy Cycles
0
4
0
4
0
4
0
...
Data Out 1 Data Out 2 Data Out 3 Data Out 4
IO1
5
1
5
1
5
1
5
1
...
IO2
6
2
6
2
6
2
6
2
...
IO3
7
3
7
3
7
3
7
3
...
Note: Dummy cycles depends on Read Parameter setting. Detailed information in Table 6.11 Read Dummy Cycles.
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Figure 8.14 Fast Read Quad Output Sequence (6Bh [EXTADD=1] or 6Ch, 4-byte address)
CE #
Mode 3 0
1
2
3
4
5
7
6
8
9
10
...
36
37
38
39
SCK
Mode 0
4-byte Address
IO0
Instruction = 6Bh/6Ch
31
30
29
...
3
2
1
0
52
53
54
55
...
High Impedance
IO1
High Impedance
IO2
High Impedance
IO3
CE #
40
41
42
43
44
45
46
47
48
49
50
51
SCK
tV
IO0
4
8 Dummy Cycles
0
4
0
4
0
4
0
...
Data Out 1 Data Out 2 Data Out 3 Data Out 4
IO1
5
1
5
1
5
1
5
1
...
IO2
6
2
6
2
6
2
6
2
...
IO3
7
3
7
3
7
3
7
3
...
Note: Dummy cycles depends on Read Parameter setting. Detailed information in Table 6.11 Read Dummy Cycles.
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IS25LP256, IS25WP256
8.9 FAST READ QUAD I/O OPERATION (FRQIO, EBh or 4FRQIO, ECh)
The FRQIO/4FRQIO instruction allows the address bits to be input four bits at a time. This may allow for code to
be executed directly from the SPI in some applications.
• EBh (EXTADD=0) is followed by a 3-byte address (A23-A0) or
• EBh (EXTADD=1) is followed by a 4-byte address (A31-A0) or
• ECh is followed by a 4-byte address (A31-A0)
The FRQIO/4FRQIO instruction code is followed by three or four address bytes as above and dummy cycles
(configurable, default is 6 clocks), transmitted via the IO3, IO2, IO1 and IO0 lines, with each group of four bits
latched-in during the rising edge of SCK. The address of MSB inputs on IO3, the next bit on IO2, the next bit on
IO1, the next bit on IO0, and continue to shift in alternating on the four. Depending on the usage of AX read
operation mode, a mode byte may be located after address input.
The first data byte addressed is shifted out on the IO3, IO2, IO1 and IO0 lines, with each group of four bits
shifted out at a maximum frequency fCT, during the falling edge of SCK. The first bit (MSB) is output on IO3,
while simultaneously the second bit is output on IO2, the third bit is output on IO1, etc. Figures 8.15 and 8.16
illustrates the timing sequence.
The first byte addressed can be at any memory location. The address is automatically incremented after each
byte of data is shifted out. When the highest address is reached, the address counter will roll over to the
000000h address, allowing the entire memory to be read with a single FRQIO/4FRQIO instruction.
FRQIO/4FRQIO instruction is terminated by driving CE# high (VIH).
The device supports the AX read operation by applying mode bits during dummy period. Mode bits consist of 8
bits, such as M7 to M0. Two cycles after address input are reserved for Mode bits in FRQIO/4FRQIO execution.
M7 to M4 are important for enabling this mode. M3 to M0 become don’t care for future use. When
M[7:4]=1010(Ah), it enables the AX read operation and subsequent FRQIO/4FRQIO execution skips command
code. It saves cycles as described in Figures 8.17 and 8.18. When the code is different from AXh (where X is
don’t care), the device exits the AX read operation. After finishing the read operation, device becomes ready to
receive a new command. SPI or QPI mode configuration retains the prior setting. Mode bit must be applied
during dummy cycles. Number of dummy cycles in Table 6.11 includes number of mode bit cycles. If dummy
cycles are configured as 6 cycles, data output will start right after mode bits and 4 additional dummy cycles are
applied.
If the FRQIO/4FRQIO instruction is issued while an Erase, Program or Write cycle is in process (WIP=1) the
instruction is ignored and will not have any effects on the current cycle.
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IS25LP256, IS25WP256
Figure 8.15 Fast Read Quad I/O Sequence (EBh [EXTADD=0], 3-byte address)
CE #
Mode 3 0
1
2
3
4
5
7
6
8
9
10
11
12
13
14
15
SCK
Mode 0
3-byte Address
IO0
20
16
12
8
4
0
4
0
21
17
13
9
5
1
5
1
IO2
22
18
14
10
6
2
6
2
IO3
23
19
15
11
7
3
7
3
Instruction = EBh
High Impedance
IO1
Mode Bits
CE #
16
17
18
19
20
21
23
22
24
25
26
27
28
29
30
31
...
SCK
6 Dummy Cycles
tV Data Out 1 Data Out 2 Data Out 3 Data Out 4 Data Out 5 Data Out 6
IO0
4
0
4
0
4
0
4
0
4
0
4
0
...
IO1
5
1
5
1
5
1
5
1
5
1
5
1
...
6
2
6
2
6
2
6
2
6
2
6
2
...
7
3
7
3
7
3
7
3
7
3
7
3
...
IO2
IO3
Notes:
1. If the mode bits=AXh (where X is don’t care), it can execute the AX read mode (without command). When the
mode bits are different from AXh, the device exits the AX read operation.
2. Number of dummy cycles depends on clock speed. Detailed information in Table 6.11 Read Dummy Cycles.
3. Sufficient dummy cycles are required to avoid I/O contention. If the number of dummy cycles and AX bits cycles
are same, then X should be Hi-Z.
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IS25LP256, IS25WP256
Figure 8.16 Fast Read Quad I/O Sequence (EBh [EXTADD=1] or ECh, 4-byte address)
CE #
Mode 3 0
1
2
3
4
5
7
6
8
9
10
11
12
13
14
15
SCK
Mode 0
4-byte Address
IO0
28
24
20
16
12
8
4
0
29
25
21
17
13
9
5
1
IO2
30
26
22
18
14
10
6
2
IO3
31
27
23
19
15
11
7
3
25
26
27
28
29
30
31
...
Instruction = EBh/ECh
High Impedance
IO1
CE #
16
17
18
19
20
21
23
22
24
SCK
6 Dummy Cycles
tV Data Out 1 Data Out 2 Data Out 3 Data Out 4 Data Out 5
IO0
4
0
4
0
4
0
4
0
4
0
4
0
...
IO1
5
1
5
1
5
1
5
1
5
1
5
1
...
6
2
6
2
6
2
6
2
6
2
6
2
...
7
3
7
3
7
3
7
3
7
3
7
3
...
IO2
IO3
Mode Bits
Notes:
1. If the mode bits=AXh (where X is don’t care), it can execute the AX read mode (without command). When the
mode bits are different from AXh, the device exits the AX read operation.
2. Number of dummy cycles depends on clock speed. Detailed information in Table 6.11 Read Dummy Cycles.
3. Sufficient dummy cycles are required to avoid I/O contention. If the number of dummy cycles and AX bits cycles
are same, then X should be Hi-Z.
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IS25LP256, IS25WP256
Figure 8.17 Fast Read Quad I/O AX Read Sequence (EBh [EXTADD=0], 3-byte address)
CE #
Mode 3 0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
...
15
SCK
Mode 0
6 Dummy Cycles
3-byte Address
tV
Data Out 1 Data Out 2
IO0
20
16
12
8
4
0
4
0
4
0
4
0
...
IO1
21
17
13
9
5
1
5
1
5
1
5
1
...
IO2
22
18
14
10
6
2
6
2
6
2
6
2
...
IO3
23
19
15
11
7
3
7
3
7
3
7
3
...
Mode Bits
Notes:
1. If the mode bits=AXh (where X is don’t care), it will keep executing the AX read mode (without command). When
the mode bits are different from AXh, the device exits the AX read operation.
2. Number of dummy cycles depends on clock speed. Detailed information in Table 6.11 Read Dummy Cycles.
3. Sufficient dummy cycles are required to avoid I/O contention. If the number of dummy cycles and AX bits cycles
are same, then X should be Hi-Z.
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Figure 8.18 Fast Read Quad I/O AX Read Sequence (EBh [EXTADD=1] or ECh, 4-byte address)
CE #
Mode 3 0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
...
15
SCK
Mode 0
6 Dummy Cycles
4-byte Address
tV
Data Out 1
IO0
28
24
20
16
12
8
4
0
4
0
4
0
...
IO1
29
25
21
17
13
9
5
1
5
1
5
1
...
IO2
30
26
22
18
14
10
6
2
6
2
6
2
...
IO3
31
27
23
19
15
11
7
3
7
3
7
3
...
Mode Bits
Notes:
1. If the mode bits=AXh (where X is don’t care), it will keep executing the AX read mode (without command). When
the mode bits are different from AXh, the device exits the AX read operation.
2. Number of dummy cycles depends on clock speed. Detailed information in Table 6.11 Read Dummy Cycles.
3. Sufficient dummy cycles are required to avoid I/O contention. If the number of dummy cycles and AX bits cycles
are same, then X should be Hi-Z.
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FAST READ QUAD I/O QPI OPERATION (FRQIO QPI, EBh or 4FRQIO QPI, ECh)
The FRQIO/4FRQIO QPI instruction is used to read memory data at up to a 166MHz clock.
The FRQIO/4FRQIO QPI instruction utilizes all four IO lines to input the instruction code so that only two clocks
are required, while the FRQIO/4FRQIO instruction requires that the byte-long instruction code is shifted into the
device only via IO0 line in eight clocks. As a result, 6 command cycles will be reduced by the FRQIO/4FRQIO
QPI instruction. In addition, subsequent address and data out are shifted in/out via all four IO lines like the
FRQIO/4FRQIO instruction. In fact, except for the command cycle, the FRQIO/4FRQIO QPI operation is exactly
same as the FRQIO/4FRQIO. A Quad Enable (QE) bit of Status Register must be set to "1" before sending the
FRQIO/4FRQIO QPI instruction.
The device supports the AX read operation by applying mode bits during dummy period. Mode bits consist of 8
bits, such as M7 to M0. Two cycles after address input are reserved for Mode bits in FRQIO/4FRQIO execution.
M7 to M4 are important for enabling this mode. M3 to M0 become don’t care for future use. When
M[7:4]=1010(Ah), it enables the AX read operation and subsequent FRQIO/4FRQIO execution skips command
code. It saves cycles as described in Figures 8.17 and 8.18. When the code is different from AXh (where X is
don’t care), the device exits the AX read operation. After finishing the read operation, device becomes ready to
receive a new command. SPI or QPI mode configuration retains the prior setting. Mode bit must be applied
during dummy cycles. Number of dummy cycles in Table 6.11 includes number of mode bit cycles. If dummy
cycles are configured as 6 cycles, data output will start right after mode bits and 4 additional dummy cycles are
applied.
If the FRQIO/4FRQIO QPI instruction is issued while an Erase, Program or Write cycle is in process (WIP=1)
the instruction is ignored and will not have any effects on the current cycle.
Figure 8.19 Fast Read Quad I/O QPI Sequence (EBh [EXTADD=0], 3-byte address)
CE#
Mode 3 0
1
2
3
4
5
6
7
8
9
...
13
14
15
16
17
...
SCK
Mode 0
Mode Bits
IO[3:0]
EBh
Instruction
23:20 19:16 15:12 11:8
3-byte Address
7:4
3:0
7:4
3:0
6 Dummy Cycles
tV
7:4
3:0
Data 1
7:4
3:0
...
Data 2
Notes:
1. If the mode bits=AXh (where X is don’t care), it can execute the AX read mode (without command). When the
mode bits are different from AXh, the device exits the AX read operation.
2. Number of dummy cycles depends on Read Parameter setting. Detailed information in Table 6.11 Read Dummy
Cycles.
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Figure 8.20 Fast Read Quad I/O QPI Sequence (EBh [EXTADD=1] or ECh, 4-byte address)
CE#
Mode 3 0
1
2
3
4
5
6
7
8
9
10
11
...
15
16
17
...
SCK
Mode 0
Mode Bits
IO[3:0]
EBh/ECh 31:28 27:24 23:20 18:16 15:12 11:8
Instruction
4-byte Address
7:4
3:0
7:4
3:0
6 Dummy Cycles
tV
7:4
3:0
...
Data 1
Notes:
1. If the mode bits=AXh (where X is don’t care), it can execute the AX read mode (without command). When the
mode bits are different from AXh, the device exits the AX read operation.
2. Number of dummy cycles depends on Read Parameter setting. Detailed information in Table 6.11 Read Dummy
Cycles.
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IS25LP256, IS25WP256
8.10 PAGE PROGRAM OPERATION (PP, 02h or 4PP, 12h)
The Page Program (PP/4PP) instruction allows up to 256 bytes data to be programmed into memory in a single
operation. The destination of the memory to be programmed must be outside the protected memory area set by
the Block Protection bits (BP3, BP2, BP1, BP0) or ASP. A PP/4PP instruction which attempts to program into a
page that is write-protected will be ignored. Before the execution of PP/4PP instruction, the Write Enable Latch
(WEL) must be enabled through a Write Enable (WREN) instruction.
• 02h (EXTADD=0) is followed by a 3-byte address (A23-A0) or
• 02h (EXTADD=1) is followed by a 4-byte address (A31-A0) or
• 12h is followed by a 4-byte address (A31-A0)
The PP/4PP instruction code, three or four address bytes as above and program data (1 to 256 bytes) are input
via the SI line. Program operation will start immediately after the CE# is brought high, otherwise the PP/4PP
instruction will not be executed. The internal control logic automatically handles the programming voltages and
timing. During a program operation, all instructions will be ignored except the RDSR instruction. The progress or
completion of the program operation can be determined by reading the WIP bit. If the WIP bit is “1”, the program
operation is still in progress. If WIP bit is “0”, the program operation has completed.
If more than 256 bytes data are sent to a device, the address counter rolls over within the same page, the
previously latched data are discarded, and the last 256 bytes are kept to be programmed into the page. The
starting byte can be anywhere within the page. When the end of the page is reached, the address will wrap
around to the beginning of the same page. If the data to be programmed are less than a full page, the data of all
other bytes on the same page will remain unchanged.
Note: A program operation can alter “1”s into “0”s, but an erase operation is required to change “0”s back to “1”s.
A byte cannot be reprogrammed without first erasing the whole sector or block.
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Figure 8.21 Page Program Sequence (02h [EXTADD=0], 3-byte address)
1
...
7
8
9
...
31
32
33
...
39
...
...
2079
Mode 3 0
2072
CE #
SCK
Mode 0
SI
Data In 1
3-byte Address
Instruction = 02h
23
22
...
0
7
6
...
Data In 256
0
...
7
...
0
High Impedance
SO
Figure 8.22 Page Program QPI Sequence (02h [EXTADD=0], 3-byte address)
CE#
Mode 3 0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
...
7:4
3:0
7:4
3:0
7:4
3:0
7:4
3:0
7:4
3:0
...
SCK
Mode 0
IO[3:0]
02h
23:20 19:16 15:12 11:8
3-byte Address
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Data In 2
Data In 3
Data In 4
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IS25LP256, IS25WP256
Figure 8.23 Page Program Sequence (02h [EXTADD=1] or 12h, 4-byte address)
1
...
7
8
9
...
39
40
41
...
47
...
...
2087
Mode 3 0
2080
CE #
SCK
Mode 0
SI
Data In 1
4-byte Address
Instruction = 02h/12h
31
30
...
0
7
6
...
Data In 256
0
...
7
...
0
High Impedance
SO
Figure 8.24 Page Program QPI Sequence (02h [EXTADD=1] or 12h, 4-byte address)
CE#
Mode 3 0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
...
7:4
3:0
7:4
3:0
7:4
3:0
7:4
3:0
...
SCK
Mode 0
IO[3:0]
02h/12h
31:28 27:24 23:20 19:16 15:12 11:8
4-byte Address
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Data In 2
Data In 3
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IS25LP256, IS25WP256
8.11 QUAD INPUT PAGE PROGRAM OPERATION (PPQ, 32h/38h or 4PPQ, 34h/3Eh)
The Quad Input Page Program instruction allows up to 256 bytes data to be programmed into memory in a
single operation with four pins (IO0, IO1, IO2 and IO3). The destination of the memory to be programmed must
be outside the protected memory area set by the Block Protection (BP3, BP2, BP1, BP0) bits or ASP. A Quad
Input Page Program instruction which attempts to program into a page that is write-protected will be ignored.
Before the execution of Quad Input Page Program instruction, the QE bit in the Status Register must be set to “1”
and the Write Enable Latch (WEL) must be enabled through a Write Enable (WREN) instruction.
• 32h/38h (EXTADD=0) is followed by a 3-byte address (A23-A0) or
• 32h/38h (EXTADD=1) is followed by a 4-byte address (A31-A0) or
• 34h/3Eh is followed by a 4-byte address (A31-A0)
The Quad Input Page Program instruction code, three or four address bytes as above and program data (1 to
256 bytes) are input via the four pins (IO0, IO1, IO2 and IO3). Program operation will start immediately after the
CE# is brought high, otherwise the Quad Input Page Program instruction will not be executed. The internal
control logic automatically handles the programming voltages and timing. During a program operation, all
instructions will be ignored except the RDSR instruction. The progress or completion of the program operation
can be determined by reading the WIP bit. If the WIP bit is “1”, the program operation is still in progress. If WIP
bit is “0”, the program operation has completed.
If more than 256 bytes data are sent to a device, the address counter rolls over within the same page, the
previously latched data are discarded, and the last 256 bytes data are kept to be programmed into the page.
The starting byte can be anywhere within the page. When the end of the page is reached, the address will wrap
around to the beginning of the same page. If the data to be programmed are less than a full page, the data of all
other bytes on the same page will remain unchanged.
Note: A program operation can alter “1”s into “0”s, but an erase operation is required to change “0”s back to “1”s.
A byte cannot be reprogrammed without first erasing the whole sector or block.
Figure 8.25 Quad Input Page Program operation (32h/38h [EXTADD=0], 3-byte address)
CE #
Mode 3 0
1
2
3
4
5
6
7
8
9
...
31
32
33
34
35
...
SCK
Mode 0
3-byte Address
Data In 1
Data In 2
4
0
4
0
...
5
1
5
1
...
IO2
6
2
6
2
...
IO3
7
3
7
3
...
IO0
IO1
Instruction = 32h/38h
High Impedance
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22
...
0
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IS25LP256, IS25WP256
Figure 8.26 Quad Input Page Program operation (32h/38h [EXTADD=1] or 34h/3Eh, 4-byte address)
CE #
Mode 3 0
1
2
3
4
5
6
7
8
9
...
39
40
41
42
43
...
SCK
Mode 0
4-byte Address
Data In 1
Data In 2
4
0
4
0
...
5
1
5
1
...
IO2
6
2
6
2
...
IO3
7
3
7
3
...
IO0
IO1
Instruction = 32h/38h/34h/3Eh
High Impedance
31
30
...
0
8.12 ERASE OPERATION
The memory array of the device is organized into uniform 4 Kbyte sectors or 32/64 Kbyte uniform blocks (a
block consists of eight/sixteen adjacent sectors respectively).
Before a byte is reprogrammed, the sector or block that contains the byte must be erased (erasing sets bits to
“1”). In order to erase the device, there are three erase instructions available: Sector Erase (SER), Block Erase
(BER), and Chip Erase (CER). A sector erase operation allows any individual sector to be erased without
affecting the data in other sectors. A block erase operation erases any individual block. A chip erase operation
erases the whole memory array of a device. A sector erase, block erase, or chip erase operation can be
executed prior to any programming operation.
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8.13 SECTOR ERASE OPERATION (SER, D7h/20h or 4SER, 21h)
A Sector Erase (SER/4SER) instruction erases a 4 Kbyte sector before the execution of a SER/4SER
instruction, the Write Enable Latch (WEL) must be set via a Write Enable (WREN) instruction. The WEL bit is
automatically reset after the completion of Sector Erase operation.
• D7h/20h (EXTADD=0) is followed by a 3-byte address (A23-A0) or
• D7h/20h (EXTADD=1) is followed by a 4-byte address (A31-A0) or
• 21h is followed by a 4-byte address (A31-A0)
A SER/4SER instruction is entered, after CE# is pulled low to select the device and stays low during the entire
instruction sequence The SER/4SER instruction code, and three or four address bytes as above are input via
SI. Erase operation will start immediately after CE# is pulled high. The internal control logic automatically
handles the erase voltage and timing.
During an erase operation, all instruction will be ignored except Read Status Register, Read Extended Read
Register, Erase/Program Suspend, and Software/Hardware Reset instructions. The progress or completion of
the erase operation can be determined by reading the WIP bit. If the WIP bit is “1”, the erase operation is still in
progress. If the WIP bit is “0”, the erase operation has been completed.
Figure 8.27 Sector Erase Sequence (D7h/20h [EXTADD=0], 3-byte address)
CE #
Mode 3 0
1
2
3
4
5
6
7
8
9
10
...
28
29
30
31
1
0
SCK
Mode 0
3-byte Address
SI
SO
Instruction = D7h/20h
23
22
21
...
3
2
High Impedance
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Figure 8.28 Sector Erase Sequence (D7h/20h [EXTADD=1] or 21h, 4-byte address)
CE #
Mode 3 0
1
2
3
4
5
6
7
8
9
10
...
36
37
38
39
1
0
SCK
Mode 0
4-byte Address
SI
Instruction = D7h/20h/21h
31
30
29
...
3
2
High Impedance
SO
Figure 8.29 Sector Erase QPI Sequence (D7h/20h [EXTADD=0], 3-byte address)
CE#
Mode 3 0
1
2
3
4
5
6
7
7:4
3:0
SCK
Mode 0
3-byte Address
D7h/20h
IO[3:0]
23:20 19:16 15:12 11:8
Figure 8.30 Sector Erase QPI Sequence (D7h/20h [EXTADD=1] or 21h, 4-byte address)
CE#
Mode 3 0
1
2
3
4
5
6
7
8
9
7:4
3:0
SCK
Mode 0
IO[3:0]
4-byte Address
D7h/
20h/21h
31:28 27:24 23:20 19:16 15:12 11:8
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8.14 BLOCK ERASE OPERATION (BER32K:52h or 4BER32K:5Ch, BER64K:D8h or 4BER64K:DCh)
A Block Erase (BER) instruction erases a 32/64 Kbyte block. Before the execution of a BER instruction, the
Write Enable Latch (WEL) must be set via a Write Enable (WREN) instruction. The WEL is reset automatically
after the completion of a block erase operation.
• 52h/D8h (EXTADD=0) is followed by a 3-byte address (A23-A0) or
• 52h/D8h (EXTADD=1) is followed by a 4-byte address (A31-A0) or
• 5Ch/DCh is followed by a 4-byte address (A31-A0)
The BER instruction code and three or four address bytes as above are input via SI. Erase operation will start
immediately after the CE# is pulled high, otherwise the BER instruction will not be executed. The internal control
logic automatically handles the erase voltage and timing.
Figure 8.31 Block Erase (64K) Sequence (D8h [EXTADD=0], 3-byte address)
CE #
Mode 3 0
1
2
3
4
5
6
7
8
9
10
...
28
29
30
31
2
1
0
37
38
39
2
1
0
SCK
Mode 0
3-byte Address
SI
Instruction = D8h
23
22
21
...
3
High Impedance
SO
Figure 8.32 Block Erase (64K) Sequence (D8h [EXTADD=1] or DCh, 4-byte address)
CE #
Mode 3 0
1
2
3
4
5
6
7
8
9
10
...
36
SCK
Mode 0
4-byte Address
SI
SO
Instruction = D8h/DCh
31
29
28
...
3
High Impedance
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Figure 8.33 Block Erase (64K) QPI Sequence (D8h [EXTADD=0], 3-byte address)
CE#
Mode 3 0
1
2
3
4
5
6
7
7:4
3:0
SCK
Mode 0
3-byte Address
D8h
IO[3:0]
23:20 19:16 15:12 11:8
Figure 8.34 Block Erase (64K) QPI Sequence (D8h [EXTADD=1] or DCh, 4-byte address)
CE#
Mode 3 0
1
2
3
4
5
6
7
8
9
7:4
3:0
SCK
Mode 0
4-byte Address
D8h/DCh
IO[3:0]
31:28 27:24 23:20 19:16 15:12 11:8
Figure 8.35 Block Erase (32K) Sequence (52h [EXTADD=0], 3-byte address)
CE #
Mode 3 0
1
2
3
4
5
6
7
8
9
10
...
28
29
30
31
2
1
0
SCK
Mode 0
3-byte Address
SI
SO
Instruction = 52h
23
22
21
...
3
High Impedance
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Figure 8.36 Block Erase (32K) Sequence (52h [EXTADD=1] or 5Ch, 4-byte address)
CE #
Mode 3 0
1
2
3
4
5
6
7
8
9
10
...
36
37
38
39
2
1
0
SCK
Mode 0
4-byte Address
SI
Instruction = 52h/5Ch
31
29
28
...
3
High Impedance
SO
Figure 8.37 Block Erase (32K) QPI Sequence (52h [EXTADD=0], 3-byte address)
CE#
Mode 3 0
1
2
3
4
5
6
7
7:4
3:0
SCK
Mode 0
3-byte Address
52h
IO[3:0]
23:20 19:16 15:12 11:8
Figure 8.38 Block Erase (32K) QPI Sequence (52h [EXTADD=1] or 5Ch, 4-byte address)
CE#
Mode 3 0
1
2
3
4
5
6
7
8
9
7:4
3:0
SCK
Mode 0
IO[3:0]
4-byte Address
52h/5Ch
31:28 27:24 23:20 19:16 15:12 11:8
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8.15 CHIP ERASE OPERATION (CER, C7h/60h)
A Chip Erase (CER) instruction erases the entire memory array. Before the execution of CER instruction, the
Write Enable Latch (WEL) must be set via a Write Enable (WREN) instruction. The WEL is automatically reset
after completion of a chip erase operation.
The CER instruction code is input via the SI. Erase operation will start immediately after CE# is pulled high,
otherwise the CER instruction will not be executed. The internal control logic automatically handles the erase
voltage and timing.
Figure 8.39 Chip Erase Sequence
CE#
Mode 3
0
1
2
3
4
5
6
7
SCK
Mode 0
SI
Instruction = C7h/60h
SO
High Impedance
Figure 8.40 Chip Erase QPI Sequence
CE#
Mode 3 0
1
SCK
Mode 0
IO[3:0]
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8.16 WRITE ENABLE OPERATION (WREN, 06h)
The Write Enable (WREN) instruction is used to set the Write Enable Latch (WEL) bit. The WEL bit is reset to
the write-protected state after power-up. The WEL bit must be write enabled before any write operation,
including Sector Erase, Block Erase, Chip Erase, Page Program, Program Information Row, Write Status
Register, Write Function Register, Set Non-Volatile Read Register, Set Non-Volatile Extended Read Register,
and Write Autoboot Register operations except for Set Volatile Read Register and Set Volatile Extended Read
Register. The WEL bit will be reset to the write-protected state automatically upon completion of a write
operation. The WREN instruction is required before any above operation is executed.
Figure 8.41 Write Enable Sequence
CE#
Mode 3
0
1
2
3
4
5
6
7
SCK
Mode 0
Instruction = 06h
SI
High Impedance
SO
Figure 8.42 Write Enable QPI Sequence
CE#
Mode 3 0
1
SCK
Mode 0
IO[3:0]
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8.17 WRITE DISABLE OPERATION (WRDI, 04h)
The Write Disable (WRDI) instruction resets the WEL bit and disables all write instructions. The WRDI
instruction is not required after the execution of a write instruction, since the WEL bit is automatically reset.
Figure 8.43 Write Disable Sequence
CE#
Mode 3
0
1
2
3
4
5
6
7
SCK
Mode 0
Instruction = 04h
SI
High Impedance
SO
Figure 8.44 Write Disable QPI Sequence
CE#
Mode 3 0
1
SCK
Mode 0
IO[3:0]
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8.18 READ STATUS REGISTER OPERATION (RDSR, 05h)
The Read Status Register (RDSR) instruction provides access to the Status Register. During the execution of a
program, erase or Write Status Register operation, the RDSR instruction will be executed, which can be used to
check the progress or completion of an operation by reading the WIP bit.
Figure 8.45 Read Status Register Sequence
CE #
Mode 3 0
1
2
3
4
5
7
6
8
9
10
11
12
13
14
15
SCK
Mode 0
SI
Instruction = 05h
tV
SO
Data Out
7
6
5
4
3
2
1
0
Figure 8.46 Read Status Register QPI Sequence
CE#
Mode 3 0
2
1
3
SCK
Mode 0
tV
IO[3:0]
05h
7:4
3:0
Data Out
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8.19 WRITE STATUS REGISTER OPERATION (WRSR, 01h)
The Write Status Register (WRSR) instruction allows the user to enable or disable the block protection and
Status Register write protection features by writing “0”s or “1”s into the non-volatile BP3, BP2, BP1, BP0, and
SRWD bits. Also WRSR instruction allows the user to disable or enable quad operation by writing “0” or “1” into
the non-volatile QE bit.
Figure 8.47 Write Status Register Sequence
CE #
Mode 3 0
1
2
3
4
5
7
6
8
9
10
11
12
13
14
15
2
1
0
SCK
Mode 0
Data In
SI
SO
Instruction = 01h
7
6
2
3
7:4
3:0
5
4
3
High Impedence
Figure 8.48 Write Status Register QPI Sequence
CE#
Mode 3 0
1
SCK
Mode 0
IO[3:0]
01h
Data In
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8.20 READ FUNCTION REGISTER OPERATION (RDFR, 48h)
The Read Function Register (RDFR) instruction provides access to the Function Register. Refer to Table 6.6
Function Register Bit Definition for more detail.
Figure 8.49 Read Function Register Sequence
CE #
Mode 3 0
1
2
3
4
5
7
6
8
9
10
11
12
13
14
15
SCK
Mode 0
SI
Instruction = 48h
tV
SO
Data Out
7
6
5
4
3
2
1
0
Figure 8.50 Read Function Register QPI Sequence
CE#
Mode 3 0
1
2
3
SCK
Mode 0
tV
IO[3:0]
48h
7:4
3:0
Data Out
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8.21 WRITE FUNCTION REGISTER OPERATION (WRFR, 42h)
The Write Function Register (WRFR) instruction allows the user to enable or disable additional RESET# pin
(pin3) by writing into RESET# Enable/Disable bit and lock or unlock the Information Row by writing “0”s (IR
Lock) or “1”s (IR Unlock) into IRL3, IRL2, IRL1, IRL0.
Figure 8.51 Write Function Register Sequence
CE #
Mode 3 0
1
2
3
4
5
7
6
8
9
10
11
12
13
14
15
2
1
0
SCK
Mode 0
Data In
SI
SO
Instruction = 42h
7
6
2
3
7:4
3:0
5
4
3
High Impedence
Figure 8.52 Write Function Register QPI Sequence
CE#
Mode 3 0
1
SCK
Mode 0
IO[3:0]
42h
Data In
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8.22 ENTER QUAD PERIPHERAL INTERFACE (QPI) MODE OPERATION (QIOEN,35h; QIODI,F5h)
The Enter Quad I/O (QIOEN) instruction, 35h, enables the Flash device for QPI bus operation. Upon completion
of the instruction, all instructions thereafter will be 4-bit multiplexed input/output until a power cycle or an Exit
Quad I/O instruction is sent to device.
The Exit Quad I/O instruction, F5h, resets the device to 1-bit SPI protocol operation. To execute an Exit Quad
I/O operation, the host drives CE# low, sends the Exit Quad I/O command cycle, then drives CE# high. The
device just accepts QPI (2 clocks) command cycles.
Figure 8.53 Enter Quad Peripheral Interface (QPI) Mode Sequence
CE#
Mode 3
0
1
2
3
4
5
6
7
SCK
Mode 0
Instruction = 35h
SI
High Impedance
SO
Figure 8.54 Exit Quad Peripheral Interface (QPI) Mode Sequence
CE#
Mode 3 0
1
SCK
Mode 0
IO[3:0]
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8.23 PROGRAM/ERASE SUSPEND & RESUME
The device allows the interruption of Sector Erase, Block Erase, or Page Program operations to conduct other
operations. 75h/B0h/85h command for suspend and 7Ah/30h/8Ah for resume will be used. (SPI/QPI all
acceptable) Function Register bit2 (PSUS) and bit3 (ESUS) are used to check whether or not the device is in
suspend mode.
Suspend to read ready timing: 100µs
Resume to another suspend timing: 400µs
PROGRAM/ERASE SUSPEND DURING SECTOR-ERASE OR BLOCK-ERASE (PERSUS 75h/B0h/85h)
The Program/Erase Suspend allows the interruption of Sector Erase and Block Erase operations. After the
Program/Erase Suspend, program, read related, resume and reset commands can be accepted. It is possible to
nest a Program/Erase Suspend operation during a Program inside a Program/Erase Suspend operation. Refer
to Table 8.7 for more detail.
To execute the Program/Erase Suspend operation, the host drives CE# low, sends the Program/Erase Suspend
command cycle (75h/B0h/85h), then drives CE# high. The Function Register indicates that the Erase has been
suspended by changing the ESUS bit from “0” to “1”, but the device will not accept another command until it is
ready. To determine when the device will accept a new command, poll the WIP bit or wait the specified time tSUS.
When ESUS bit is issued, the Write Enable Latch (WEL) bit will be reset.
PROGRAM/ERASE SUSPEND DURING PAGE PROGRAMMING (PERSUS 75h/B0h/85h)
The Program/Erase Suspend allows the interruption of an array Program operation. After the Program/Erase
Suspend command, WEL bit will be disabled, therefore only read related, resume and reset commands can be
accepted. Refer to Table 8.7 for more detail.
To execute the Program/Erase Suspend operation, the host drives CE# low, sends the Program/Erase Suspend
command cycle (75h/B0h/85h), then drives CE# high. The Function Register indicates that the programming
has been suspended by changing the PSUS bit from “0” to “1”, but the device will not accept another command
until it is ready. To determine when the device will accept a new command, poll the WIP bit or wait the specified
time tSUS.
PROGRAM/ERASE RESUME (PERRSM 7Ah/30h/8Ah)
The Program/Erase Resume restarts the Program or Erase command that was suspended, and changes the
suspend status bit in the Function Register (ESUS or PSUS bits) back to “0”. To execute the Program/Erase
Resume operation, the host drives CE# low, sends the Program/Erase Resume command cycle (7Ah/30h/8Ah),
then drives CE# high. A cycle is two nibbles long, most significant nibble first. To determine if the internal, selftimed Write operation completed, poll the WIP bit, or wait the specified time tSE, tBE or tPP for Sector Erase, Block
Erase, or Page Programming, respectively. The total write time before suspend and after resume will not exceed
the uninterrupted write times tSE, tBE or tPP.
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Table 8.7 Instructions accepted during Suspend
Operation
Suspended
Instruction Allowed
Name
Hex Code
Operation
Program or Erase
NORD
03h
Normal Read Mode
Program or Erase
4NORD
13h
4-byte Address Normal Read Mode
Program or Erase
FRD
0Bh
Fast Read Mode
Program or Erase
4FRD
0Ch
4-byte Address Fast Read Mode
Program or Erase
FRDIO
BBh
Fast Read Dual I/O
Program or Erase
4FRDIO
BCh
4-byte Address Fast Read Dual I/O
Program or Erase
FRDO
3Bh
Fast Read Dual Output
Program or Erase
4FRDO
3Ch
4-byte Address Fast Read Dual Output
Program or Erase
FRQIO
EBh
Fast Read Quad I/O
Program or Erase
4FRQIO
ECh
4-byte Address Fast Read Quad I/O
Program or Erase
FRQO
6Bh
Fast Read Quad Output
Program or Erase
4FRQO
6Ch
4-byte Address Fast Read Quad Output
Program or Erase
FRDTR
0Dh
Fast Read DTR Mode
Program or Erase
4FRDTR
0Eh
4-byte Address Fast Read DTR Mode
Program or Erase
FRDDTR
BDh
Fast Read Dual I/O DTR
Program or Erase
4FRDDTR
BEh
4-byte Address Fast Read Dual I/O DTR
Program or Erase
FRQDTR
EDh
Fast Read Quad I/O DTR
Program or Erase
4FRQDTR
EEh
4-byte Address Fast Read Quad I/O DTR
Erase
PP
02h
Serial Input Page Program
Erase
4PP
12h
4-byte Address Serial Input Page Program
Erase
PPQ
32h/38h
Quad Input Page Program
Erase
4PPQ
34h/3Eh
4-byte Address Quad Input Page Program
Erase
WREN
06h
Write Enable
Program or Erase
RDSR
05h
Read Status Register
Program or Erase
RDFR
48h
Read Function Register
Erase
CLERP
82h
Clear Extended Read Register
Program or Erase
PERRSM
7Ah/30h/8Ah
Program/Erase Resume
Erase
PERSUS
75h/B0h/85h
Program/Erase Suspend
Program or Erase
RDID
ABh
Program or Erase
SRPV
C0/63h
Program or Erase
SERPV
83h
Set Extended Read Parameters (Volatile)
Program or Erase
RDRP
61h
Read Read Parameters (Volatile)
Program or Erase
RDERP
81h
Read Extended Read Parameters (Volatile)
Program or Erase
RDJDID
9Fh
Read Manufacturer and Product ID by JEDEC ID Command
Program or Erase
RDMDID
90h
Read Manufacturer and Device ID
Program or Erase
RDJDIDQ
AFh
Read JEDEC ID QPI mode
Program or Erase
RDUID
4Bh
Read Unique ID Number
Program or Erase
RDSFDP
5Ah
SFDP Read
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Read Manufacturer and Product ID
Set Read Parameters (Volatile)
89
IS25LP256, IS25WP256
Instruction Allowed
Operation
Suspended
Name
Hex Code
Program or Erase
NOP
00h
No Operation
Program or Erase
RSTEN
66h
Software reset enable
Program or Erase
RST
99h
Reset (Only along with RSTEN 66h)
Program or Erase
IRRD
78h
Read Information Row
Erase
SECUNLOCK
26h
Sector Unlock
Erase
4SECUNLOCK
25h
4-byte Address Sector Unlock
Erase
SECLOCK
24h
Sector Lock
Program or Erase
RDABR
E1h
Read AutoBoot Register
Program or Erase
RDBR
16h/C8h
Read Bank Address Register
Program or Erase
WRBRV
17h/C5h
Write Volatile Bank Address Register
Program or Erase
EN4B
Program or Erase
Erase
Operation
B7h
Enter 4-byte Address Mode
EX4B
29h
Exit 4-byte Address Mode
RDDYB
FAh
Read DYB
Erase
4RDDYB
E0h
4-byte Address Read DYB
Erase
WRDYB
FBh
Write DYB
Erase
4WRDYB
E1h
4-byte Address Write DYB
Erase
RDPPB
FCh
Read PPB
Erase
4RDPPB
E2h
4-byte Address Read PPB
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IS25LP256, IS25WP256
8.24 ENTER DEEP POWER DOWN (DP, B9h)
The Deep Power-down (DP) instruction is for setting the device on the minimizing the power consumption (enter
into Power-down mode). During this mode, standby current is reduced from Isb1 to Isb2. While in the Power-down
mode, the device is not active and all Write/Program/Erase instructions are ignored. The instruction is initiated
by driving the CE# pin low and shifting the instruction code into the device. The CE# pin must be driven high
after the instruction has been latched, or Power-down mode will not engage. Once CE# pin driven high, the
Power-down mode will be entered within the time duration of tDP. While in the Power-down mode only the
Release from Power-down/RDID instruction, which restores the device to normal operation, will be recognized.
All other instructions are ignored, including the Read Status Register instruction which is always available during
normal operation. Ignoring all but one instruction makes the Power Down state a useful condition for securing
maximum write protection. It is available in both SPI and QPI mode.
Figure 8.55 Enter Deep Power Down Mode Sequence
tDP
CE #
Mode 3 0
1
2
3
4
5
6
7
SCK
Mode 0
SI
SO
Instruction = B9h
High Impedance
Figure 8.56 Enter Deep Power Down Mode QPI Sequence
tDP
CE#
Mode 3 0
1
SCK
Mode 0
IO[3:0]
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91
IS25LP256, IS25WP256
8.25 RELEASE DEEP POWER DOWN (RDPD, ABh)
The Release Deep Power-down/Read Device ID instruction is a multi-purpose command. To release the device
from the deep power-down mode, the instruction is issued by driving the CE# pin low, shifting the instruction
code into the device and driving CE# high.
Releasing the device from Power-down mode will take the time duration of tRES1 before normal operation is
restored and other instructions are accepted. The CE# pin must remain high during the tRES1 time duration. If
the Release Deep Power-down/RDID instruction is issued while an Erase, Program or Write cycle is in progress
(WIP=1) the instruction is ignored and will not have any effects on the current cycle.
Figure 8.57 Release Power Down Mode Sequence
tRES1
CE #
Mode 3 0
1
2
3
4
5
6
7
SCK
Mode 0
SI
SO
Instruction = ABh
High Impedance
Figure 8.58 Release Power Down Mode QPI Sequence
tRES1
CE#
Mode 3 0
1
SCK
Mode 0
IO[3:0]
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ABh
92
IS25LP256, IS25WP256
8.26 SET READ PARAMETERS OPERATION (SRPNV: 65h, SRPV: C0h/63h)
Set Read Parameter Bits
This device supports configurable burst length and dummy cycles in both SPI and QPI mode by setting three
bits (P2, P1, P0) and four bits (P6, P5, P4, P3) within the Read Register, respectively. To set those bits the
SRPNV and SRPV operation instruction are used. Details regarding burst length and dummy cycles can be
found in Table 6.9, Table 6.10, and Table 6.11. HOLD#/RESET# pin selection (P7) bit in the Read Register can
be set with the SRPNV and SRPV operation as well, in order to select RESET# pin instead of HOLD# pin. For
16-pin SOIC, RESET# pin will be a separate pin and it is independent of the P7 bit setting in Read Register.
SRPNV is used to set the non-volatile Read Register, while SRPV is used to set the volatile Read Register.
Note: When SRPNV is executed, the volatile Read Register is set as well as the non-volatile Read Register.
Figure 8.59 Set Read Parameters Sequence
CE #
Mode 3 0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
2
1
0
SCK
Mode 0
Data In
SI
SO
Instruction = 65h or C0h/63h
7
6
2
3
7:4
3:0
5
4
3
High Impedence
Figure 8.60 Set Read Parameters QPI Sequence
CE#
Mode 3 0
1
SCK
Mode 0
IO[3:0]
65h or
C0h/63h
Data In
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Read with “8/16/32/64-Byte Wrap Around”
The device is capable of burst read with wrap around in both SPI and QPI mode. The size of burst length is
configurable by using P0, P1, and P2 bits in Read Register. P2 bit (Wrap enable) enables the burst mode
feature. P0 and P1 define the size of burst. Burst lengths of 8, 16, 32, and 64 bytes are supported. By default,
address increases by one up through the entire array. By setting the burst length, the data being accessed can
be limited to the length of burst boundary within a 256 byte page. The first output will be the data at the initial
address which is specified in the instruction. Following data will come out from the next address within the burst
boundary. Once the address reaches the end of boundary, it will automatically move to the first address of the
boundary. CE# high will terminate the command.
For example, if burst length of 8 and initial address being applied is 0h, following byte output will be from
address 00h and continue to 01h,..,07h, 00h, 01h… until CE# terminates the operation. If burst length of 8 and
initial address being applied is FEh(254d), following byte output will be from address FEh and continue to FFh,
F8h, F9h, FAh, FBh, FCh, FDh, and repeat from FEh until CE# terminates the operation.
The commands, “SRPV (65h) or SRPNV (C0h or 63h)”, are used to configure the burst length. If the following
data input is one of “00h”,”01h”,”02h”, and ”03h”, the device will be in default operation mode. It will be
continuous burst read of the whole array. If the following data input is one of “04h”,”05h”,”06h”, and ”07h”, the
device will set the burst length as 8,16,32 and 64, respectively.
To exit the burst mode, another “C0h or 63h” command is necessary to set P2 to 0. Otherwise, the burst mode
will be retained until either power down or reset operation. To change burst length, another “C0h or 63h”
command should be executed to set P0 and P1 (Detailed information in Table 6.9 Burst Length Data). All read
commands will operate in burst mode once the Read Register is set to enable burst mode.
Refer to Figure 8.59 and Figure 8.60 for instruction sequence.
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IS25LP256, IS25WP256
8.27 SET EXTENDED READ PARAMETERS OPERATION (SERPNV: 85h, SERPV: 83h)
Set Read Operational Driver Strength
This device supports configurable Operational Driver Strength in both SPI and QPI modes by setting three bits
(ODS0, ODS1, ODS2) within the Extended Read Register. To set the ODS bits the SERPNV and SERPV
operation instructions are required. The device’s driver strength can be reduced as low as 12.50% of full drive
strength. Details regarding the driver strength can be found in Table 6.14.
SERPNV is used to set the non-volatile Extended Read register, while SERPV is used to set the volatile
Extended Read register.
Notes:
1. The default driver strength is set to 50%.
2. When SERPNV is executed, the volatile Read Extended Register is set as well as the non-volatile Read Extended
Register.
Figure 8.61 Set Extended Read Parameters Sequence
CE #
Mode 3 0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
2
1
0
SCK
Mode 0
Data In
SI
SO
Instruction = 85h/83h
7
6
5
4
3
High Impedence
Figure 8.62 Set Extended Read Parameters QPI Sequence
CE#
Mode 3 0
1
2
3
7:4
3:0
SCK
Mode 0
IO[3:0]
85h/83h
Data In
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8.28 READ READ PARAMETERS OPERATION (RDRP, 61h)
Prior to, or after setting Read Register, the data of the Read Register can be confirmed by the RDRP command.
The instruction is only applicable for the volatile Read Register, not for the non-volatile Read Register.
Figure 8.63 Read Read Parameters Sequence
CE #
Mode 3 0
1
2
3
4
5
7
6
8
9
10
11
12
13
14
15
SCK
Mode 0
SI
Instruction = 61h
tV
SO
Data Out
7
6
5
4
3
2
1
0
Figure 8.64 Read Read Parameters QPI Sequence
CE#
Mode 3 0
1
2
3
SCK
Mode 0
tV
IO[3:0]
61h
7:4
3:0
Data Out
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8.29 READ EXTENDED READ PARAMETERS OPERATION (RDERP, 81h)
Prior to, or after setting Extended Read Register, the data of the Extended Read Register can be confirmed by
the RDERP command. The instruction is only applicable for the volatile Extended Read Register, not for the
non-volatile Extended Read Register.
During the execution of a program, erase or Write Non-Volatile Register operation, the RDERP instruction will
be executed, which can be used to check the progress or completion of an operation by reading the WIP bit.
Figure 8.65 Read Extended Read Parameters Sequence
CE #
Mode 3 0
1
2
3
4
5
7
6
8
9
10
11
12
13
14
15
SCK
Mode 0
SI
Instruction = 81h
tV
Data Out
SO
7
6
5
4
3
2
1
0
Figure 8.66 Read Extended Read Parameters QPI Sequence
CE#
Mode 3 0
1
2
3
SCK
Mode 0
tV
IO[3:0]
81h
7:4
3:0
Data Out
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IS25LP256, IS25WP256
8.30 CLEAR EXTENDED READ REGISTER OPERATION (CLERP, 82h)
A Clear Extended Read Register (CLERP) instruction clears PROT_E, P_ERR, and E_ERR error bits in the
Extended Read Register to “0” when the error bits are set to “1”. Once the error bits are set to “1”, they remains
set to “1” until they are cleared to “0” with a CLERP command.
Figure 8.67 Clear Extended Read Register Sequence
CE#
Mode 3
0
1
2
3
4
5
6
7
SCK
Mode 0
Instruction = 82h
SI
High Impedance
SO
Figure 8.68 Clear Extended Read Register QPI Sequence
CE#
Mode 3 0
1
SCK
Mode 0
IO[3:0]
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98
IS25LP256, IS25WP256
8.31 READ PRODUCT IDENTIFICATION (RDID, ABh)
The Release from Power-down/Read Device ID instruction is a multi-purpose instruction. It can support both SPI
and QPI modes. The Read Product Identification (RDID) instruction is for reading out the old style of 8-bit
Electronic Signature, whose values are shown as the table of Product Identification.
The RDID instruction code is followed by three dummy bytes, each bit being latched-in on SI during the rising
SCK edge. Then the Device ID is shifted out on SO with the MSB first, each bit been shifted out during the
falling edge of SCK. The RDID instruction is ended by driving CE# high. The Device ID (ID7-ID0) outputs
repeatedly if additional clock cycles are continuously sent to SCK while CE# is at low.
Table 8.8 Product Identification
Manufacturer ID
(MF7-MF0)
ISSI Serial Flash
9Dh
Instruction
ABh
90h
Part Number
Device ID (ID7-ID0)
9Fh
Memory Type + Capacity
(ID15-ID0)
IS25LP256
18h
6019h
IS25WP256
18h
7019h
Figure 8.69 Read Product Identification Sequence
CE #
Mode 3 0
1
...
7
8
9
...
31
32
33
...
39
SCK
Mode 0
SI
Instruction = ABh
3 Dummy Bytes
tV
SO
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Data Out
Device ID
(ID7-ID0)
99
IS25LP256, IS25WP256
Figure 8.70 Read Product Identification QPI Sequence
CE#
Mode 3 0
1
2
3
4
5
6
7
8
9
SCK
Mode 0
tV
IO[3:0]
ABh
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6 Dummy Cycles
Device ID
(ID7-ID0)
100
IS25LP256, IS25WP256
8.32 READ PRODUCT IDENTIFICATION BY JEDEC ID OPERATION (RDJDID, 9Fh; RDJDIDQ, AFh)
The JEDEC ID READ instruction allows the user to read the manufacturer and product ID of devices. Refer to
Table 8.8 Product Identification for Manufacturer ID and Device ID. After the JEDEC ID READ command (9Fh in
SPI mode, AFh in QPI mode) is input, the Manufacturer ID is shifted out MSB first followed by the 2-byte
electronic ID (ID15-ID0) that indicates Memory Type and Capacity, one bit at a time. Each bit is shifted out
during the falling edge of SCK. If CE# stays low after the last bit of the 2-byte electronic ID, the Manufacturer ID
and 2-byte electronic ID will loop until CE# is pulled high.
Figure 8.71 Read Product Identification by JEDEC ID Read Sequence in SPI mode
CE #
Mode 3 0
1
...
7
8
9
...
15
16
17
...
23
24
25
...
31
SCK
Mode 0
SI
Instruction = 9Fh
tV
Manufacturer ID
(MF7-MF0)
SO
Capacity
(ID7-ID0)
Memory Type
(ID15-ID8)
Figure 8.72 RDJDIDQ (Read JEDEC ID in QPI Mode) Sequence
CE#
Mode 3 0
1
2
3
4
5
6
7
SCK
Mode 0
IO[3:0]
tV
AFh
7:4
3:0
MF7-MF0
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7:4
3:0
ID15-ID8
7:4
3:0
ID7-ID0
101
IS25LP256, IS25WP256
8.33 READ DEVICE MANUFACTURER AND DEVICE ID OPERATION (RDMDID, 90h)
The Read Device Manufacturer and Device ID (RDMDID) instruction allows the user to read the Manufacturer
and product ID of devices. Refer to Table 8.8 Product Identification for Manufacturer ID and Device ID. The
RDMDID instruction code is followed by two dummy bytes and one byte address (A7~A0), each bit being
latched-in on SI during the rising edge of SCK. If one byte address is initially set as A0 = 0, then the
Manufacturer ID is shifted out on SO with the MSB first followed by the device ID (ID7- ID0). Each bit is shifted
out during the falling edge of SCK. If one byte address is initially set as A0 = 1, then Device ID7-ID0 will be read
first followed by the Manufacturer ID. The Manufacturer and Device ID can be read continuously alternating
between the two until CE# is driven high.
Figure 8.73 Read Product Identification by RDMDID Sequence
CE #
Mode 3 0
1
...
7
8
9
...
31
32
33
...
39
40
41
...
47
SCK
Mode 0
SI
Instruction = 90h
3-byte Address
tV
Device ID
(ID7-ID0)
Manufacturer ID
(MF7-MF0)
SO
Notes:
1. ADDRESS A0 = 0, will output the 1-byte Manufacturer ID (MF7-MF0)  1-byte Device ID (ID7-ID0)
ADDRESS A0 = 1, will output the 1-byte Device ID (ID7-ID0)  1-byte Manufacturer ID (MF7-MF0)
2. The Manufacturer and Device ID can be read continuously and will alternate from one to the other until CE# pin
is pulled high.
Figure 8.74 Read Product Identification by RDMDID QPI Sequence
CE#
Mode 3 0
1
2
3
4
5
6
7
8
9
10
11
SCK
Mode 0
tV
IO[3:0]
90h
23:20 19:16 15:12 11:8
Instruction
3-byte Address
7:4
3:0
7:4
3:0
7:4
3:0
Manufacturer Device ID
ID (MF7-MF0) (ID7-ID0)
Notes:
1. ADDRESS A0 = 0, will output the 1-byte Manufacturer ID (MF7-MF0)  1-byte Device ID (ID7-ID0)
ADDRESS A0 = 1, will output the 1-byte Device ID (ID7-ID0)  1-byte Manufacturer ID (MF7-MF0)
2. The Manufacturer and Device ID can be read continuously and will alternate from one to the other until CE# pin
is pulled high.
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8.34 READ UNIQUE ID NUMBER (RDUID, 4Bh)
The Read Unique ID Number (RDUID) instruction accesses a factory-set read-only 16-byte number that is
unique to the device. The ID number can be used in conjunction with user software methods to help prevent
copying or cloning of a system. The RDUID instruction is instated by driving the CE# pin low and shifting the
instruction code (4Bh) followed by 3 address bytes and dummy cycles (configurable, default is 8 clocks). After
which, the 16-byte ID is shifted out on the falling edge of SCK as shown below.
As a result, the sequence of RDUID instruction is same as FAST READ. RDUID QPI sequence is also same as
FAST READ QPI except for the instruction code. Refer to the FAST READ QPI operation.
Note: 16 bytes of data will repeat as long as CE# is low and SCK is toggling.
Figure 8.75 RDUID Sequence
CE #
Mode 3 0
1
...
7
8
9
...
31
32
33
...
39
40
41
...
47
...
SCK
Mode 0
SI
Instruction = 4Bh
3 Byte Address
Dummy Cycles
tV
SO
Data Out
Note: Dummy cycles depends on Read Parameter setting. Detailed information in Table 6.11 Read Dummy Cycles.
A[23:16]
A[15:9]
A[8:4]
A[3:0]
XXh
XXh
00h
0h Byte address
XXh
XXh
00h
1h Byte address
XXh
XXh
00h
2h Byte address
XXh
XXh
00h
…
Table 8.9 Unique ID Addressing
XXh
XXh
00h
Fh Byte address
Note: XX means “don’t care”.
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8.35 READ SFDP OPERATION (RDSFDP, 5Ah)
The Serial Flash Discoverable Parameters (SFDP) standard provides a consistent method of describing the
functions and features of serial Flash devices in a standard set of internal parameter tables. These parameters
can be interrogated by host system software to enable adjustments needed to accommodate divergent features
from multiple vendors. For more details please refer to the JEDEC Standard JESD216A (Serial Flash
Discoverable Parameters).
The sequence of issuing RDSFDP instruction is same as FAST_READ: CE# goes low  Send RDSFDP
instruction (5Ah)  Send 3 address bytes on SI pin  Send dummy cycles (configurable, default is 8 clocks) on
SI pin  Read SFDP code on SO  End RDSFDP operation by driving CE# high at any time during data out.
Refer to ISSI’s Application note for SFDP table. The data at the addresses that are not specified in SFDP table
are undefined.
The sequence of RDSFDP instruction is same as FAST READ except for the instruction code. RDSFDP QPI
sequence is also same as FAST READ QPI except for the instruction code. Refer to the FAST READ QPI
operation.
Figure 8.76 RDSFDP (Read SFDP) Sequence
CE #
Mode 3 0
1
...
7
8
9
...
31
32
33
...
39
40
41
...
47
...
SCK
Mode 0
SI
Instruction = 5Ah
3 Byte Address
Dummy Cycles
tV
SO
Data Out
Note: Dummy cycles depends on Read Parameter setting. Detailed information in Table 6.11 Read Dummy Cycles.
8.36 NO OPERATION (NOP, 00h)
The No Operation command solely cancels a Reset Enable command and has no impact on any other
commands. It is available in both SPI and QPI modes. To execute a NOP, the host drives CE# low, sends the
NOP command cycle (00H), then drives CE# high.
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8.37 SOFTWARE RESET (RESET-ENABLE (RSTEN, 66h) AND RESET (RST, 99h)) AND HARDWARE RESET
The Software Reset operation is used as a system reset that puts the device in normal operating mode. During
the Reset operation, the value of volatile registers will default back to the value in the corresponding non-volatile
register. However, the volatile FREEZE bit and the volatile PPB Lock bit in the PPB Lock Register are not
changed by Software Reset. In all other respects, Software Reset is the same as Hardware Reset. This
operation consists of two commands: Reset-Enable (RSTEN) and Reset (RST). The operation requires the
Reset-Enable command followed by the Reset command. Any command other than the Reset command after
the Reset-Enable command will disable the Reset-Enable.
Execute the CE# pin low  sends the Reset-Enable command (66h), and drives CE# high. Next, the host drives
CE# low again, sends the Reset command (99h), and pulls CE# high.
Only if the RESET# pin is enabled, Hardware Reset function is available. For all other packages except the
package with additional RESET# pin option, the RESET# pin will be solely applicable in SPI mode and when the
QE bit is disabled. For the package with additional RESET# pin which is enabled by the RESET#
Enable/Disable bit setting (“0” indicates Enable) in Function Register, the RESET# pin is always applicable
regardless of the QE bit value in Status Register and HOLD#/RESET# selection bit (P7) in Read Register. The
additional RESET# pin has an internal pull-up resistor and may be left floating if not used. The RESET# pin has
the highest priority among all the input signals and will reset the device to its initial power-on state regardless of
the state of all other pins (CE#, IOs, SCK, and WP#).
In order to activate Hardware Reset, the RESET# pin must be driven low for a minimum period of tRESET (1µs).
Drive RESET# low for a minimum period of tRESET will interrupt any on-going internal and external operations,
1
release the device from deep power down mode , disable all input signals, force the output pin enter a state of
high impedance, and reset all the read parameters. If the RESET# pulse is driven for a period shorter than 1µs,
it may still reset the device, however the 1µs minimum period is recommended to ensure the reliable operation.
The required wait time after activating a HW Reset before the device will accept another instruction (tHWRST) is
the same as the maximum value of tSUS (100µs).
The Software/Hardware Reset during an active Program or Erase operation aborts the operation, which can
result in corrupting or losing the data of the targeted address range. Depending on the prior operation, the reset
timing may vary. Recovery from a Write operation will require more latency than recovery from other operations.
Note1: The Status and Function Registers remain unaffected.
Figure 8.77 Software Reset Enable and Software Reset Sequence (RSTEN, 66h + RST, 99h)
CE#
Mode 3 0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
SCK
Mode 0
SI
Instruction = 66h
Instruction = 99h
High Impedance
SO
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Figure 8.78 Software Reset Enable and Software Reset QPI Sequence (RSTEN, 66h + RST, 99h)
CE#
Mode 3 0
1
0
1
SCK
Mode 0
IO[3:0]
99h
66h
8.38 SECURITY INFORMATION ROW
The security Information Row is comprised of an additional 4 x 256 bytes of programmable information. The
security bits can be reprogrammed by the user. Any program security instruction issued while an erase, program
or write cycle is in progress is rejected without having any effect on the cycle that is in progress.
Table 8.10 Information Row Valid Address Range
Address Assignment
IRL0 (Information Row Lock0)
IRL1
IRL2
IRL3
A[23:16]
00h
00h
00h
00h
A[15:8]
00h
10h
20h
30h
A[7:0]
Byte address
Byte address
Byte address
Byte address
Bit 7~4 of the Function Register is used to permanently lock the programmable memory array.
When Function Register bit IRLx = “0”, the 256 bytes of the programmable memory array can be programmed.
When Function Register bit IRLx = “1”, the 256 bytes of the programmable memory array function as read only.
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8.39 INFORMATION ROW ERASE OPERATION (IRER, 64h)
Information Row Erase (IRER) instruction erases the data in the Information Row x (x: 0~3) array. Prior to the
operation, the Write Enable Latch (WEL) must be set via a Write Enable (WREN) instruction. The WEL bit is
automatically reset after the completion of the operation.
The sequence of IRER operation: Pull CE# low to select the device  Send IRER instruction code  Send
three address bytes  Pull CE# high. CE# should remain low during the entire instruction sequence. Once CE#
is pulled high, Erase operation will begin immediately. The internal control logic automatically handles the erase
voltage and timing.
Figure 8.79 IRER (Information Row Erase) Sequence
CE #
Mode 3 0
1
2
3
4
5
6
7
8
9
10
...
28
29
30
31
1
0
SCK
Mode 0
3-byte Address
SI
SO
Instruction = 64h
23
22
21
...
3
2
High Impedance
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8.40 INFORMATION ROW PROGRAM OPERATION (IRP, 62h)
The Information Row Program (IRP) instruction allows up to 256 bytes data to be programmed into the memory
in a single operation. Before the execution of IRP instruction, the Write Enable Latch (WEL) must be enabled
through a Write Enable (WREN) instruction.
The IRP instruction code, three address bytes and program data (1 to 256 bytes) should be sequentially input.
Three address bytes has to be input as specified in the Table 8.10 Information Row Valid Address Range.
Program operation will start once the CE# goes high, otherwise the IRP instruction will not be executed. The
internal control logic automatically handles the programming voltages and timing. During a program operation,
all instructions will be ignored except the RDSR instruction. The progress or completion of the program
operation can be determined by reading the WIP bit. If the WIP bit is “1”, the program operation is still in
progress. If WIP bit is “0”, the program operation has completed.
If more than 256 bytes data are sent to a device, the address counter rolls over within the same page. The
previously latched data are discarded and the last 256 bytes data are kept to be programmed into the page. The
starting byte can be anywhere within the page. When the end of the page is reached, the address will wrap
around to the beginning of the same page. If the data to be programmed are less than a full page, the data of all
other bytes on the same page will remain unchanged.
Note: A program operation can alter “1”s into “0”s, but an erase operation is required to change “0”s back to “1”s.
A byte cannot be reprogrammed without first erasing the corresponding Information Row array which is one
of IR0~3.
Figure 8.80 IRP (Information Row Program) Sequence
1
...
7
8
9
...
31
32
33
...
39
...
...
2079
Mode 3 0
2072
CE #
SCK
Mode 0
SI
SO
Data In 1
3-byte Address
Instruction = 62h
23
22
...
0
7
6
...
Data In 256
0
...
7
...
0
High Impedance
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8.41 INFORMATION ROW READ OPERATION (IRRD, 68h)
The IRRD instruction is used to read memory data at up to a 166MHz clock.
The IRRD instruction code is followed by three address bytes (A23 - A0) and dummy cycles (configurable,
default is 8 clocks), transmitted via the SI line, with each bit latched-in during the rising edge of SCK. Then the
first data byte addressed is shifted out on the SO line, with each bit shifted out at a maximum frequency fCT,
during the falling edge of SCK.
The address is automatically incremented by one after each byte of data is shifted out. Once the address
reaches the last address of each 256 byte Information Row, the next address will not be valid and the data of
the address will be garbage data. It is recommended to repeat four times IRRD operation that reads 256 byte
with a valid starting address of each Information Row in order to read all data in the 4 x 256 byte Information
Row array. The IRRD instruction is terminated by driving CE# high (VIH).
If an IRRD instruction is issued while an Erase, Program or Write cycle is in process (WIP=1) the instruction is
ignored and will not have any effects on the current cycle
The sequence of IRRD instruction is same as Fast Read except for the instruction code. IRRD QPI sequence is
same as Fast Read QPI except for the instruction code. Refer to the Fast Read QPI operation.
Figure 8.81 IRRD (Information Row Read) Sequence
CE #
Mode 3 0
1
...
7
8
9
...
31
32
33
...
39
40
41
...
47
...
SCK
Mode 0
SI
Instruction = 68h
3 Byte Address
Dummy Cycles
tV
SO
Data Out
Note: Dummy cycles depends on Read Parameter setting. Detailed information in Table 6.11 Read Dummy Cycles.
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8.42 FAST READ DTR MODE OPERATION (FRDTR, 0Dh or 4FRDTR, 0Eh)
The FRDTR/4FRDTR instruction is for doubling the data in and out. Signals are triggered on both rising and
falling edge of clock. The address is latched on both rising and falling edge of SCK, and data of each bit shifts
out on both rising and falling edge of SCK at a maximum frequency fC2. The 2-bit address can be latched-in at
one clock, and 2-bit data can be read out at one clock, which means one bit at the rising edge of clock, the other
bit at the falling edge of clock.
The first address byte can be at any location. The address is automatically increased to the next higher address
after each byte of data is shifted out, so the whole memory can be read out in a single FRDTR/4FRDTR
instruction. The address counter rolls over to 0 when the highest address is reached.
• 0Dh (EXTADD=0) is followed by a 3-byte address (A23-A0) or
• 0Dh (EXTADD=1) is followed by a 4-byte address (A31-A0) or
• 0Eh is followed by a 4-byte address (A31-A0)
The sequence of issuing FRDTR/4FRDTR instruction is: CE# goes low  Sending FRDTR/4FRDTR instruction
code (1bit per clock)  3-byte or 4-byte address on SI (2-bit per clock) as above  8 dummy clocks
(configurable, default is 8 clocks) on SI  Data out on SO (2-bit per clock)  End FRDTR/4FRDTR operation
via driving CE# high at any time during data out.
While a Program/Erase/Write Status Register cycle is in progress, FRDTR/4FRDTR instruction will be rejected
without any effect on the current cycle.
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Figure 8.82 FRDTR Sequence (0Dh [EXTADD=0], 3-byte address)
CE #
Mode 3 0
1
2
3
4
5
6
7
8
9
10
...
19
20
21
SCK
Mode 0
3-byte Address
SI
Instruction = 0Dh
23 22 21 20 19 18 17
...
0
High Impedance
SO
CE #
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
...
SCK
SI
8 Dummy Cycles
tV
Data Out 1
SO
Data Out 2
Data Out ...
7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0 7 6 5 ...
Note: Dummy cycles depends on Read Parameter setting. Detailed information in Table 6.11 Read Dummy Cycles.
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Figure 8.83 FRDTR Sequence (0Dh [EXTADD=1] or 0Eh, 4-byte address)
CE #
Mode 3 0
1
2
3
4
5
6
7
8
9
10
...
27
28
29
SCK
Mode 0
4-byte Address
SI
Instruction = 0Dh/0Eh
31 30 29 28 27 26 25
...
0
High Impedance
SO
CE #
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
...
SCK
SI
8 Dummy Cycles
tV
Data Out 1
SO
Data Out 2
Data Out ...
7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0 7 6 5 ...
Note: Dummy cycles depends on Read Parameter setting. Detailed information in Table 6.11 Read Dummy Cycles.
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FAST READ DTR QPI MODE OPERATION (FRDTR QPI, 0Dh or 4FRDTR QPI, 0Eh)
The FRDTR/4FRDTR QPI instruction utilizes all four IO lines to input the instruction code so that only two clocks
are required, while the FRDTR/4FRDTR instruction requires that the byte-long instruction code is shifted into the
device only via IO0 (SI) line in eight clocks. In addition, subsequent address and data out are shifted in/out via
all four IO lines unlike the FRDTR/4FRDTR instruction. Eventually this operation is same as the
FRQDTR/4FRQDTR QPI, but the only different thing is that AX mode is not available in the FRDTR/4FRDTR
QPI operation. A Quad Enable (QE) bit of Status Register must be set to "1" before sending the
FRDTR/4FRDTR QPI instruction.
• 0Dh (EXTADD=0) is followed by a 3-byte address (A23-A0) or
• 0Dh (EXTADD=1) is followed by a 4-byte address (A31-A0) or
• 0Eh is followed by a 4-byte address (A31-A0)
The sequence of issuing FRDTR/4FRDTR QPI instruction is: CE# goes low  Sending FRDTR/4FRDTR QPI
instruction (4-bit per clock)  24-bit or 32-bit address interleave on IO3, IO2, IO1 & IO0 (8-bit per clock) as
above  6 dummy clocks (configurable, default is 6 clocks)  Data out interleave on IO3, IO2, IO1 & IO0 (8-bit
per clock)  End FRDTR/4FRDTR QPI operation by driving CE# high at any time during data out.
If the FRDTR/4FRDTR QPI instruction is issued while an Erase, Program or Write cycle is in process is in
progress (WIP=1), the instruction will be rejected without any effect on the current cycle.
Figure 8.84 FRDTR QPI Sequence (0Dh [EXTADD=0], 3-byte address)
CE #
Mode 3 0
1
2
3
4
5
6
7
8
9
10
11
12
...
SCK
Mode 0
IO0
IO1
IO2
IO3
Instruction
= 0Dh
6 Dummy Cycles
3-byte Address
tV
Data Data
Out Out
4
0
20 16 12 8 4 0
4 0 4 0 ...
5
1
21 17 13 9 5 1
5 1 5 1 ...
6
2
22 18 14 10 6 2
6 2 6 2 ...
7
3
23 19 15 11 7 3
7 3 7 3 ...
Notes:
1. Number of dummy cycles depends on clock speed. Detailed information in Table 6.11 Read Dummy Cycles.
2. Sufficient dummy cycles are required to avoid I/O contention.
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Figure 8.85 FRDTR QPI Sequence (0Dh [EXTADD=1] or 0Eh, 4-byte address)
CE #
Mode 3 0
1
2
3
4
5
6
7
8
9
10
11
12
...
SCK
Mode 0
IO0
IO1
IO2
IO3
Instruction
= 0Dh/0Eh
6 Dummy Cycles
4-byte Address
tV
Data
Out
4
0
28 24 20 16 12 8 4 0
4 0 ...
5
1
29 25 21 17 13 9 5 1
5 1 ...
6
2
30 26 22 18 14 10 6 2
6 2 ...
7
3
31 27 23 19 15 11 7 3
7 3 ...
Notes:
1. Number of dummy cycles depends on clock speed. Detailed information in Table 6.11 Read Dummy Cycles.
2. Sufficient dummy cycles are required to avoid I/O contention. If the number of dummy cycles and AX bits cycles
are same, then X should be Hi-Z.
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8.43 FAST READ DUAL IO DTR MODE OPERATION (FRDDTR, BDh or 4FRDDTR, BEh)
The FRDDTR/4FRDDTR instruction enables Double Transfer Rate throughput on dual I/O of the device in read
mode. The address (interleave on dual I/O pins) is latched on both rising and falling edge of SCK, and the data
(interleave on dual I/O pins) shift out on both rising and falling edge of SCK at a maximum frequency fT2. The 4bit address can be latched-in at one clock, and 4-bit data can be read out at one clock, which means two bits at
the rising edge of clock, the other two bits at the falling edge of clock.
The first address byte can be at any location. The address is automatically increased to the next higher address
after each byte of data is shifted out, so the whole memory can be read out with a single FRDDTR/4FRDDTR
instruction. The address counter rolls over to 0 when the highest address is reached. Once writing
FRDDTR/4FRDDTR instruction, the following address/dummy/data out will perform as 4-bit instead of previous
1-bit.
• BDh (EXTADD=0) is followed by a 3-byte address (A23-A0) or
• BDh (EXTADD=1) is followed by a 4-byte address (A31-A0) or
• BEh is followed by a 4-byte address (A31-A0)
The sequence of issuing FRDDTR/4FRDDTR instruction is: CE# goes low  Sending FRDDTR/4FRDDTR
instruction (1-bit per clock)  24-bit or 32-bit address interleave on IO1 & IO0 (4-bit per clock) as above  4
dummy clocks (configurable, default is 4 clocks) on IO1 & IO0  Data out interleave on IO1 & IO0 (4-bit per
clock)  End FRDDTR/4FRDDTR operation via pulling CE# high at any time during data out (Please refer to
Figures 8.86 and 8.87 for 2 x I/O Double Transfer Rate Read Mode Timing Waveform).
If AXh (where X is don’t care) is input for the mode bits during dummy cycles, the device will enter AX read
operation mode which enables subsequent FRDDTR/4FRDDTR execution skips command code. It saves cycles
as described in Figures 8.88 and 8.89. When the code is different from AXh (where X is don’t care), the device
exits the AX read operation. After finishing the read operation, device becomes ready to receive a new
command.
If the FRDDTR/4FRDDTR instruction is issued while an Erase, Program or Write cycle is in process is in
progress (WIP=1), the instruction will be rejected without any effect on the current cycle.
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Figure 8.86 FRDDTR Sequence (BDh [EXTADD=0], 3-byte address)
CE #
Mode 3 0
1
2
3
4
5
7
6
8
9
10
...
13
14
SCK
Mode 0
3-byte Address
SI
Instruction = BDh
22 20 18 16 14 12 10
4 Dummy Cycles
...
0 6 4
Mode Bits
High Impedance
SO
23 21 19 17 15 13 11
...
1 7 5
CE #
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
...
SCK
tV
SI
2 0
Data Out
Data Out
Data Out
Data Out
Data Out
Data Out
6 4 2 0 6 4 2 0 6 4 2 0 6 4 2 0 6 4 2 0 6 4 2 0 ...
Mode Bits
SO
3 1
7 5 3 1 7 5 3 1 7 5 3 1 7 5 3 1 7 5 3 1 7 5 3 1 ...
Notes:
1. If the mode bits=AXh (where X is don’t care), it can execute the AX read mode (without command). When the
mode bits are different from AXh, the device exits the AX read operation.
2. Number of dummy cycles depends on clock speed. Detailed information in Table 6.11 Read Dummy Cycles.
3. Sufficient dummy cycles are required to avoid I/O contention. If the number of dummy cycles and AX bits cycles
are same, then X should be Hi-Z.
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Figure 8.87 FRDDTR Sequence (BDh [EXTADD=1] or BEh, 4-byte address)
CE #
Mode 3 0
1
2
3
4
5
7
6
8
9
10
...
17
18
SCK
Mode 0
4-byte Address
SI
Instruction = BDh/BEh
30 28 26 24 22 20 18
4 Dummy Cycles
...
0 6 4
Mode Bits
High Impedance
SO
31 29 27 25 23 21 19
...
1 7 5
CE #
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
...
SCK
tV
SI
2 0
Data Out
Data Out
Data Out
Data Out
Data Out
Data Out
6 4 2 0 6 4 2 0 6 4 2 0 6 4 2 0 6 4 2 0 6 4 2 0 ...
Mode Bits
SO
3 1
7 5 3 1 7 5 3 1 7 5 3 1 7 5 3 1 7 5 3 1 7 5 3 1 ...
Notes:
1. If the mode bits=AXh (where X is don’t care), it can execute the AX read mode (without command). When the
mode bits are different from AXh, the device exits the AX read operation.
2. Number of dummy cycles depends on clock speed. Detailed information in Table 6.11 Read Dummy Cycles.
3. Sufficient dummy cycles are required to avoid I/O contention. If the number of dummy cycles and AX bits cycles
are same, then X should be Hi-Z.
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Figure 8.88 FRDDTR AX Read Sequence (BDh [EXTADD=0], 3-byte address)
CE #
Mode 3 0
1
2
...
6
7
8
9
10
11
12
13
14
15
16
...
SCK
Mode 0
4 Dummy Cycles
tV
3-byte Address
SI
22 20 18 16 14 12 10
...
Data Out
Data Out
Data Out
6 4 2 0 6 4 2 0 6 4 2 0 ...
0 6 4 2 0
Mode Bits
SO
23 21 19 17 15 13 11
...
7 5 3 1 7 5 3 1 7 5 3 1 ...
1 7 5 3 1
Notes:
1. If the mode bits=AXh (where X is don’t care), it will keep executing the AX read mode (without command). When
the mode bits are different from AXh, the device exits the AX read operation.
2. Number of dummy cycles depends on clock speed. Detailed information in Table 6.11 Read Dummy Cycles.
3. Sufficient dummy cycles are required to avoid I/O contention. If the number of dummy cycles and AX bits cycles
are same, then X should be Hi-Z.
Figure 8.89 FRDDTR AX Read Sequence (BDh [EXTADD=1] or BEh, 4-byte address)
CE #
Mode 3 0
1
2
...
8
9
10
11
12
13
14
15
16
17
18
...
SCK
Mode 0
4 Dummy Cycles
4-byte Address
SI
30 28 26 24 22 20 18
...
0 6 4 2 0
tV
Data Out
Data Out
Data Out
6 4 2 0 6 4 2 0 6 4 2 0 ...
Mode Bits
SO
31 29 27 25 23 21 19
...
1 7 5 3 1
7 5 3 1 7 5 3 1 7 5 3 1 ...
Notes:
1. If the mode bits=AXh (where X is don’t care), it will keep executing the AX read mode (without command). When
the mode bits are different from AXh, the device exits the AX read operation.
2. Number of dummy cycles depends on clock speed. Detailed information in Table 6.11 Read Dummy Cycles.
3. Sufficient dummy cycles are required to avoid I/O contention. If the number of dummy cycles and AX bits cycles
are same, then X should be Hi-Z.
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8.44 FAST READ QUAD IO DTR MODE OPERATION (FRQDTR, EDh or 4FRQDTR, EEh)
The FRQDTR/4FRQDTR instruction enables Double Transfer Rate throughput on quad I/O of the device in read
mode. A Quad Enable (QE) bit of Status Register must be set to "1" before sending the FRQDTR/4FRQDTR
instruction. The address (interleave on 4 I/O pins) is latched on both rising and falling edge of SCK, and data
(interleave on 4 I/O pins) shift out on both rising and falling edge of SCK at a maximum frequency fQ2. The 8-bit
address can be latched-in at one clock, and 8-bit data can be read out at one clock, which means four bits at the
rising edge of clock, the other four bits at the falling edge of clock.
The first address byte can be at any location. The address is automatically increased to the next higher address
after each byte data is shifted out, so the whole memory can be read out with a single FRQDTR/4FRQDTR
instruction. The address counter rolls over to 0 when the highest address is reached. Once writing
FRQDTR/4FRQDTR instruction, the following address/dummy/data out will perform as 8-bit instead of previous
1-bit.
• EDh (EXTADD=0) is followed by a 3-byte address (A23-A0) or
• EDh (EXTADD=1) is followed by a 4-byte address (A31-A0) or
• EEh is followed by a 4-byte address (A31-A0)
The sequence of issuing FRQDTR/4FRQDTR instruction is: CE# goes low  Sending FRQDTR/4FRQDTR
instruction (1-bit per clock)  24-bit or 32-bit address interleave on IO3, IO2, IO1 & IO0 (8-bit per clock) as
above  6 dummy clocks (configurable, default is 6 clocks)  Data out interleave on IO3, IO2, IO1 & IO0 (8-bit
per clock)  End FRQDTR/4FRQDTR operation by driving CE# high at any time during data out.
If AXh (where X is don’t care) is input for the mode bits during dummy cycles, the device will enter AX read
operation mode which enables subsequent FRQDTR/4FRQDTR execution skips command code. It saves
cycles as described in Figures 8.92 and 8.93. When the code is different from AXh (where X is don’t care), the
device exits the AX read operation. After finishing the read operation, device becomes ready to receive a new
command.
If the FRQDTR/4FRQDTR instruction is issued while an Erase, Program or Write cycle is in process is in
progress (WIP=1), the instruction will be rejected without any effect on the current cycle.
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Figure 8.90 FRQDTR Sequence (EDh [EXTADD=0], 3-byte address)
CE #
Mode 3 0
1
2
3
4
5
7
6
8
9
10
11
12
SCK
Mode 0
3-byte Address
IO0
Instruction = EDh
6 Dummy Cycles
20 16 12 8 4 0 4 0
High Impedance
IO1
21 17 13 9 5 1 5 1
IO2
22 18 14 10 6 2 6 2
IO3
23 19 15 11 7 3 7 3
Mode Bits
CE #
13
14
15
16
17
18
19
20
21
22
23
24
25
26
...
SCK
Data Data Data Data Data Data Data Data Data Data
tV Out Out Out Out Out Out Out Out Out Out
IO0
4 0 4 0 4 0 4 0 4 0 4 0 4 0 4 0 4 0 4 0 ...
IO1
5 1 5 1 5 1 5 1 5 1 5 1 5 1 5 1 5 1 5 1 ...
IO2
6 2 6 2 6 2 6 2 6 2 6 2 6 2 6 2 6 2 6 2 ...
IO3
7 3 7 3 7 3 7 3 7 3 7 3 7 3 7 3 7 3 7 3 ...
Notes:
1. If the mode bits=AXh (where X is don’t care), it can execute the AX read mode (without command). When the
mode bits are different from AXh, the device exits the AX read operation.
2. Number of dummy cycles depends on clock speed. Detailed information in Table 6.11 Read Dummy Cycles.
3. Sufficient dummy cycles are required to avoid I/O contention. If the number of dummy cycles and AX bits cycles
are same, then X should be Hi-Z.
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Figure 8.91 FRQDTR Sequence (EDh [EXTADD=1] or EEh, 4-byte address)
CE #
Mode 3 0
1
2
3
4
5
7
6
8
9
10
11
12
13
SCK
Mode 0
4-byte Address
IO0
Instruction = EDh/EEh
6 Dummy Cycles
28 24 20 16 12 8 4 0 4 0
High Impedance
IO1
29 25 21 17 13 9 5 1 5 1
IO2
30 26 22 18 14 10 6 2 6 2
IO3
31 27 23 19 15 11 7 3 7 3
Mode Bits
CE #
14
15
16
17
18
19
20
21
22
23
24
25
26
27
...
SCK
Data Data Data Data Data Data Data Data Data Data
tV Out Out Out Out Out Out Out Out Out Out
IO0
4 0 4 0 4 0 4 0 4 0 4 0 4 0 4 0 4 0 4 0 ...
IO1
5 1 5 1 5 1 5 1 5 1 5 1 5 1 5 1 5 1 5 1 ...
IO2
6 2 6 2 6 2 6 2 6 2 6 2 6 2 6 2 6 2 6 2 ...
IO3
7 3 7 3 7 3 7 3 7 3 7 3 7 3 7 3 7 3 7 3 ...
Notes:
1. If the mode bits=AXh (where X is don’t care), it can execute the AX read mode (without command). When the
mode bits are different from AXh, the device exits the AX read operation.
2. Number of dummy cycles depends on clock speed. Detailed information in Table 6.11 Read Dummy Cycles.
3. Sufficient dummy cycles are required to avoid I/O contention. If the number of dummy cycles and AX bits cycles
are same, then X should be Hi-Z.
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Figure 8.92 FRQDTR AX Read Sequence (EDh [EXTADD=0], 3-byte address)
CE #
Mode 3 0
1
2
3
4
5
6
7
8
9
10
11
12
...
SCK
Mode 0
6 Dummy Cycles
3-byte Address
IO0
IO1
IO2
IO3
Data Data Data Data
tV Out Out Out Out
20 16 12 8 4 0 4 0
4 0 4 0 4 0 4 0 ...
21 17 13 9 5 1 5 1
5 1 5 1 5 1 5 1 ...
22 18 14 10 6 2 6 2
6 2 6 2 6 2 6 2 ...
23 19 15 11 7 3 7 3
7 3 7 3 7 3 7 3 ...
Mode Bits
Notes:
1. If the mode bits=AXh (where X is don’t care), it will keep executing the AX read mode (without command). When
the mode bits are different from AXh, the device exits the AX read operation.
2. Number of dummy cycles depends on clock speed. Detailed information in Table 6.11 Read Dummy Cycles.
3. Sufficient dummy cycles are required to avoid I/O contention. If the number of dummy cycles and AX bits cycles
are same, then X should be Hi-Z.
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Figure 8.93 FRQDTR AX Read Sequence (EDh [EXTADD=1] or EEh, 4-byte address)
CE #
Mode 3 0
1
2
3
4
5
6
7
8
9
10
11
12
13
...
SCK
Mode 0
6 Dummy Cycles
4-byte Address
IO0
IO1
IO2
IO3
Data Data Data Data
tV Out Out Out Out
28 24 20 16 12 8 4 0 4 0
4 0 4 0 4 0 4 0 ...
29 25 21 17 13 9 5 1 5 1
5 1 5 1 5 1 5 1 ...
30 26 22 18 14 10 6 2 6 2
6 2 6 2 6 2 6 2 ...
31 27 23 19 15 11 7 3 7 3
7 3 7 3 7 3 7 3 ...
Mode Bits
Notes:
1. If the mode bits=AXh (where X is don’t care), it will keep executing the AX read mode (without command). When
the mode bits are different from AXh, the device exits the AX read operation.
2. Number of dummy cycles depends on clock speed. Detailed information in Table 6.11 Read Dummy Cycles.
3. Sufficient dummy cycles are required to avoid I/O contention. If the number of dummy cycles and AX bits cycles
are same, then X should be Hi-Z.
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FAST READ QUAD IO DTR QPI MODE OPERATION (FRQDTR QPI, EDh OR 4FRQDTR QPI, EEh)
The FRQDTR/4FRQDTR QPI instruction utilizes all four IO lines to input the instruction code so that only two
clocks are required, while the FRQDTR/4FRQDTR instruction requires that the byte-long instruction code is
shifted into the device only via IO0 line in eight clocks. As a result, 6 command cycles will be reduced by the
FRQDTR/4FRQDTR QPI instruction. In addition, subsequent address and data out are shifted in/out via all four
IO lines like the FRQDTR/4FRQDTR instruction. In fact, except for the command cycle, the FRQDTR/4FRQDTR
QPI operation is exactly same as the FRQDTR/4FRQDTR. A Quad Enable (QE) bit of Status Register must be
set to "1" before sending the FRQDTR/4FRQDTR QPI instruction.
• EDh (EXTADD=0) is followed by a 3-byte address (A23-A0) or
• EDh (EXTADD=1) is followed by a 4-byte address (A31-A0) or
• EEh is followed by a 4-byte address (A31-A0)
The sequence of issuing FRQDTR/4FRQDTR QPI instruction is: CE# goes low  Sending FRQDTR/4FRQDTR
QPI instruction (4-bit per clock)  24-bit or 32-bit address interleave on IO3, IO2, IO1 & IO0 (8-bit per clock) as
above  6 dummy clocks (configurable, default is 6 clocks)  Data out interleave on IO3, IO2, IO1 & IO0 (8-bit
per clock)  End FRQDTR/4FRQDTR QPI operation by driving CE# high at any time during data out.
If AXh (where X is don’t care) is input for the mode bits during dummy cycles, the device will enter AX read
operation mode which enables subsequent FRQDTR/4FRQDTR QPI execution skips command code. It saves
cycles as described in Figures 8.92 and 8.93. When the code is different from AXh (where X is don’t care), the
device exits the AX read operation. After finishing the read operation, device becomes ready to receive a new
command.
If the FRQDTR/4FRQDTR QPI instruction is issued while an Erase, Program or Write cycle is in process is in
progress (WIP=1), the instruction will be rejected without any effect on the current cycle.
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Figure 8.94 FRQDTR QPI Sequence (EDh [EXTADD=0], 3-byte address)
CE #
Mode 3 0
1
2
3
4
5
6
7
8
9
10
11
12
...
SCK
Mode 0
IO0
IO1
IO2
IO3
Instruction
= EDh
6 Dummy Cycles
3-byte Address
tV
Data Data
Out Out
4
0
20 16 12 8 4 0 4 0
4 0 4 0 ...
5
1
21 17 13 9 5 1 5 1
5 1 5 1 ...
6
2
22 18 14 10 6 2 6 2
6 2 6 2 ...
7
3
23 19 15 11 7 3 7 3
7 3 7 3 ...
Mode Bits
Notes:
1. If the mode bits=AXh (where X is don’t care), it can execute the AX read mode (without command). When the
mode bits are different from AXh, the device exits the AX read operation.
2. Number of dummy cycles depends on clock speed. Detailed information in Table 6.11 Read Dummy Cycles.
3. Sufficient dummy cycles are required to avoid I/O contention. If the number of dummy cycles and AX bits cycles
are same, then X should be Hi-Z.
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Figure 8.95 FRQDTR QPI Sequence (EDh [EXTADD=1] or EEh, 4-byte address)
CE #
Mode 3 0
1
2
3
4
5
6
7
8
9
10
11
12
...
SCK
Mode 0
IO0
IO1
IO2
IO3
Instruction
= EDh/EEh
6 Dummy Cycles
4-byte Address
tV
Data
Out
4
0
28 24 20 16 12 8 4 0 4 0
4 0 ...
5
1
29 25 21 17 13 9 5 1 5 1
5 1 ...
6
2
30 26 22 18 14 10 6 2 6 2
6 2 ...
7
3
31 27 23 19 15 11 7 3 7 3
7 3 ...
Mode Bits
Notes:
1. If the mode bits=AXh (where X is don’t care), it can execute the AX read mode (without command). When the
mode bits are different from AXh, the device exits the AX read operation.
2. Number of dummy cycles depends on clock speed. Detailed information in Table 6.11 Read Dummy Cycles.
3. Sufficient dummy cycles are required to avoid I/O contention. If the number of dummy cycles and AX bits cycles
are same, then X should be Hi-Z.
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8.45 SECTOR LOCK/UNLOCK FUNCTIONS
SECTOR UNLOCK OPERATION (SECUNLOCK, 26h or 4SECUNLOCK, 25h)
The Sector Unlock command allows the user to select a specific sector to allow program and erase operations.
This instruction is effective when the blocks are designated as write-protected through the BP0-BP3 bits in the
Status Register and TBS bit in the Function Register. Only one sector can be enabled at any time. To enable a
different sector, a previously enabled sector must be disabled by executing a Sector Lock command.
• 26h (EXTADD=0) is followed by a 3-byte address (A23-A0) or
• 26h (EXTADD=1) is followed by a 4-byte address (A31-A0) or
• 25h is followed by a 4-byte address (A31-A0)
The instruction code is followed by a 24-bit or 32-bit address specifying the target sector as above, but A0
through A11 are not decoded. The remaining sectors within the same block remain as read-only.
Figure 8.96 Sector Unlock Sequence (26h [EXTADD=0], 3-byte address)
CE #
Mode 3 0
1
2
3
4
5
6
7
8
9
10
...
28
29
30
31
2
1
0
37
38
39
1
0
SCK
Mode 0
3-byte Address
SI
Instruction = 26h
23
22
21
...
3
High Impedance
SO
Figure 8.97 Sector Unlock Sequence (26h [EXTADD=1] or 25h, 4-byte address)
CE #
Mode 3 0
1
2
3
4
5
6
7
8
9
10
...
36
SCK
Mode 0
4-byte Address
SI
SO
Instruction = 26h/25h
31
30
29
...
3
2
High Impedance
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Figure 8.98 Sector Unlock QPI Sequence (26h [EXTADD=0], 3-byte address)
CE#
Mode 3 0
1
2
3
4
6
7
7:4
3:0
5
SCK
Mode 0
3-byte Address
Instruction
IO[3:0]
23:20 19:16 15:12 11:8
26h
Figure 8.99 Sector Unlock QPI Sequence (26h [EXTADD=1] or 25h, 4-byte address)
CE#
Mode 3 0
1
2
3
4
5
6
7
8
9
7:4
3:0
SCK
Mode 0
IO[3:0]
4-byte Address
26h/25h
31:28 27:24 23:20 19:16 15:12 11:8
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SECTOR LOCK OPERATION (SECLOCK, 24h)
The Sector Lock command relocks a sector that was previously unlocked by the Sector Unlock command. The
instruction code does not require an address to be specified, as only one sector can be enabled at a time. The
remaining sectors within the same block remain in read-only mode.
Figure 8.100 Sector Lock Sequence
CE#
Mode 3
0
1
2
3
4
5
6
7
SCK
Mode 0
Instruction = 24h
SI
High Impedance
SO
Figure 8.101 Sector Lock QPI Sequence
CE#
Mode 3 0
1
SCK
Mode 0
IO[3:0]
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8.46 AUTOBOOT
SPI devices normally require 32 or more cycles of command and address shifting to initiate a read command.
And, in order to read boot code from an SPI device, the host memory controller or processor must supply the
read command from a hardwired state machine or from some host processor internal ROM code.
Parallel NOR devices need only an initial address, supplied in parallel in a single cycle, and initial access time to
start reading boot code.
The AutoBoot feature allows the host memory controller to take boot code from the device immediately after the
end of reset, without having to send a read command. This saves 32 or more cycles and simplifies the logic
needed to initiate the reading of boot code.
• As part of the Power-up Reset, Hardware Reset, or Software Reset process the AutoBoot feature
automatically starts a read access from a pre-specified address. At the time the reset process is completed,
the device is ready to deliver code from the starting address. The host memory controller only needs to drive
CE# signal from high to low and begin toggling the SCK signal. The device will delay code output for a prespecified number of clock cycles before code streams out.
– The Auto Boot Start Delay (ABSD) field of the AutoBoot register specifies the initial delay if any is needed
by the host.
– The host cannot send commands during this time.
– If QE bit (Bit 6) in the Status Register is set to “1”, Quad IO Read operation will be selected. If it is set to
“0”, fast read SPI operation will be applied. Maximum operation frequency will be 166MHz for both
operations.
• The starting address of the boot code is selected by the value programmed into the AutoBoot Start Address
(ABSA) field of the AutoBoot Register.
– Data will continuously shift out until CE# returns high.
• At any point after the first data byte is transferred, when CE# returns high, the SPI device will reset to
standard SPI mode; able to accept normal command operations.
– A minimum of one byte must be transferred.
– AutoBoot mode will not initiate again until another power cycle or a reset occurs.
• An AutoBoot Enable bit (ABE) is set to enable the AutoBoot feature.
The AutoBoot register bits are non-volatile and provide:
• The starting address set by the AutoBoot Start Address (ABSA).
• The number of initial delay cycles, set by the AutoBoot Start Delay (ABSD) 4-bit count value.
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Figure 8.102 AutoBoot Sequence (QE = 0)
CE #
Mode 3
0
1
2
...
n-1
n
n+2
n+1
n+3
n+4
n+5
n+6
n+7
n+8
n+9
...
n+10
SCK
Mode 0
SI
ABSD Delay (n)
tV
SO
7
6
5
3
4
2
1
0
7
...
6
High Impedance
Data Out 1
Data Out 2
...
Figure 8.103 AutoBoot Sequence (QE = 1)
CE #
Mode 3
0
1
2
...
n-1
n
n+2
n+1
n+3
n+4
n+5
n+6
n+7
n+9
n+8
n+10
...
SCK
Mode 0
ABSD Delay (n)
tV
IO0
4
0
4
0
4
0
4
0
4
0
...
IO1
5
1
5
1
5
1
5
1
5
1
...
IO2
6
2
6
2
6
2
6
2
6
2
...
IO3
7
3
7
3
7
3
7
3
7
3
...
High Impedance
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...
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AUTOBOOT REGISTER READ OPERATION (RDABR, 14h)
The AutoBoot Register Read command is shifted in. Then the 32bit AutoBoot Register is shifted out, least
significant byte first, most significant bit of each byte first. It is possible to read the AutoBoot Register
continuously by providing multiples of 32bits.
Figure 8.104 RDABR Sequence (QE = 1)
CE #
Mode 3
0
1
2
3
4
5
7
6
8
9
10
11
12
13
14
...
15
SCK
Mode 0
SI
Instruction = 14h
tV
SO
7
6
5
4
3
2
1
0
Data Out 1
Figure 8.105 RDABR QPI Sequence (QE = 1)
CE#
Mode 3 0
1
2
...
3
SCK
Mode 0
tV
IO[3:0]
14h
7:4
3:0
...
Data Out
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AUTOBOOT REGISTER WRITE OPERATION (WRABR, 15h)
Before the WRABR command can be accepted, a Write Enable (WREN) command must be issued and
decoded by the device, which sets the Write Enable Latch (WEL) in the Status Register to enable any write
operations.
The WRABR command is entered by shifting the instruction and the data bytes, least significant byte first, most
significant bit of each byte first. The WRABR data is 32bits in length.
CE# must be driven high after the 32nd bit of data has been latched. If not, the WRABR command is not
executed. As soon as CE# is driven high, the WRABR operation is initiated. While the WRABR operation is in
progress, Status Register or Extended Read Register may be read to check the value of the Write In Progress
(WIP) bit. The WIP bit is “1” during the WRABR operation, and is “0” when it is completed. When the WRABR
cycle is completed, the WEL is set to “0”.
Figure 8.106 WRABR Sequence (QE = 1)
CE #
Mode 3
0
1
2
3
4
5
7
6
8
9
10
11
12
13
14
15
7
6
5
4
3
2
1
0
...
SCK
Mode 0
SI
Instruction = 15h
...
Data In 1
SO
High Impedance
Figure 8.107 WRABR QPI Sequence (QE = 1)
CE#
Mode 3 0
1
2
3
7:4
3:0
...
SCK
Mode 0
IO[3:0]
15h
...
Data In 1
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8.47 READ BANK ADDRESS REGISTER OPERATION (RDBR: 16h/C8h)
The Read Bank Address Register (RDBR) instruction allows the Bank Address Register contents to be read.
RDRP is used to read only a volatile Bank Address Register.
The instruction code is first shifted in. Then the 8-bit Bank Register is shifted out. It is possible to read the Bank
Address Register continuously by providing multiples of eight bits. The maximum operating clock frequency for
the RDBR command is 166MHz.
Data is shifted in from SI and data is shifted out from SO in SPI sequence whereas data in and out is via four
pins (IO0-IO3) in QPI sequence.
Figure 8.108 Read Bank Address Register Sequence
CE #
Mode 3 0
1
2
3
4
5
7
6
8
9
10
11
12
13
14
15
SCK
Mode 0
SI
Instruction = 16h/C8h
tV
SO
Data Out
7
6
5
4
3
2
1
0
Figure 8.109 Read Bank Address Register QPI Sequence
CE#
Mode 3 0
2
1
3
SCK
Mode 0
tV
IO[3:0]
16h/C8h
7:4
3:0
Data Out
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8.48 WRITE BANK ADDRESS REGISTER OPERATION (WRBRNV: 18h, WRBRV: 17h/C5h)
The Write Bank Address Register (WRBRNV and WRBRV) instruction is used to write address bits above A23,
into the Bank Address Register (BAR). WRBRNV is used to write the non-volatile Bank Address Register and
WRBRV is used to write the volatile Bank Address Register. The instruction is also used to write the Extended
Address Control bit (EXTADD) that is also in BAR[7]. BAR provides the high order addresses needed by
devices having more than 128Mbits (16Mbytes), when using 3-byte address commands without extended
addressing enabled (BAR[7] EXTADD = 0).
WRBRNV requires the Write Enable (WREN) command to precede it while WRBRV does not require WREN
command.
The WRBRNV/WRBRV instruction is entered, followed by the data byte. The Bank Address Register is one data
byte in length. The WRBRNV/WRBRV command has no effect on the Write In Progress (WIP) bit. Any bank
address bit reserved for the future should always be written as “0”. Data is shifted in from SI and in SPI whereas
data is shifted in via four pins (IO0-IO3) in QPI.
Note: When WRBRNV is executed, the volatile Bank Address Register is set as well as the non-volatile Bank
Address Register.
Figure 8.110 Write Bank Address Register Sequence
CE #
Mode 3 0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
2
1
0
SCK
Mode 0
Data In
SI
SO
Instruction = 18h or 17h/C5h
7
6
2
3
7:4
3:0
5
4
3
High Impedence
Figure 8.111 Write Bank Address Register QPI Sequence
CE#
Mode 3 0
1
SCK
Mode 0
IO[3:0]
18h or
17h/C5h
Data In
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8.49 ENTER 4-BYTE ADDRESS MODE OPERATION (EN4B, B7h)
The Enter 4-byte Address Mode instruction allows 32bit address (A31-A0) to be used to access the memory
array beyond 128Mb. To execute EN4B operation, the host drives CE# low, sends the instruction code and then
drives CE# high. The Exit 4-byte Address Mode instruction can be used to exit the 4-byte address mode.
Note: The EN4B instruction will set the Bit 7 (EXTADD) of the volatile Bank Address Register to “1”, but will not
change the non-volatile Bank Address Register.
Figure 8.112 Enter 4-byte Address Mode Sequence
CE#
Mode 3
0
1
2
3
4
5
6
7
SCK
Mode 0
Instruction = B7h
SI
High Impedance
SO
Figure 8.113 Enter 4-byte Address Mode QPI Sequence
CE#
Mode 3 0
1
SCK
Mode 0
IO[3:0]
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8.50 EXIT 4-BYTE ADDRESS MODE OPERATION (EX4B, 29h)
In order to be backward compatible, the Exit 4-byte Address Mode instruction allows 24bit address (A23-A0) to
be used to access the memory array up to 128Mb. The Bank Address Register must be used to access the
memory array beyond 128Mb. To execute EX4B operation, the host drives CE# low, sends the instruction code
and then drives CE# high.
Note: The EX4B instruction will reset the Bit 7 (EXTADD) of the volatile Bank Address Register to “0” ”, but will not
change the non-volatile Bank Address Register.
Figure 8.114 Exit 4-byte Address Mode Sequence
CE#
Mode 3
0
1
2
3
4
5
6
7
SCK
Mode 0
Instruction = 29h
SI
High Impedance
SO
Figure 8.115 Exit 4-byte Address Mode QPI Sequence
CE#
Mode 3 0
1
SCK
Mode 0
IO[3:0]
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8.51 READ DYB OPERATION (RDDYB, FAh or 4RDDYB, E0h)
FAh (EXTADD=0) is followed by a 3-byte address (A23-A0) or
• FAh (EXTADD=1) is followed by a 4-byte address (A31-A0) or
• E0h is followed by a 4-byte address (A31-A0)
The instruction is used to read Dynamic Protection Bit (DYB) status of the given sector/block. The instruction
code is entered first, followed by the 24-bit or 32-bit address selecting location zero within the desired
sector/block as above. Then the 8-bit DYB access register contents are shifted out. Each bit (SPI) or four bits
(QPI) are shifted out at the SCK frequency by the falling edge of the SCK signal. It is possible to read the same
DYB access register continuously by providing multiples of eight bits. The address of the DYB register does not
increment so this is not a means to read the entire DYB array. Each location must be read with a separate Read
DYB instruction. The maximum operating clock frequency for READ command is 166MHz.
Note: The high order address bits not used by 256M must be zero.
Figure 8.116 Read DYB Sequence (FAh [EXTADD=0], 3-byte address)
CE #
Mode 3 0
1
...
7
8
9
...
31
32
33
34
35
36
37
38
39
SCK
Mode 0
SI
Instruction = FAh
3-byte Address
tV
SO
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6
5
4
3
2
1
0
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Figure 8.117 Read DYB Sequence (FAh [EXTADD=1] or E0h, 4-byte address)
CE #
Mode 3 0
1
...
7
8
9
39
...
40
41
42
43
44
45
46
47
SCK
Mode 0
SI
Instruction = FAh/E0h
4-byte Address
tV
SO
7
6
5
3
4
2
1
0
Figure 8.118 Read DYB QPI Sequence (FAh [EXTADD=0], 3-byte address)
CE#
Mode 3 0
1
2
3
4
5
6
7
8
9
SCK
Mode 0
tV
3-byte Address
FAh
IO[3:0]
Data Out
Figure 8.119 Read DYB QPI Sequence (FAh [EXTADD=0] or E0h, 4-byte address)
CE#
Mode 3 0
1
2
3
4
5
6
7
8
9
10
11
SCK
Mode 0
tV
IO[3:0]
FAh/E0h
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Data Out
139
IS25LP256, IS25WP256
8.52 WRITE DYB OPERATION (WRDYB, FBh or 4WRDYB, E1h)
Before the Write DYB (WRDYB) command can be accepted by the device, a Write Enable (WREN) command
must be issued. After the WREN command has been decoded, the device will set the Write Enable Latch (WEL)
in the Status Register to enable any write operations.
• FBh (EXTADD=0) is followed by a 3-byte address (A23-A0) or
• FBh (EXTADD=1) is followed by a 4-byte address (A31-A0) or
• E1h is followed by a 4-byte address (A31-A0)
The WRDYB command is entered by driving CE# low, followed by the instruction code, the 24-bit or 32-bit
address selecting location zero within the desired sector/block as above, then the data byte. The DYB Access
Register is one data byte in length.
The WRDYB command affects the WIP bit of the Status in the same manner as any other programming
operation. CE# must be driven high after the eighth bit of data has been latched in. As soon as CE# is driven
high, the WRDYB operation is initiated. While the WRDYB operation is in progress, the Status Register or
Extended Read Register may be read to check the value of the Write In Progress (WIP) bit. The WIP bit is “1”
during the WRDYB operation, and is “0” when it is completed. When the WRDYB operation is completed, the
WEL is set to “0”.
Note: The high order address bits not used by 256M must be zero.
Figure 8.120 Write DYB Sequence (FBh [EXTADD=0], 3-byte address)
CE #
Mode 3 0
1
...
7
8
9
...
31
32
33
34
35
36
37
38
39
2
1
0
SCK
Mode 0
Data In
SI
SO
Instruction = FBh
3-byte Address
7
6
5
4
3
High Impedence
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IS25LP256, IS25WP256
Figure 8.121 Write DYB Sequence (FBh [EXTADD=1] or E1h, 4-byte address)
CE #
Mode 3 0
1
...
7
8
9
39
...
40
41
42
43
44
45
46
47
2
1
0
SCK
Mode 0
Data In
SI
Instruction = FBh/E1h
4-byte Address
7
6
5
4
3
High Impedence
SO
Figure 8.122 Write DYB QPI Sequence (FBh [EXTADD=0], 3-byte address)
CE#
Mode 3 0
1
2
3
4
5
6
7
8
9
SCK
Mode 0
3-byte Address
FBh
IO[3:0]
Data In
Figure 8.123 Write DYB QPI Sequence (FBh [EXTADD=1] or E1h, 4-byte address)
CE#
Mode 3 0
1
2
3
4
5
6
7
8
9
10
11
SCK
Mode 0
IO[3:0]
FBh/E1h
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Data In
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IS25LP256, IS25WP256
8.53 READ PPB OPERATION (RDPPB, FCh or 4RDPPB, E2h)
FCh (EXTADD=0) is followed by a 3-byte address (A23-A0) or
FCh (EXTADD=1) is followed by a 4-byte address (A31-A0) or
E2h is followed by a 4-byte address (A31-A0)
The instruction code is shifted into SI by the rising edges of the SCK signal, followed by the 24-bit or 32-bit
address selecting location zero within the desired sector/block as above. Then the 8-bit PPB Access Register
contents are shifted out on SO. The RDPPB/4RDPPB is supporting only SPI, not supporting QPI.
It is possible to read the same PPB Access Register continuously by providing multiples of eight bits. The
address of the PPB Access Register does not increment so this is not a means to read the entire PPB array.
Each location must be read with a separate Read PPB command. The maximum operating clock frequency for
the Read PPB command is 166MHz.
Note: The high order address bits not used by 256M must be zero.
Figure 8.124 Read PPB Sequence (FCh [EXTADD=0], 3-byte address)
CE #
Mode 3 0
1
...
7
8
9
...
31
32
33
34
35
36
37
38
39
SCK
Mode 0
SI
Instruction = FCh
3-byte Address
tV
SO
7
6
5
2
3
4
1
0
Figure 8.125 Read PPB Sequence (FCh [EXTADD=1] or E2h, 4-byte address)
CE #
Mode 3 0
1
...
7
8
9
...
39
40
41
42
43
44
45
46
47
SCK
Mode 0
SI
Instruction = FCh/E2h
4-byte Address
tV
SO
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6
5
4
3
2
1
0
142
IS25LP256, IS25WP256
8.54 PROGRAM PPB OPERATION (PGPPB, FDh or 4PGPPB, E3h)
Before the Program PPB (PGPPB/4PGPPB) command is sent, a Write Enable (WREN) command must be
issued. After the WREN command has been decoded, the device will set the Write Enable Latch (WEL) in the
Status Register.
FDh (EXTADD=0) is followed by a 3-byte address (A23-A0) or
FDh (EXTADD=1) is followed by a 4-byte address (A31-A0) or
E3h is followed by a 4-byte address (A31-A0)
The PGPPB/4PGPPB command is entered by driving CE# low, followed by the instruction code, followed by the
24-bit or 32-bit address selecting location zero within the desired sector/block as above.
The PGPPB/4PGPPB command affects the WIP bit in the same manner as any other programming operation.
CE# must be driven high after the last bit of address has been latched in. As soon as CE# is driven high, the
PGPPB/4PGPPB operation is initiated. While the PGPPB/4PGPPB operation is in progress, the Status Register
or Extended Read Register may be read to check the value of the Write In Progress (WIP) bit. The WIP bit is “1”
during the PGPPB/4PGPPB operation, and is “0” when it is completed. When the PGPPB/4PGPPB operation is
completed, the WEL is set to “0”.
Note: The high order address bits not used by 256M must be zero.
Figure 8.126 Program PPB Sequence (FDh [EXTADD=0], 3-byte address)
CE #
Mode 3 0
1
...
7
8
9
...
31
SCK
Mode 0
SI
Instruction = FDh
3-byte Address
High Impedence
SO
Figure 8.127 Program PPB Sequence (FDh [EXTADD=1] or E3h, 4-byte address)
CE #
Mode 3 0
1
...
7
8
9
...
39
SCK
Mode 0
SI
Instruction = FDh/E3h
SO
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High Impedence
143
IS25LP256, IS25WP256
Figure 8.128 Program PPB QPI Sequence (FDh [EXTADD=0], 3-byte address)
CE#
Mode 3 0
1
2
3
4
5
6
7
SCK
Mode 0
3-byte Address
FDh
IO[3:0]
Figure 8.129 Program PPB QPI Sequence (FDh [EXTADD=1] or E3h, 4-byte address)
CE#
Mode 3 0
1
2
3
4
5
6
7
8
9
SCK
Mode 0
IO[3:0]
FDh/E3h
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IS25LP256, IS25WP256
8.55 ERASE PPB OPERATION (ERPPB, E4h)
The Erase PPB (ERPPB) command sets all PPB bits to “1”. Before the ERPPB command can be accepted by
the device, a Write Enable (WREN) command must be issued and decoded by the device, which sets the Write
Enable Latch (WEL) in the Status Register to enable any write operations.
The instruction code is shifted in by the rising edges of the SCK signal. CE# must be driven high after the eighth
bit of the instruction byte has been latched in. This will initiate the beginning of internal erase cycle, which
involves the pre-programming and erase of the entire PPB memory array. Without CE# being driven high after
the eighth bit of the instruction, the PPB erase operation will not be executed.
With the internal erase cycle in progress, the user can read the value of the Write In Progress (WIP) bit to check
if the operation has been completed. The WIP bit will indicate “1” when the erase cycle is in progress and “0”
when the erase cycle has been completed. When the ERPPB operation is completed, the WEL is set to “0”.
Erase suspend is not allowed during PPB Erase.
Figure 8.130 Erase PPB Sequence
CE#
Mode 3
0
1
2
3
4
5
6
7
SCK
Mode 0
Instruction = E4h
SI
High Impedance
SO
Figure 8.131 Erase PPB QPI Sequence
CE#
Mode 3 0
1
SCK
Mode 0
IO[3:0]
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145
IS25LP256, IS25WP256
8.56 READ ASP OPERATION (RDASP, 2Bh)
The RDASP instruction code is shifted in by the rising edge of the SCK signal. Then the 16-bit ASP register
contents is shifted out, least significant byte first, most significant bit of each byte first. Each bit is shifted out at
the SCK frequency by the falling edge of the SCK signal. It is possible to read the ASP register continuously by
providing multiples of 16 bits. The maximum operating clock frequency for the RDASP command is 166MHz.
Figure 8.132 Read ASP Sequence
CE #
Mode 3 0
1
2
3
4
5
8
7
6
9
...
15
16
17
...
23
SCK
Mode 0
SI
Instruction = 2Bh
1st byte Data Out
tV
SO
7
...
6
2nd byte Data Out
0
15
14
...
8
Figure 8.133 Read ASP QPI Sequence
CE#
Mode 3 0
1
2
3
4
5
SCK
Mode 0
tV
IO[3:0]
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1st byte
Data Out
2nd byte
Data Out
146
IS25LP256, IS25WP256
8.57 PROGRAM ASP OPERATION (PGASP, 2Fh)
Before the Program ASP (PGASP) command can be accepted by the device, a Write Enable (WREN) command
must be issued. After the WREN command has been decoded, the device will set the Write Enable Latch (WEL)
in the Status Register to enable any write operations.
The PGASP command is entered by driving CE# low, followed by the instruction code and two data bytes, least
significant byte first, most significant bit of each byte first. The ASP Register is two data bytes in length. The
PGASP command affects the Write In Progress (WIP) bit in the same manner as any other programming
operation.
CE# input must be driven high after the sixteenth bit of data has been latched in. If not, the PGASP command is
not executed. As soon as CE# is driven high, the PGASP operation is initiated. While the PGASP operation is in
progress, the Status Register or the Extended Read Register may be read to check the value of WIP bit. The
WIP bit is “1” during the PGASP operation, and is “0” when it is completed. When the PGASP operation is
completed, the WEL is set to “0”.
Figure 8.134 Program ASP Sequence
CE #
Mode 3 0
1
...
7
8
9
...
13
14
15
16
17
...
21
22
23
9
8
SCK
Mode 0
SI
1st byte Data In
Instruction = 2Fh
7
6
2nd byte Data In
...
2
1
0
15
1
2
3
4
5
14
...
10
High Impedence
SO
Figure 8.135 Program ASP QPI Sequence
CE#
Mode 3 0
SCK
Mode 0
IO[3:0]
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1st byte
Data In
2nd byte
Data In
147
IS25LP256, IS25WP256
8.58 READ PPB LOCK BIT OPERATION (RDPLB, A7h)
The Read PPB Lock Bit (RDPLB) command allows the PPB Lock Register contents to be read. It is possible to
read the PPB Lock Register continuously by providing multiples of eight bits. The PPB Lock Register contents
may only be read when the device is in standby state with no other operation in progress. It is recommended to
check the Write In Progress (WIP) bit before issuing a new command to the device.
Figure 8.136 Read PPB Lock Bit Sequence
CE #
Mode 3 0
1
2
3
4
5
7
6
8
9
10
11
12
13
14
15
SCK
Mode 0
SI
Instruction = A7h
tV
SO
Data Out
7
6
5
4
3
2
1
0
Figure 8.137 Read PPB Lock Bit QPI Sequence
CE#
Mode 3 0
1
2
3
SCK
Mode 0
tV
IO[3:0]
A7h
7:4
3:0
Data Out
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IS25LP256, IS25WP256
8.59 WRITE PPB LOCK BIT OPERATION (WRPLB, A6h)
The Write PPB Lock Bit (WRPLB) command clears the PPB Lock (PPBLK) bit to zero. Before the WRPLB
command can be accepted by the device, a Write Enable (WREN) command must be issued and decoded by
the device, which sets the Write Enable Latch (WEL) in the Status Register to enable any write operations.
The WRPLB command is entered by driving CE# low, followed by the instruction code. CE# must be driven high
after the eighth bit of instruction has been latched in. If not, the WRPLB command is not executed. As soon as
CE# is driven high, the WRPLB operation is initiated. While the WRPLB operation is in progress, the Status
Register or Extended Read Register may still be read to check the value of the Write In Progress (WIP) bit. The
WIP bit is “1” during the WRPLB operation, and is “0” when it is completed. When the WRPLB operation is
completed, the WEL is set to “0”. The maximum clock frequency for the WRPLB command is 166MHz.
Figure 8.138 Write PPB Lock Bit Sequence
CE#
Mode 3
0
1
2
3
4
5
6
7
SCK
Mode 0
Instruction = A6h
SI
High Impedance
SO
Figure 8.139 Write PPB Lock Bit QPI Sequence
CE#
Mode 3 0
1
SCK
Mode 0
IO[3:0]
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149
IS25LP256, IS25WP256
8.60 SET FREEZE BIT OPERATION (SFRZ, 91h)
The Set FREEZE Bit (SFRZ) command sets FREEZE (PPB Lock Register bit7) to one. Please refer to the
section 6.6.3 PPB Lock Register for more detail. Before the SFRZ command can be accepted by the device, a
Write Enable (WREN) command must be issued and decoded by the device, which sets the Write Enable Latch
(WEL) in the Status Register to enable any write operations.
The SFRZ command is entered by driving CE# low, followed by the instruction code. CE# must be driven high
after the eighth bit of instruction has been latched in. If not, the SFRZ command is not executed. As soon as
CE# is driven high, the SFRZ operation is initiated. While the SFRZ operation is in progress, the Status Register
or Extended Read Register may still be read to check the value of the Write In Progress (WIP) bit. The WIP bit
is “1” during the SFRZ operation, and is “0” when it is completed. When the SFRZ operation is completed, the
WEL is set to “0”. The maximum clock frequency for the SFRZ command is 166MHz.
Figure 8.140 Set FREEZE Bit Sequence
CE#
Mode 3
0
1
2
3
4
5
6
7
SCK
Mode 0
Instruction = A6h
SI
High Impedance
SO
Figure 8.141 Set FREEZE Bit QPI Sequence
CE#
Mode 3 0
1
SCK
Mode 0
IO[3:0]
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150
IS25LP256, IS25WP256
8.61 READ PASSWORD OPERATION (RDPWD, E7h)
The correct password value may be read only after it is programmed and before the Password Mode has been
selected by programming the Password Protection Mode bit to “0” in the ASP Register (ASP[2]). After the
Password Protection Mode is selected the RDPWD command is ignored.
The RDPWD command is shifted in. Then the 64-bit Password is shifted out, least significant byte first, most
significant bit of each byte first. Each bit is shifted out at the SCK frequency by the falling edge of the SCK signal.
It is possible to read the Password continuously by providing multiples of 64bits. The maximum operating clock
frequency for the RDPWD command is 166MHz.
Figure 8.142 Read password Sequence
CE #
Mode 3 0
1
...
7
8
9
15
...
16
17
...
23
...
64
65
71
...
SCK
Mode 0
SI
Instruction = E7h
1st byte Data Out
tV
SO
7
6
...
...
2nd byte Data Out
0
15
14
...
8
...
8th byte Data Out
63
62
...
Figure 8.143 Read Password QPI Sequence
CE#
Mode 3 0
1
2
3
4
5
...
16
17
SCK
Mode 0
tV
IO[3:0]
E7h
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Data In
2nd byte
Data In
...
8th byte
Data In
151
56
IS25LP256, IS25WP256
8.62 PROGRAM PASSWORD OPERATION (PGPWD, E8h)
Before the Program Password (PGPWD) command can be accepted by the device, a Write Enable (WREN)
command must be issued and decoded by the device which sets the Write Enable Latch (WEL) to enable the
PGPWD operation. The password can only be programmed before the Password Mode is selected by
programming the Password Protection Mode bit to “0” in the ASP Register (ASP[2]). After the Password
Protection Mode is selected the PGPWD command is ignored.
The PGPWD command is entered by driving CE# low, followed by the instruction code and the password data
bytes, least significant byte first, most significant bit of each byte first. The password is 64bits in length.
th
CE# must be driven high after the 64 bit of data has been latched. If not, the PGPWD command is not
executed. As soon as CE# is driven high, the PGPWD operation is initiated. While the PGPWD operation is in
progress, the Status Register or Extended Read Register may be read to check the value of the Write In
Progress (WIP) bit. The WIP bit is “1” during the PGPWD operation, and is “0” when it is completed. When the
PGPWD operation is completed, the Write Enable Latch (WEL) is set to “0”. The maximum clock frequency for
the PGPWD command is 166MHz.
Figure 8.144 Program Password Sequence
CE #
Mode 3 0
1
...
7
8
9
15
...
16
17
...
23
...
64
65
71
...
SCK
Mode 0
1st byte Data In
SI
Instruction = E8h
7
...
6
...
2nd byte Data In
...
14
15
0
...
8
8th byte Data In
63
62
...
56
High Impedence
SO
Figure 8.145 Program Password QPI Sequence
CE#
Mode 3 0
1
2
3
5
...
2nd byte
Data In
...
4
16
17
SCK
Mode 0
IO[3:0]
E8h
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Data In
8th byte
Data In
152
IS25LP256, IS25WP256
8.63 UNLOCK PASSWORD OPERATION (UNPWD, E9h)
The UNPWD command is entered by driving CE# low, followed by the instruction code and the password data
bytes, least significant byte first, most significant bit of each byte first. The password is 64bits in length.
th
CE# must be driven high after the 64 bit of data has been latched. If not, the UNPWD command is not
executed. As soon as CE# is driven high, the UNPWD operation is initiated. While the UNPWD operation is in
progress, the Status Register or Extended Read Register may be read to check the value of the Write In
Progress (WIP) bit. The WIP bit is “1” during the UNPWD operation, and is “0” when it is completed.
If the UNPWD command supplied password does not match the hidden password in the Password Register, the
UNPWD command is ignored. This returns the device to standby state, ready for a new command such as a
retry of the UNPWD command. If the password does match, the PPB Lock bit is set to “1”. The maximum clock
frequency for the UNPWD command is 166MHz.
Figure 8.146 Unlock Password Sequence
CE #
Mode 3 0
1
...
7
8
9
15
...
16
17
...
23
...
64
65
71
...
SCK
Mode 0
1st byte Data In
SI
Instruction = E9h
7
...
6
...
2nd byte Data In
...
14
15
0
...
8
8th byte Data In
63
62
...
56
High Impedence
SO
Figure 8.147 Unlock Password QPI Sequence
CE#
Mode 3 0
1
2
3
5
...
2nd byte
Data In
...
4
16
17
SCK
Mode 0
IO[3:0]
E9h
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Data In
8th byte
Data In
153
IS25LP256, IS25WP256
8.64 GANG SECTOR/BLOCK LOCK OPERATION (GBLK, 7Eh)
The Gang Sector/Block Lock (GBLK) instruction provides a quick method to set all DYB (Dynamic Protection Bit)
bits to “0” at once.
The sequence of issuing GBLK instruction is: drive CE# low  send GBLK instruction code  drive CE# high.
The instruction code will be shifted into the device on the rising edge of SCK.
The GBLK command is accepted in both SPI and QPI mode. The CE# must go high exactly at the byte
boundary, otherwise, the instruction will be ignored.
Figure 8.148 Gang Sector/Block Lock Sequence
CE#
Mode 3
0
1
2
3
4
5
6
7
SCK
Mode 0
Instruction = 7Eh
SI
High Impedance
SO
Figure 8.149 Gang Sector/Block Lock QPI Sequence
CE#
Mode 3 0
1
SCK
Mode 0
IO[3:0]
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7Eh
154
IS25LP256, IS25WP256
8.65 GANG SECTOR/BLOCK UNLOCK OPERATION (GBUN, 98h)
The Gang Sector/Block Unlock (GBUN) instruction provides a quick method to clear all DYB (Dynamic
Protection Bit) bits to “1” at once.
The sequence of issuing GBUN instruction is: drive CE# low  send GBUN instruction code  drive CE# high.
The instruction code will be shifted into the device on the rising edge of SCK.
The GBUN command is accepted in both SPI and QPI mode. The CE# must go high exactly at the byte
boundary, otherwise, the instruction will be ignored and not be executed.
Figure 8.150 Gang Sector/Block Unlock Sequence
CE#
Mode 3
0
1
2
3
4
5
6
7
SCK
Mode 0
Instruction = 98h
SI
High Impedance
SO
Figure 8.151 Gang Sector/Block Unlock QPI Sequence
CE#
Mode 3 0
1
SCK
Mode 0
IO[3:0]
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98h
155
IS25LP256, IS25WP256
9. ELECTRICAL CHARACTERISTICS
9.1 ABSOLUTE MAXIMUM RATINGS
(1)
Storage Temperature
-65°C to +150°C
Surface Mount Lead Soldering Temperature
Standard Package
240°C 3 Seconds
Lead-free Package
260°C 3 Seconds
Input Voltage with Respect to Ground on All Pins
-0.5V to VCC + 0.5V
All Output Voltage with Respect to Ground
-0.5V to VCC + 0.5V
VCC
IS25LP
-0.5V to +6.0V
IS25WP
-0.5V to +2.5V
Note:
1. Applied conditions greater than those listed in “Absolute Maximum Ratings” may cause permanent damage to
the device. This is a stress rating only and functional operation of the device at these or any other conditions
above those indicated in the operational sections of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect reliability.
9.2 OPERATING RANGE
Operating Temperature
VCC Power Supply
Extended Grade E
-40°C to 105°C
Extended+ Grade E1
-40°C to 125°C
Automotive Grade A1
-40°C to 85°C
Automotive Grade A2
-40°C to 105°C
Automotive Grade A3
-40°C to 125°C
IS25LP
2.3V (VMIN) – 3.6V (VMAX); 3.3V (Typ)
IS25WP
1.65V (VMIN) –1.95V (VMAX); 1.8V (Typ)
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IS25LP256, IS25WP256
9.3 DC CHARACTERISTICS
(Under operating range)
Symbol
ICC1
Parameter
Condition
VCC Active Read current(3)
Min
Typ
(2)
Max
NORD at 80MHz
4
FRD Single at 166MHz
7
9
FRD Dual at 166MHz
9
11
FRD Quad at 166MHz
11
14
FRD Single at 133MHz
6
8
FRD Dual at 133MHz
8
10
FRD Quad at 133MHz
10
13
9
FRD Quad at 83MHz
8
10
FRD Quad at 104MHz
9
11
FRD Single DDR at 66MHz
6
8
FRD Dual DDR at 66MHz
8
10
FRD Quad DDR at 66MHz
10
13
ICC2
VCC Program Current
CE# = VCC
25
30
ICC3
VCC WRSR Current
CE# = VCC
25
30
ICC4
VCC Erase Current (4K/32K/64K)
CE# = VCC
25
30
ICC5
VCC Erase Current (CE)
CE# = VCC
25
30
VCC Standby Current CMOS
CE# = VCC,
CE#, RESET#(4) = VCC
IS25LP
ISB2
CE# = VCC,
CE#, RESET#(4) = VCC
Deep power down
current
IS25WP
CE# = VCC,
CE#, RESET#(4) = VCC
mA
mA
TBD (6)
85°C
ISB1
Units
105°C
10
TBD (6)
125°C
50
85°C
TBD (6)
105°C
5
TBD (6)
125°C
20
85°C
TBD (6)
105°C
1
125°C
µA
µA
TBD (6)
TBD
ILI
Input Leakage Current
VIN = 0V to VCC
±1(5)
µA
ILO
Output Leakage Current
VIN = 0V to VCC
±1(5)
µA
(1)
Input Low Voltage
-0.5
0.3VCC
V
(1)
VIH
Input High Voltage
0.7VCC
VCC + 0.3
V
VOL
Output Low Voltage
IOL = 100 µA
0.2
V
VOH
Output High Voltage
IOH = -100 µA
VIL
VCC - 0.2
V
Notes:
1. Maximum DC voltage on input or I/O pins is VCC + 0.5V. During voltage transitions, input or I/O pins may
overshoot VCC by +2.0V for a period of time not to exceed 20ns. Minimum DC voltage on input or I/O pins is
-0.5V. During voltage transitions, input or I/O pins may undershoot GND by -2.0V for a period of time not to
exceed 20ns.
2. Typical values are included for reference only and are not guaranteed or tested. Typical values are measured at
VCC = VCC (Typ), TA=25°C.
3. Outputs are unconnected during reading data so that output switching current is not included.
4. Only for the additional RESET# pin.
5. The Max of ILI and ILO for the additional RESET# pin is ±2 µA.
6. These parameters are characterized and are not 100% tested.
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9.4 AC MEASUREMENT CONDITIONS
Symbol
Max
Units
Load Capacitance up to 104MHz/52MHz DTR
30
pF
Load Capacitance up to 166MHz/80MHz DTR
15
pF
TR,TF
Input Rise and Fall Times
5
ns
VIN
Input Pulse Voltages
0.2VCC to 0.8VCC
V
VREFI
Input Timing Reference Voltages
0.3VCC to 0.7VCC
V
VREFO
Output Timing Reference Voltages
0.5VCC
V
CL
Parameter
Min
Figure 9.1 Output test load & AC measurement I/O Waveform
0.8VCC
Input
1.8k
VCC/2
AC
Measurement
Level
0.2VCC
OUTPUT PIN
1.2k
15/30pf
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9.5 AC CHARACTERISTICS
(Under operating range, refer to section 9.4 for AC measurement conditions)
Symbol
fCT
fC2, fT2, fQ2
fC
Min
Clock Frequency for fast read mode: SPI, Dual, Dual I/O,
Quad I/O, and QPI.
Clock Frequency for fast read DTR:
SPI DTR, Dual DTR, Dual I/O DTR, Quad I/O DTR, and
QPI DTR.
Clock Frequency for read mode SPI
Typ
(3)
Max
Units
0
166
MHz
0
80
MHz
0
80
MHz
(1)
SCK Rise Time (peak to peak)
0.1
V/ns
(1)
SCK Fall Time ( peak to peak)
0.1
V/ns
tCLCH
tCHCL
Parameter
For read mode
45% fC
tCKH
SCK High Time
tCKL
SCK Low Time
tCEH
CE# High Time
7
ns
tCS
CE# Setup Time
3
ns
tCH
CE# Hold Time
3
ns
tDS
Data In Setup Time
tDH
Data in Hold Time
tV
Output Valid
tOH
For others
For read mode
For others
Normal Mode
DTR Mode
Normal Mode
DTR Mode
ns
45% fCT/C2/T2/Q2
45% fC
ns
45% fCT/C2/T2/Q2
2
ns
1.5
2
ns
1.5
@ 166MHz (CL = 15pF)
7
@ 133MHz (CL = 15pF)
7
@ 104MHz (CL = 30pF)
8
Output Hold Time
ns
2
ns
(1)
tDIS
Output Disable Time
tHLCH
HOLD Active Setup Time relative to SCK
2
ns
tCHHH
HOLD Active Hold Time relative to SCK
2
ns
tHHCH
HOLD Not Active Setup Time relative to SCK
2
ns
tCHHL
HOLD Not Active Hold Time relative to SCK
2
tLZ
8
ns
ns
(1)
HOLD to Output Low Z
8
ns
(1)
HOLD to Output High Z
8
ns
tHZ
tEC
Sector Erase Time (4Kbyte)
50
300
ms
Block Erase Time (32Kbyte)
0.14
0.75
s
Block Erase time (64Kbyte)
0.2
1.0
s
50
180
s
0.2
0.8
ms
Chip Erase Time
tPP
256Mb
Page Program Time
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Symbol
tRES1
(1)
Parameter
Deep power down
tW
Write Status Register time
(1)
tSRST
(1)
tRESET
(1)
tHWRST
(1)
Typ
Release deep power down
(1)
tDP
tSUS
Min
(3)
Max
Units
15
µs
3
µs
15
ms
Suspend to read ready
100
µs
Software Reset recovery time
100
µs
RESET# pin low pulse width
Hardware Reset recovery time
2
1
(2)
µs
100
µs
Notes:
1. These parameters are characterized and not 100% tested.
2. If the RESET# pulse is driven for a period shorter than 1µs (tRESET minimum), it may still reset the device,
however the 1µs minimum period is recommended to ensure reliable operation.
3. Typical values are included for reference only and are not guaranteed or tested. Typical values are measured at
VCC = VCC (Typ), TA=25°C.
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9.6 SERIAL INPUT/OUTPUT TIMING
Figure 9.2 SERIAL INPUT/OUTPUT TIMING (Normal Mode)
(1)
tCEH
CE#
tCH
tCS
tCKH
SCK
tDS
SI
tCKL
tDH
VALID IN
VALID IN
tOH
tV
SO
HI-Z
tDIS
HI-Z
VALID OUTPUT
Note1: For SPI Mode 0 (0,0)
Figure 9.3 SERIAL INPUT/OUTPUT TIMING (DTR Mode)
(1)
tCEH
CE#
tCH
tCS
tCKH
SCK
tDS
SI
tCKL
tDH
VALID IN
VALID IN
VALID IN
tV
SO
HI-Z
tV
Output
tOH
Output
tDIS
HI-Z
Note1: For SPI Mode 0 (0,0)
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Figure 9.4 HOLD TIMING
CE#
tHLCH
tCHHL
tHHCH
SCK
tCHHH
tHZ
tLZ
SO
SI
HOLD#
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9.7 POWER-UP AND POWER-DOWN
At Power-up and Power-down, the device must be NOT SELECTED until Vcc reaches at the right level. (Adding
a simple pull-up resistor on CE# is recommended.)
Power up timing
VCC
VCC(max)
All Write Commands are Rejected
Chip Selection Not Allowed
VCC(min)
Reset State
tVCE
Read Access Allowed
V(write inhibit)
Device fully
accessible
tPUW
Symbol
Min.
Vcc(min) to CE# Low
1
(1)
Power-up time delay to write instruction
1
tPUW
VWI
Parameter
(1)
tVCE
(1)
Write Inhibit Voltage
Max
Unit
ms
10
IS25LP
2.1
IS25WP
1.3
ms
V
Note: These parameters are characterized and not 100% tested.
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9.8 PROGRAM/ERASE PERFORMANCE
Parameter
Typ
Max
Unit
Sector Erase Time (4Kbyte)
Block Erase Time (32Kbyte)
Block Erase Time (64Kbyte)
45
300
ms
0.15
0.75
s
0.3
1.5
s
Chip Erase Time
Page Programming Time
Byte Program
256Mb
60
180
s
0.2
0.8
ms
8
40
µs
Note: These parameters are characterized and not 100% tested.
9.9 RELIABILITY CHARACTERISTICS
Parameter
Min
Unit
Test Method
Endurance
100,000
Cycles
JEDEC Standard A117
Data Retention
20
Years
JEDEC Standard A103
ESD – Human Body Model
2,000
Volts
JEDEC Standard A114
ESD – Machine Model
200
Volts
JEDEC Standard A115
Latch-Up
100 + ICC1
mA
JEDEC Standard 78
Note: These parameters are characterized and not 100% tested.
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10. PACKAGE TYPE INFORMATION
10.1 8-CONTACT ULTRA-THIN SMALL OUTLINE NO-LEAD (WSON) PACKAGE 8X6MM (L)
SYMBOL
DIMENSION IN MM
MIN.
NOM
MAX
A
0.70
0.75
0.80
A1
0.00
0.02
0.05
A2
---
0.20
---
D
7.90
8.00
8.10
E
5.90
6.00
6.10
D1
4.65
4.70
4.75
E1
4.55
4.60
4.65
e
---
1.27
---
b
0.35
0.40
0.48
L
0.4
0.50
0.60
Note: All dimensions are in millimeters. Lead co-planarity is 0.08mm.
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10.2 16-LEAD PLASTIC SMALL OUTLINE PACKAGE (300 MILS BODY WIDTH) (M)
Millimeters
10.0
10.65
7.4
9
7.6
16
10.1
10.5
0.23
0.32
Detail A
1
8
2.25
2.4
2.35
2.65
Detail A
1.27
0.1
0.33
0.51
0.1
0.3
0.4
1.27
00
80
Note: All dimensions are in millimeters. Lead co-planarity is 0.08mm.
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10.3 24-BALL THIN PROFILE FINE PITCH BGA 6X8MM 4X6 BALL ARRAY (G)
4
D
3
2
1
A1 Corner
Index Area
A
B
E
E1
C
e
D
E
F
(TOP VIEW)
nX Øb
e
D1
(BOTTOM VIEW)
A1 Corner
Index Area
A3
A
A2
A1
SYMBOL
DIMENSIONS (MM)
MIN
NOM
MAX
A
-
-
1.20
A1
0.27
-
0.37
A2
0.21 REF
A3
0.54 REF
D
6 BSC
E
8 BSC
D1
-
3.00
-
E1
-
5.00
-
e
-
1.00
-
b
-
0.40
-
Note: All dimensions are in millimeters. Lead co-planarity is 0.08mm.
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10.4 24- BALL THIN PROFILE FINE PITCH BGA 6X8MM 5X5 BALL ARRAY (H)
5
D
4
3
2
1
A1 Corner
Index Area
A
B
e
E
E1
C
D
E
nX Øb
(TOP VIEW)
e
D1
(BOTTOM VIEW)
A1 Corner
Index Area
A3
A
A2
A1
SYMBOL
DIMENSIONS (MM)
MIN
NOM
MAX
A
-
-
1.20
A1
0.27
-
0.37
A2
0.21 REF
A3
0.54 REF
D
6 BSC
E
8 BSC
D1
-
4.00
-
E1
-
4.00
-
e
-
1.00
-
b
-
0.40
-
Note: All dimensions are in millimeters. Lead co-planarity is 0.08mm.
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11. ORDERING INFORMATION – Valid Part Numbers
IS25LP256
-
J
B
L
E
TEMPERATURE RANGE
E = Extended (-40°C to +105°C)
E1 = Extended+ (-40°C to +125°C)
A1 = Automotive Grade (-40°C to +85°C)
A2 = Automotive Grade (-40°C to +105°C)
A3 = Automotive Grade (-40°C to +125°C)
PACKAGING CONTENT
L = RoHS compliant
PACKAGE Type
L = 8-contact WSON (8x6mm)
M = 16-pin SOIC 300mil
(1)
G = 24-ball TFBGA (6x8mm) 4x6 ball array
(1)
H = 24-ball TFBGA (6x8mm) 4x6 ball array
W = KGD (Call Factory)
Option
J = Standard
R = additional RESET# pin option
Die Revision
Blank = First Revision
Density
256 = 256 Megabit
BASE PART NUMBER
IS = Integrated Silicon Solution Inc.
25LP = FLASH, 2.30V ~ 3.60V, QPI
25WP = FLASH, 1.65V ~ 1.95V, QPI
Note:
1. For the additional RESET# pin option for 24-ball TFBGA 6x8mm packages, call Factory
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Density,
Voltage
256M,
3V
256M,
1.8V
Frequency (MHz)
STR 166,
DTR 80
STR 166,
DTR 80
Order Part Number(1)
Package
IS25LP256-JLLE
IS25LP256-JLLE1
8-contact WSON 8x6mm
IS25LP256-JMLE
IS25LP256-JMLE1
16-pin SOIC 300mil
IS25LP256-JGLE
IS25LP256-JGLE1
24-ball TFBGA 6x8mm 4x6 ball array(3)
IS25LP256-JHLE
IS25LP256-JHLE1
24-ball TFBGA 6x8mm 5x5 ball array(3)
IS25LP256-RMLE
IS25LP256-RMLE1
16-pin SOIC 300mil(2)
IS25LP256-JLLA*
8-contact WSON (8x6mm) (Call Factory)
IS25LP256-JMLA*
16-pin SOIC 300mil (Call Factory)
IS25LP256-JGLA*
24-ball TFBGA 6x8mm 4x6 ball array(3) (Call Factory)
IS25LP256-JHLA*
24-ball TFBGA 6x8mm 5x5 ball array(3) (Call Factory)
IS25LP256-RMLA*
16-pin SOIC 300mil(2) (Call Factory)
IS25LP256-JWLE
KGD (Call Factory)
IS25WP256-JLLE
IS25WP256-JLLE1
8-contact WSON 8x6mm
IS25WP256-JMLE
IS25WP256-JMLE1
16-pin SOIC 300mil
IS25WP256-JGLE
IS25WP256-JGLE1
24-ball TFBGA 6x8mm 4x6 ball array(3)
IS25WP256-JHLE
IS25WP256-JHLE1
24-ball TFBGA 6x8mm 5x5 ball array(3)
IS25WP256-RMLE
IS25WP256-RMLE1
16-pin SOIC 300mil(2)
IS25WP256-JLLA*
8-contact WSON (8x6mm) (Call Factory)
IS25WP256-JMLA*
16-pin SOIC 300mil (Call Factory)
IS25WP256-JGLA*
24-ball TFBGA 6x8mm 4x6 ball array(3) (Call Factory)
IS25WP256-JHLA*
24-ball TFBGA 6x8mm 5x5 ball array(3) (Call Factory)
IS25WP256-RMLA*
16-pin SOIC 300mil(2) (Call Factory)
IS25WP256-JWLE
KGD (Call Factory)
Notes:
1. A*= A1, A2, A3: Meets AEC-Q100 requirements with PPAP, E1= Extended+ non-Auto qualified
Temp Grades: E= -40 to 105°C, E1= -40 to 125°C, A1= -40 to 85°C, A2= -40 to 105°C, A3= -40 to 125°C
2. The dedicated parts have additional RESET# pin on pin3.
3. For the additional RESET# pin option for 24-ball TFBGA 6x8mm packages, call Factory.
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