RENESAS R1EX24512ASAS0A

R1EX24512ASAS0A
Two-wire serial interface
512k EEPROM (64-kword × 8-bit)
REJ03C0325-0100
Rev.1.00
May. 16, 2008
Description
R1EX24xxx series are two-wire serial interface EEPROM (Electrically Erasable and Programmable
ROM). They realize high speed, low power consumption and a high level of reliability by employing
advanced MNOS memory technology and CMOS process and low voltage circuitry technology. They
also have a 128-byte page programming function to make their write operation faster.
Note: Renesas Technology’s serial EEPROM are authorized for using consumer applications such as
cellular phone, camcorders, audio equipment. Therefore, please contact Renesas Technology’s
sales office before using industrial applications such as automotive systems, embedded controllers,
and meters.
Features
•
•
•
•
•
•
•
•
Single supply: 1.8 V to 5.5 V
Two-wire serial interface (I2C serial bus)
Clock frequency: 1 MHz (2.5 V to 5.5 V)/400 kHz (1.8 V to 5.5 V)
Power dissipation:
 Standby: 2 µA (max)
 Active (Read): 1 mA (max)
 Active (Write): 5 mA (max)
Automatic page write: 128-byte/page
Write cycle time: 5 ms
Endurance: 106 Cycles
Data retention: 10 Years
REJ03C0325-0100
Page 1 of 21
Rev.1.00
May. 16, 2008
R1EX24512ASAS0A
• Small size packages: SOP-8pin
Shipping tape and reel
 SOP 8-pin: 2,500 IC/reel
• Temperature range: −40 to +85°C
• Lead free products.
Ordering Information
Type No.
Internal
organization
R1EX24512ASAS0A 512k bit
(65536 × 8-bit)
Operating voltage Frequency
Package
1.8 V to 5.5 V
400 kHz
2.5 V to 5.5 V
1 MHz
150 mil 8-pin plastic SOP
PRSP0008DF-B
(FP-8DBV)
Lead free
Pin Arrangement
8-pin SOP /8-pin TSSOP
A0
1
8
VCC
A1
2
7
WP
A2
3
6
SCL
VSS
4
5
SDA
(Top view)
Pin Description
Pin name
Function
A0 to A1
Device address
SCL
Serial clock input
SDA
Serial data input/output
WP
Write protect
VCC
Power supply
VSS
Ground
NC
No connection
REJ03C0325-0100 Rev.1.00 May. 16, 2008
Page 2 of 21
R1EX24512ASAS0A
Block Diagram
High voltage generator
Control
logic
A0, A1
SCL
X decoder
WP
Address generator
VSS
Memory array
Y decoder
VCC
Y-select & Sense amp.
SDA
Serial-parallel converter
Absolute Maximum Ratings
Parameter
Symbol
Value
Unit
Supply voltage relative to VSS
VCC
−0.6 to +7.0
Input voltage relative to VSS
Vin
−0.5* to +7.0*
V
Operating temperature range*1
Topr
−40 to +85
°C
Storage temperature range
Tstg
−55 to +125
°C
2
V
3
Notes: 1. Including electrical characteristics and data retention.
2. Vin (min): −3.0 V for pulse width ≤ 50 ns.
3. Should not exceed VCC + 1.0 V.
DC Operating Conditions
Parameter
Symbol
Min
Typ
Max
Unit
Supply voltage
VCC
1.8

5.5
V
VSS
0
0
0
V
Input high voltage
VIH
VCC × 0.7

VCC + 0.5
V
Input low voltage
VIL
−0.3*1

VCC × 0.3
V
Operating temperature
Topr
−40

+85
°C
Notes: 1. VIL (min): −1.0 V for pulse width ≤ 50 ns.
REJ03C0325-0100 Rev.1.00 May. 16, 2008
Page 3 of 21
R1EX24512ASAS0A
DC Characteristics (Ta = −40 to +85°C, VCC = 1.8 V to 5.5 V)
Parameter
Symbol Min
Typ
Max
Unit
Test conditions
Input leakage current
ILI


2.0
µA
VCC = 5.5 V, Vin = 0 to 5.5 V
Output leakage current
ILO


2.0
µA
VCC = 5.5 V, Vout = 0 to 5.5 V
Standby VCC current
ISB

1.0
2.0
µA
Vin = VSS or VCC
Read VCC current
ICC1


1.0
mA
VCC = 5.5 V, Read at 400 kHz
Write VCC current
ICC2


5.0
mA
VCC = 5.5 V, Write at 400 kHz
Output low voltage
VOL2


0.4
V
VCC = 2.7 to 5.5 V, IOL = 3.0 mA
VOL1


0.2
V
VCC = 1.8 to 2.7 V, IOL = 1.5 mA
Capacitance (Ta = +25°C, f = 1 MHz)
Parameter
Symbol
Min
Typ
Max
Unit
Test
conditions
Input capacitance (A0 to A1, SCL, WP) Cin*1


6.0
pF
Vin = 0 V
CI/O*1


6.0
pF
Vout = 0 V
Output capacitance (SDA)
Note:
1. This parameter is sampled and not 100% tested.
REJ03C0325-0100 Rev.1.00 May. 16, 2008
Page 4 of 21
R1EX24512ASAS0A
AC Characteristics (Ta = −40 to +85°C, VCC = 1.8 to 5.5 V)
Test Conditions
• Input pules levels:
 VIL = 0.2 × VCC
 VIH = 0.8 × VCC
• Input rise and fall time: ≤ 20 ns
• Input and output timing reference levels: 0.5 × VCC
• Output load: TTL Gate + 100 pF
VCC = 1.8 V to 5.5 V
VCC = 2.5 V to 5.5 V
Parameter
Symbol Min
Clock frequency
fSCL
Clock pulse width low
tLOW
1200


600


ns
Clock pulse width high
tHIGH
600


400


ns
Noise suppression time
tI


50


50
ns
Access time
tAA
100

900
100

550
ns
Bus free time for next
mode
tBUF
1200


500


ns
Start hold time
tHD.STA
600


250


ns
Start setup time
tSU.STA
600


250


ns
Data in hold time
tHD.DAT
0


0


ns
Data in setup time
tSU.DAT
100


100


ns

Typ
Max
Min
Typ
Max
Unit

400


1000
kHz
Notes
1
Input rise time
tR


300


300
ns
1
Input fall time
tF


300


100
ns
1
Stop setup time
tSU.STO
600


250


ns
Data out hold time
tDH
50


50


ns
Write protect hold time
tHD.WP
1200


600


ns
Write protect setup time
tSU.WP
0


0


Ns
Write cycle time
tWC


5


5
ms
2
Erase/Write Endurance





cycles
3
6
10
6
10
Notes: 1. This parameter is sampled and not 100% tested.
2. tWC is the time from a stop condition to the end of internally controlled write cycle.
3. This parameter is sampled and not 100% tested.
6
10 Cycles (Ta = 25°C)
105 Cycles (Ta = 85°C)
REJ03C0325-0100 Rev.1.00 May. 16, 2008
Page 5 of 21
R1EX24512ASAS0A
Timing Waveforms
Bus Timing
tF
tHIGH
1/fSCL
tLOW
tR
SCL
tSU.STA
tHD.DAT
tSU.DAT
tHD.STA
tSU.STO
SDA
(in)
tBUF
tAA
tDH
SDA
(out)
tSU.WP
tHD.WP
WP
Write Cycle Timing
Stop condition
Start condition
SCL
SDA
D0 in
Write data
(Address (n))
ACK
REJ03C0325-0100 Rev.1.00 May. 16, 2008
Page 6 of 21
tWC
(Internally controlled)
R1EX24512ASAS0A
Pin Function
Serial Clock (SCL)
The SCL pin is used to control serial input/output data timing. The SCL input is used to positive edge
clock data into EEPROM device and negative edge clock data out of each device. Maximum clock rate is
1 MHz.
Serial Input/Output Data (SDA)
The SDA pin is bidirectional for serial data transfer. The SDA pin needs to be pulled up by resistor as that
pin is open-drain driven structure. Use proper resistor value for your system by considering VOL, IOL and
the SDA pin capacitance. Except for a start condition and a stop condition which will be discussed later,
the SDA transition needs to be completed during the SCL low period.
Data Validity (SDA data change timing waveform)
SCL
SDA
Data
change
Note:
Data
change
High-to-low and low-to-high change of SDA should be done during the SCL low period.
REJ03C0325-0100 Rev.1.00 May. 16, 2008
Page 7 of 21
R1EX24512ASAS0A
Device Address (A0, A1)
Eight devices can be wired for one common data bus line as maximum. Device address pins are used to
distinguish each device and device address pins should be connected to VCC or VSS. When device address
code provided from SDA pin matches corresponding hard-wired device address pins A0 to A1, that one
device can be activated.
Pin Connections for A0 to A1
Pin connection
Max connect
Memory size number
A1
A0
512k bit
VCC/VSS
VCC/VSS
Note:
4
Note
1. During floating, "VCC/VSS" are fixed to VSS.
Write Protect (WP)
When the Write Protect pin (WP) is high, the write protection feature is enabled and operates as shown in
the following table.
Also, acknowledgment "0" is outputted after inputting device address and memory address. After
inputting write data, acknowledgment "1""(NO ACK) is outputted.
When the WP is low, write operation for all memory arrays are allowed. The read operation is always
activated irrespective of the WP pin status.
Write Protect Area
Write protect area
WP pin status
512k bit
VIH
Full (512k bit)
VIL
Normal read/write operation
REJ03C0325-0100 Rev.1.00 May. 16, 2008
Page 8 of 21
R1EX24512ASAS0A
Functional Description
Start Condition
A high-to-low transition of the SDA with the SCL high is needed in order to start read, write operation
(See start condition and stop condition).
Stop Condition
A low-to-high transition of the SDA with the SCL high is a stop condition. The stand-by operation starts
after a read sequence by a stop condition. In the case of write operation, a stop condition terminates the
write data inputs and place the device in a internally-timed write cycle to the memories. After the
internally-timed write cycle which is specified as tWC, the device enters a standby mode (See write cycle
timing).
Start Condition and Stop Condition
SCL
SDA
(in)
Start condition
REJ03C0325-0100 Rev.1.00 May. 16, 2008
Page 9 of 21
Stop condition
R1EX24512ASAS0A
Acknowledge
All addresses and data words are serially transmitted to and from in 8-bit words. The receiver sends a
zero to acknowledge that it has received each word. This happens during ninth clock cycle. The
transmitter keeps bus open to receive acknowledgment from the receiver at the ninth clock. In the write
operation, EEPROM sends a zero to acknowledge after receiving every 8-bit words. In the read operation,
EEPROM sends a zero to acknowledge after receiving the device address word. After sending read data,
the EEPROM waits acknowledgment by keeping bus open. If the EEPROM receives zero as an
acknowledge, it sends read data of next address. If the EEPROM receives acknowledgment "1" (no
acknowledgment) and a following stop condition, it stops the read operation and enters a stand-by mode.
If the EEPROM receives neither acknowledgment "0" nor a stop condition, the EEPROM keeps bus open
without sending read data.
Acknowledge Timing Waveform
SCL
1
SDA IN
SDA OUT
REJ03C0325-0100 Rev.1.00 May. 16, 2008
Page 10 of 21
2
8
9
Acknowledge
out
R1EX24512ASAS0A
Device Addressing
The EEPROM device requires an 8-bit device address word following a start condition to enable the chip
for a read or a write operation. The device address word consists of 4-bit device code, 3-bit device
address code and 1-bit read/write(R/W) code. The most significant 4-bit of the device address word are
used to distinguish device type and this EEPROM uses “1010” fixed code. The device address word is
followed by the 3-bit device address code. The device address code selects one device out of all devices
which are connected to the bus. This means that the device is selected if the inputted 3-bit device address
code is equal to the corresponding hard-wired A1-A0 pin status. The eighth bit of the device address
word is the read/write(R/W) bit. A write operation is initiated if this bit is low and a read operation is
initiated if this bit is high. Upon a compare of the device address word, the EEPROM enters the read or
write operation after outputting the zero as an acknowledge. The EEPROM turns to a stand-by state if the
device code is not “1010” or device address code doesn’t coincide with status of the correspond hard-wired
device address pins A0 to A1.
Device Address Word
Device address word (8-bit)
Device code (fixed)
512k
1
0
R/W code*1
Device address code
1
0
Notes: 1. R/W=“1” is read and R/W = “0” is write.
2. Don’t care bit
REJ03C0325-0100 Rev.1.00 May. 16, 2008
Page 11 of 21
0*2
A1
A0
R/W
R1EX24512ASAS0A
Write Operations(WP=Low)
Byte Write: (Write operation during WP=Low status)
A write operation requires an 8-bit device address word with R/W = “0”. Then the EEPROM sends
acknowledgment "0" at the ninth clock cycle. After these, the EEPROMs receive 2 sequence 8-bit memory
address words. Upon receipt of this memory address, the EEPROM outputs acknowledgment "0" and
receives a following 8-bit write data. After receipt of write data, the EEPROM outputs acknowledgment
"0". If the EEPROM receives a stop condition, the EEPROM enters an internally-timed write cycle and
terminates receipt of SCL, SDA inputs until completion of the write cycle. The EEPROM returns to a
standby mode after completion of the write cycle.
Byte Write Operation
1 0 1 00
Start
W
2nd Memory
address (n)
Write data (n)
D7
D6
D5
D4
D3
D2
D1
D0
512k
1st Memory
address (n)
a7
a6
a5
a4
a3
a2
a1
a0
*1
Device
address
a15
a14
a13
a12
a11
a10
a9
a8
WP
ACK
R/W
Note: 1. Don't care bit
REJ03C0325-0100 Rev.1.00 May. 16, 2008
Page 12 of 21
ACK
ACK
ACK
Stop
R1EX24512ASAS0A
Page Write:
The EEPROM is capable of the page write operation which allows any number of bytes up to 128 bytes to
be written in a single write cycle. The page write is the same sequence as the byte write except for
inputting the more write data. The page write is initiated by a start condition, device address word,
memory address(n) and write data (Dn) with every ninth bit acknowledgment. The EEPROM enters the
page write operation if the EEPROM receives more write data (Dn+1) instead of receiving a stop
condition. The a0 to a6 address bits are automatically incremented upon receiving write data (Dn+1).
The EEPROM can continue to receive write data up to 128 bytes. If the a0 to a6 address bits reaches the
last address of the page, the a0 to a6 address bits will roll over to the first address of the same page and
previous write data will be overwritten. Upon receiving a stop condition, the EEPROM stops receiving
write data and enters internally-timed write cycle.
Page Write Operation
1 0 1 00
Start
W
2nd Memory
address (n)
Write data (n)
D7
D6
D5
D4
D3
D2
D1
D0
512k
1st Memory
address (n)
a7
a6
a5
a4
a3
a2
a1
a0
*1
Device
address
a15
a14
a13
a12
a11
a10
a9
a8
WP
ACK
R/W
Note: 1. Don't care bit
REJ03C0325-0100 Rev.1.00 May. 16, 2008
Page 13 of 21
ACK
ACK
ACK
Stop
R1EX24512ASAS0A
Write Operations(WP=High)
Byte Write: (Write operation during WP=High status)
A write operation requires an 8-bit device address word with R/W = “0”. Then the EEPROM sends
acknowledgment "0" at the ninth clock cycle. After these, the 32kbit EEPROM receives 2 sequence 8-bit
memory address words.
Upon receipt of this memory address, the EEPROM outputs acknowledgment "0". After receipt of 8-bit
write data, the EEPROM outputs acknowledgment "1"(NO ACK). Then the EEPROM write operations
are not allowed.
Byte Write Operation
1st Memory
address (n)
2nd Memory
address (n)
Write data (n)
a7
a6
a5
a4
a3
a2
a1
a0
D7
D6
D5
D4
D3
D2
D1
D0
No ACK
*1
Device
address
a15
a14
a13
a12
a11
a10
a9
a8
WP
512k
1 0 1 00
Start
W
ACK
R/W
Note: 1. Don't care bit
REJ03C0325-0100 Rev.1.00 May. 16, 2008
Page 14 of 21
ACK
ACK
Stop
R1EX24512ASAS0A
Page Write:
The page write is the same sequence as the byte write. The page write is initiated by a start condition,
device address word and memory address(n) with every ninth bit acknowledgment"0". But after inputting
write data(Dn) , the EEPROM outputs acknowledgment "1"(NO ACK). Then the EEPROM write
operations are not allowed.
Page Write Operation
WP
1st Memory
address (n)
2nd Memory
address (n)
Write data (n)
No ACK
No ACK
Write data (n+m)
Start
ACK
R/W
Note: 1. Don't care bit
REJ03C0325-0100 Rev.1.00 May. 16, 2008
Page 15 of 21
ACK
ACK
D5
D4
D3
D2
D1
D0
W
D7
D6
D5
D4
D3
D2
D1
D0
10 100
a7
a6
a5
a4
a3
a2
a1
a0
512k
a15
a14
a13
a12
a11
a10
a9
a8
*1
Device
address
Stop
R1EX24512ASAS0A
Acknowledge Polling:
Acknowledge polling feature is used to show if the EEPROM is in a internally-timed write cycle or not.
This feature is initiated by the stop condition after inputting write data. This requires the 8-bit device
address word following the start condition during a internally-timed write cycle. Acknowledge polling
will operate when the R/W code = “0”. Acknowledgment “1” (no acknowledgment) shows the EEPROM
is in a internally-timed write cycle and acknowledgment “0” shows that the internally-timed write cycle has
completed. See Write Cycle Polling using ACK.
Write Cycle Polling Using ACK
Send
write command
Send
stop condition
to initiate write cycle
Send
start condition
Send
device address word
with R/W = 0
ACK
returned
No
Yes
Next operation is
addressing the memory
No
Yes
Proceed write operation
Send
memory address
Send
start condition
Proceed random address
read operation
Send
stop condition
REJ03C0325-0100 Rev.1.00 May. 16, 2008
Page 16 of 21
Send
stop condition
R1EX24512ASAS0A
Read Operation
There are three read operations: current address read, random read, and sequential read. Read operations
are initiated the same way as write operations with the exception of R/W = “1”.
Current Address Read:
The internal address counter maintains the last address accessed during the last read or write operation,
with incremented by one. Current address read accesses the address kept by the internal address counter.
After receiving a start condition and the device address word (R/W is “1”), the EEPROM outputs the 8-bit
current address data from the most significant bit following acknowledgment “0”. If the EEPROM
receives acknowledgment “1” (no acknowledgment) and a following stop condition, the EEPROM stops
the read operation and is turned to a standby state. In case the EEPROM has accessed the last address of
the last page at previous read operation, the current address will roll over and returns to zero address. In
case the EEPROM has accessed the last address of the page at previous write operation, the current address
will roll over within page addressing and returns to the first address in the same page. The current address
is valid while power is on. The current address after power on will be indefinite. The random read
operation described below is necessary to define the memory address.
Current Address Read Operation
Device
address
1 0 1 00
R
Start
Note: 1. Don't care bit
REJ03C0325-0100 Rev.1.00 May. 16, 2008
Page 17 of 21
D7
D6
D5
D4
D3
D2
D1
D0
Read data (n+1)
*1
512k
ACK
R/W
No ACK
Stop
R1EX24512ASAS0A
Random Read:
This is a read operation with defined read address. A random read requires a dummy write to set read
address. The EEPROM receives a start condition, device address word (R/W=0) and memory address 2 ×
8-bit sequentially. The EEPROM outputs acknowledgment “0” after receiving memory address then
enters a current address read with receiving a start condition. The EEPROM outputs the read data of the
address which was defined in the dummy write operation. After receiving acknowledgment “1”(no
acknowledgment) and a following stop condition, the EEPROM stops the random read operation and
returns to a standby state.
Random Read Operation
Start
W
ACK
R/W
Device
address
*2
ACK
1 0 1 00
Start
ACK
Dummy write
Notes: 1. 2nd device address code (#) should be same as 1st (@).
2. Don't care bit
REJ03C0325-0100 Rev.1.00 May. 16, 2008
Page 18 of 21
Read data (n)
# #
R
R/W
ACK
D7
D6
D5
D4
D3
D2
D1
D0
1 0 1 00
2nd Memory
address (n)
a7
a6
a5
a4
a3
a2
a1
a0
@@
*2
512k
1st Memory
address (n)
a15
a14
a13
a12
a11
a10
a9
a8
Device
address
No ACK
Stop
Currect address read
R1EX24512ASAS0A
Sequential Read:
Sequential reads are initiated by either a current address read or a random read. If the EEPROM receives
acknowledgment “0” after 8-bit read data, the read address is incremented and the next 8-bit read data are
coming out. This operation can be continued as long as the EEPROM receives acknowledgment “0”.
The address will roll over and returns address zero if it reaches the last address of the last page. The
sequential read can be continued after roll over. The sequential read is terminated if the EEPROM
receives acknowledgment “1” (no acknowledgment) and a following stop condition.
Sequential Read Operation
Device
address
Read data (n+1) Read data (n+2) Read data (n+m)
Start
ACK
R/W
Note: 1. Don't care bit
REJ03C0325-0100 Rev.1.00 May. 16, 2008
Page 19 of 21
ACK
ACK
ACK
D5
D4
D3
D2
D1
D0
R
D7
D6
D5
D4
D3
D2
D1
D0
10 100
D7
D6
D5
D4
D3
D2
D1
D0
512k
D7
D6
D5
D4
D3
D2
D1
D0
*1
Read data (n)
No ACK
Stop
R1EX24512ASAS0A
Notes
Data Protection at VCC On/Off
When VCC is turned on or off, noise on the SCL and SDA inputs generated by external circuits (CPU, etc)
may act as a trigger and turn the EEPROM to unintentional program mode. To prevent this unintentional
programming, this EEPROM has a power on reset function. Be careful of the notices described below in
order for the power on reset function to operate correctly.
• SCL and SDA should be fixed to VCC or VSS during VCC on/off. Low to high or high to low transition
during VCC on/off may cause the trigger for the unintentional programming.
• VCC should be turned off after the EEPROM is placed in a standby state.
• VCC should be turned on from the ground level(VSS) in order for the EEPROM not to enter the
unintentional programming mode.
• VCC turn on speed should be longer than 10 µs.
Noise Suppression Time
This EEPROM have a noise suppression function at SCL and SDA inputs, that cut noise of width less than
50 ns. Be careful not to allow noise of width more than 50 ns.
REJ03C0325-0100 Rev.1.00 May. 16, 2008
Page 20 of 21
R1EX24512ASAS0A
Package Dimensions
R1EX24512ASAS0A (PRSP0008DF-B / Previous Code: FP-8DBV)
JEITA Package Code
P-SOP8-3.9x4.89-1.27
RENESAS Code
PRSP0008DF-B
*1
Previous Code
FP-8DBV
MASS[Typ.]
0.08g
D
8
F
NOTE)
1. DIMENSIONS"*1 (Nom)"AND"*2"
DO NOT INCLUDE MOLD FLASH.
2. DIMENSION"*3"DOES NOT
INCLUDE TRIM OFFSET.
5
*2
c
E
HE
bp
Index mark
Terminal cross section
( Ni/Pd/Au plating )
1
Z
Reference Dimension in Millimeters
Symbol
4
e
*3
bp
x
M
A
L1
A1
θ
L
y
Detail F
REJ03C0325-0100 Rev.1.00 May. 16, 2008
Page 21 of 21
D
E
A2
A1
A
bp
b1
c
c1
θ
HE
e
x
y
Z
L
L1
Min Nom Max
4.89 5.15
3.90
0.102 0.14 0.254
1.73
0.35 0.40 0.45
0.15 0.20 0.25
0°
8°
5.84 6.02 6.20
1.27
0.25
0.10
0.69
0.406 0.60 0.889
1.06
Revision History
Rev.
Date
Contents of Modification
Page
Description
0.01
Jan. 10, 2008

Initial issue
0.02
May. 16, 2008

Dlete R1EX24512ATBS0A
R1EX24512ASAS0A Data Sheet
Sales Strategic Planning Div.
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Notes:
1. This document is provided for reference purposes only so that Renesas customers may select the appropriate Renesas products for their use. Renesas neither makes
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but not limited to, product data, diagrams, charts, programs, algorithms, and application circuit examples.
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destruction or for the purpose of any other military use. When exporting the products or technology described herein, you should follow the applicable export control laws
and regulations, and procedures required by such laws and regulations.
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document is issued. Such information, however, is subject to change without any prior notice. Before purchasing or using any Renesas products listed in this document,
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RENESAS SALES OFFICES
Refer to "http://www.renesas.com/en/network" for the latest and detailed information.
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© 2008. Renesas Technology Corp., All rights reserved. Printed in Japan.
Colophon .7.2