FM24V10
1-Mbit (128 K × 8) Serial (I2C) F-RAM
1-Mbit (128 K × 8) Serial (I2C) F-RAM
Features
Functional Description
■
1-Mbit ferroelectric random access memory (F-RAM) logically
organized as 128 K × 8
14
❐ High-endurance 100 trillion (10 ) read/writes
❐ 151-year data retention (See the Data Retention and
Endurance table)
❐ NoDelay™ writes
❐ Advanced high-reliability ferroelectric process
The FM24V10 is a 1-Mbit nonvolatile memory employing an
advanced ferroelectric process. A ferroelectric random access
memory or F-RAM is nonvolatile and performs reads and writes
similar to a RAM. It provides reliable data retention for 151 years
while eliminating the complexities, overhead, and system-level
reliability problems caused by EEPROM and other nonvolatile
memories.
■
Fast 2-wire Serial interface (I2C)
❐ Up to 3.4-MHz frequency
2
❐ Direct hardware replacement for serial (I C) EEPROM
❐ Supports legacy timings for 100 kHz and 400 kHz
■
Device ID and Serial Number
❐ Manufacturer ID and Product ID
❐ Unique Serial Number (FM24VN10)
■
Low power consumption
❐ 175 A active current at 100 kHz
❐ 90 A (typ) standby current
❐ 5 A (typ) sleep mode current
Unlike EEPROM, the FM24V10 performs write operations at bus
speed. No write delays are incurred. Data is written to the
memory array immediately after each byte is successfully
transferred to the device. The next bus cycle can commence
without the need for data polling. In addition, the product offers
substantial write endurance compared with other nonvolatile
memories. Also, F-RAM exhibits much lower power during writes
than EEPROM since write operations do not require an internally
elevated power supply voltage for write circuits. The FM24V10 is
capable of supporting 1014 read/write cycles, or 100 million times
more write cycles than EEPROM.
■
Low-voltage operation: VDD = 2.0 V to 3.6 V
■
Industrial temperature: –40 C to +85 C
■
8-pin small outline integrated circuit (SOIC) package
■
Restriction of hazardous substances (RoHS) compliant
These capabilities make the FM24V10 ideal for nonvolatile
memory applications, requiring frequent or rapid writes.
Examples range from data logging, where the number of write
cycles may be critical, to demanding industrial controls where the
long write time of EEPROM can cause data loss. The
combination of features allows more frequent data writing with
less overhead for the system.
The FM24V10 provides substantial benefits to users of serial
(I2C) EEPROM as a hardware drop-in replacement. The
FM24VN10 is offered with a unique serial number that is
read-only and can be used to identify a board or system. Both
devices incorporate a read-only Device ID that allows the host to
determine the manufacturer, product density, and product
revision. The device specifications are guaranteed over an
industrial temperature range of –40 C to +85 C.
For a complete list of related documentation, click here.
Logic Block Diagram
Address
Latch
Counter
128 K x 8
F-RAM Array
17
8
SDA
Serial to Parallel
Converter
Data Latch
8
8
SCL
WP
Device ID and
Serial Number
Control Logic
A2-A1
Errata: STOP condition is optional for sleep mode entry. For more information, see Errata on page 19. Details include errata trigger conditions, scope of impact, available
workarounds, and silicon revision applicability.
Cypress Semiconductor Corporation
Document Number: 001-84463 Rev. *G
•
198 Champion Court
•
San Jose, CA 95134-1709
•
408-943-2600
Revised August 6, 2015
FM24V10
Contents
Pinout ................................................................................ 3
Pin Definitions .................................................................. 3
Functional Overview ........................................................ 4
Memory Architecture ........................................................ 4
I2C Interface ...................................................................... 4
STOP Condition (P) ..................................................... 4
START Condition (S) ................................................... 4
Data/Address Transfer ................................................ 5
Acknowledge / No-acknowledge ................................. 5
Slave Device Address ................................................. 6
High Speed Mode (Hs-mode) ...................................... 6
Addressing Overview .................................................. 6
Data Transfer .............................................................. 6
Memory Operation ............................................................ 6
Write Operation ........................................................... 6
Read Operation ........................................................... 7
Sleep Mode ................................................................. 9
Device ID ........................................................................... 9
Unique Serial Number (FM24VN10 only) ...................... 10
Function to Calculate CRC ........................................ 11
Maximum Ratings ........................................................... 12
Operating Range ............................................................. 12
DC Electrical Characteristics ........................................ 12
Data Retention and Endurance ..................................... 13
Document Number: 001-84463 Rev. *G
Capacitance .................................................................... 13
Thermal Resistance ........................................................ 13
AC Test Loads and Waveforms ..................................... 13
AC Test Conditions ........................................................ 13
AC Switching Characteristics ....................................... 14
Power Cycle Timing ....................................................... 15
Ordering Information ...................................................... 16
Ordering Code Definitions ......................................... 16
Package Diagram ............................................................ 17
Acronyms ........................................................................ 18
Document Conventions ................................................. 18
Units of Measure ....................................................... 18
Errata ............................................................................... 19
Part Numbers Affected .............................................. 19
FM24V10/FM24VN10 I2C F-RAM
Qualification Status ........................................................... 19
FM24V10/FM25VN10 Errata Summary .................... 19
Document History Page ................................................. 21
Sales, Solutions, and Legal Information ...................... 22
Worldwide Sales and Design Support ....................... 22
Products .................................................................... 22
PSoC® Solutions ...................................................... 22
Cypress Developer Community ................................. 22
Technical Support ..................................................... 22
Page 2 of 22
FM24V10
Pinout
Figure 1. 8-pin SOIC pinout
NC
1
A1
2
A2
3
VSS
4
Top View
not to scale
8
VDD
7
WP
6
SCL
5
SDA
Pin Definitions
Pin Name
I/O Type
Description
A2-A1
Input
Device Select Address 2-1. These pins are used to select one of up to 4 devices of the same type on
the same I2C bus. To select the device, the address value on the three pins must match the corresponding bits contained in the slave address. The address pins are pulled down internally.
SDA
Input/Output Serial Data/Address. This is a bi-directional pin for the I2C interface. It is open-drain and is intended
to be wire-AND'd with other devices on the I2C bus. The input buffer incorporates a Schmitt trigger for
noise immunity and the output driver includes slope control for falling edges. An external pull-up resistor
is required.
SCL
Input
Serial Clock. The serial clock pin for the I2C interface. Data is clocked out of the device on the falling
edge, and into the device on the rising edge. The SCL input also incorporates a Schmitt trigger input
for noise immunity.
WP
Input
Write Protect. When tied to VDD, addresses in the entire memory map will be write-protected. When
WP is connected to ground, all addresses are write enabled. This pin is pulled down internally.
VSS
Power supply Ground for the device. Must be connected to the ground of the system.
VDD
Power supply Power supply input to the device.
Document Number: 001-84463 Rev. *G
Page 3 of 22
FM24V10
Functional Overview
ready condition because writes occur at bus speed. By the time
a new bus transaction can be shifted into the device, a write
operation is complete. This is explained in more detail in the
interface section.
The FM24V10 is a serial F-RAM memory. The memory array is
logically organized as 131,072 × 8 bits and is accessed using an
industry-standard I2C interface. The functional operation of the
F-RAM is similar to serial (I2C) EEPROM. The major difference
between the FM24V10 and a serial (I2C) EEPROM with the
same pinout is the F-RAM's superior write performance, high
endurance, and low power consumption.
I2C Interface
The FM24V10 employs a bi-directional I2C bus protocol using
few pins or board space. Figure 2 illustrates a typical system
configuration using the FM24V10 in a microcontroller-based
system. The industry standard I2C bus is familiar to many users
but is described in this section.
Memory Architecture
When accessing the FM24V10, the user addresses 128K
locations of eight data bits each. These eight data bits are shifted
in or out serially. The addresses are accessed using the I2C
protocol, which includes a slave address (to distinguish other
non-memory devices), a page select bit, and a two-byte address.
The 17-bit address consists of a page select bit followed by
16-bits. The complete address of 17-bits specifies each byte
address uniquely.
By convention, any device that is sending data onto the bus is
the transmitter while the target device for this data is the receiver.
The device that is controlling the bus is the master. The master
is responsible for generating the clock signal for all operations.
Any device on the bus that is being controlled is a slave. The
FM24V10 is always a slave device.
The bus protocol is controlled by transition states in the SDA and
SCL signals. There are four conditions including START, STOP,
data bit, or acknowledge. Figure 3 and Figure 4 illustrates the
signal conditions that specify the four states. Detailed timing
diagrams are shown in the electrical specifications section.
The access time for the memory operation is essentially zero,
beyond the time needed for the serial protocol. That is, the
memory is read or written at the speed of the I2C bus. Unlike a
serial (I2C) EEPROM, it is not necessary to poll the device for a
Figure 2. System Configuration using Serial (I2C) nvSRAM
Vcc
RPmin = (VDD - VOLmax) / IOL
RPmax = tr / (0.8473 * Cb)
SDA
Microcontroller
SCL
Vcc
Vcc
A1
SCL
A1
SCL
A1
SCL
A2
SDA
A2
SDA
A2
SDA
WP
#0
WP
#1
WP
#3
STOP Condition (P)
START Condition (S)
A STOP condition is indicated when the bus master drives SDA
from LOW to HIGH while the SCL signal is HIGH. All operations
using the FM24V10 should end with a STOP condition. If an
operation is in progress when a STOP is asserted, the operation
will be aborted. The master must have control of SDA in order to
assert a STOP condition.
A START condition is indicated when the bus master drives SDA
from HIGH to LOW while the SCL signal is HIGH. All commands
should be preceded by a START condition. An operation in
progress can be aborted by asserting a START condition at any
time. Aborting an operation using the START condition will ready
the FM24V10 for a new operation.
If during operation the power supply drops below the specified
VDD minimum, the system should issue a START condition prior
to performing another operation.
Document Number: 001-84463 Rev. *G
Page 4 of 22
FM24V10
Figure 3. START and STOP Conditions
full pagewidth
SDA
SDA
SCL
SCL
S
P
STOP Condition
START Condition
Figure 4. Data Transfer on the I2C Bus
handbook, full pagewidth
P
SDA
Acknowledgement
signal from slave
MSB
SCL
S
1
2
7
9
8
1
Acknowledgement
signal from receiver
2
3
4-8
ACK
START
condition
9
ACK
All data transfers (including addresses) take place while the SCL
signal is HIGH. Except under the three conditions described
above, the SDA signal should not change while SCL is HIGH.
Acknowledge / No-acknowledge
The acknowledge takes place after the 8th data bit has been
transferred in any transaction. During this state the transmitter
should release the SDA bus to allow the receiver to drive it. The
receiver drives the SDA signal LOW to acknowledge receipt of
the byte. If the receiver does not drive SDA LOW, the condition
is a no-acknowledge and the operation is aborted.
S
or
P
STOP or
START
condition
Byte complete
Data/Address Transfer
S
The receiver would fail to acknowledge for two distinct reasons.
First is that a byte transfer fails. In this case, the no-acknowledge
ceases the current operation so that the device can be
addressed again. This allows the last byte to be recovered in the
event of a communication error.
Second and most common, the receiver does not acknowledge
to deliberately end an operation. For example, during a read
operation, the FM24V10 will continue to place data onto the bus
as long as the receiver sends acknowledges (and clocks). When
a read operation is complete and no more data is needed, the
receiver must not acknowledge the last byte. If the receiver
acknowledges the last byte, this will cause the FM24V10 to
attempt to drive the bus on the next clock while the master is
sending a new command such as STOP.
Figure 5. Acknowledge on the I2C Bus
handbook, full pagewidth
DATA OUTPUT
BY MASTER
No Acknowledge
DATA OUTPUT
BY SLAVE
Acknowledge
SCL FROM
MASTER
1
2
8
9
S
START
Condition
Document Number: 001-84463 Rev. *G
Clock pulse for
acknowledgement
Page 5 of 22
FM24V10
Slave Device Address
Figure 6. Memory Slave Device Address
The first byte that the FM24V10 expects after a START condition
is the slave address. As shown in Figure 6, the slave address
contains the device type or slave ID, the device select address
bits, a page select bit, and a bit that specifies if the transaction is
a read or a write.
Bits 7-4 are the device type (slave ID) and should be set to 1010b
for the FM24V10. These bits allow other function types to reside
on the I2C bus within an identical address range. Bits 3-2 are the
device select address bits. They must match the corresponding
value on the external address pins to select the device. Up to four
FM24V10 devices can reside on the same I2C bus by assigning
a different address to each. Bit 1 is the page select bit and is
effectively the address MSB, A16. It specifies the 64K-byte block
of memory that is targeted for the current operation. Bit 0 is the
read/write bit (R/W). R/W = ‘1’ indicates a read operation and
R/W = ‘0’ indicates a write operation.
MSB
handbook, halfpage
1
LSB
0
1
0
A2
A1
Device
Select
Slave ID
A16 R/W
Page
select
High Speed Mode (Hs-mode)
The FM24V10 supports a 3.4-MHz high speed mode. A master
code (00001XXXb) must be issued to place the device into high
speed mode. Communication between master and slave will
then be enabled for speeds up to 3.4-MHz. A STOP condition will
exit Hs-mode. Single- and multiple-byte reads and writes are
supported.
Figure 7. Data transfer format in Hs-mode
handbook, full pagewidth
Hs-mode
F/S-mode
S
MASTER CODE
1 S
SLAVE ADD. R/W 0
F/S-mode
DATA
A /1 P
n (bytes+ ack.)
No Acknowledge
Addressing Overview
After the FM24V10 (as receiver) acknowledges the slave
address, the master can place the memory address on the bus
for a write operation. The address requires a 1-bit page select
and two bytes. Since the device uses 17-bit address, the page
select bit is the MSB of the address followed by the remaining
16-bit address. The complete 17-bit address is latched internally.
Each access causes the latched address value to be incremented automatically. The current address is the value that is
held in the latch; either a newly written value or the address
following the last access. The current address will be held for as
long as power remains or until a new value is written. Reads
always use the current address. A random read address can be
loaded by beginning a write operation as explained below.
After transmission of each data byte, just prior to the
acknowledge, the FM24V10 increments the internal address
latch. This allows the next sequential byte to be accessed with
no additional addressing. After the last address (1FFFFh) is
reached, the address latch will roll over to 00000h. There is no
limit to the number of bytes that can be accessed with a single
read or write operation.
Data Transfer
After the address bytes have been transmitted, data transfer
between the bus master and the FM24V10 can begin. For a read
operation the FM24V10 will place 8 data bits on the bus then wait
for an acknowledge from the master. If the acknowledge occurs,
the FM24V10 will transfer the next sequential byte. If the
acknowledge is not sent, the FM24V10 will end the read
operation. For a write operation, the FM24V10 will accept 8 data
Document Number: 001-84463 Rev. *G
Acknowledge or
No Acknowledge
Hs-mode continues
S
SLAVE ADD.
bits from the master then send an acknowledge. All data transfer
occurs MSB (most significant bit) first.
Memory Operation
The FM24V10 is designed to operate in a manner very similar to
other I2C interface memory products. The major differences
result from the higher performance write capability of F-RAM
technology. These improvements result in some differences
between the FM24V10 and a similar configuration EEPROM
during writes. The complete operation for both writes and reads
is explained below.
Write Operation
All writes begin with a slave address, then a memory address.
The bus master indicates a write operation by setting the LSB of
the slave address (R/W bit) to a '0'. After addressing, the bus
master sends each byte of data to the memory and the memory
generates an acknowledge condition. Any number of sequential
bytes may be written. If the end of the address range is reached
internally, the address counter will wrap from 1FFFFh to 00000h.
Unlike other nonvolatile memory technologies, there is no
effective write delay with F-RAM. Since the read and write
access times of the underlying memory are the same, the user
experiences no delay through the bus. The entire memory cycle
occurs in less time than a single bus clock. Therefore, any
operation including read or write can occur immediately following
a write. Acknowledge polling, a technique used with EEPROMs
to determine if a write is complete is unnecessary and will always
return a ready condition.
Page 6 of 22
FM24V10
all addresses. The FM24V10 will not acknowledge data bytes
that are written to protected addresses. In addition, the address
counter will not increment if writes are attempted to these
addresses. Setting WP to a LOW state (VSS) will disable the write
protect. WP is pulled down internally.
Internally, an actual memory write occurs after the 8th data bit is
transferred. It will be complete before the acknowledge is sent.
Therefore, if the user desires to abort a write without altering the
memory contents, this should be done using START or STOP
condition prior to the 8th data bit. The FM24V10 uses no page
buffering.
Figure 8 and Figure 9 below illustrate a single-byte and
multiple-byte write cycles in F/S mode. Figure 10 below illustrate
a single-byte write cycles in Hs mode.
The memory array can be write-protected using the WP pin.
Setting the WP pin to a HIGH condition (VDD) will write-protect
Figure 8. Single-Byte Write
Start
By Master
S
Stop
Address & Data
Slave Address
P
0
S
A
Address MSB
A
Address LSB
A
Data Byte
A
P
By F-RAM
Acknowledge
Figure 9. Multi-Byte Write
Start
Stop
Address & Data
By Master
S
Slave Address
P
0
S
A
Address MSB
A
Address LSB
A
Data Byte
A
Data Byte
A
P
By F-RAM
Acknowledge
Figure 10. Hs-mode Byte Write
Start
Start &
Enter HS-mode
HS-mode command
By Master
S
0
0
0
0
1
X
By F-RAM
X
X
1
S
Slave Address
No
Acknowledge
Read Operation
There are two basic types of read operations. They are current
address read and selective address read. In a current address
read, the FM24V10 uses the internal address latch to supply the
address. In a selective read, the user performs a procedure to
set the address to a specific value.
Current Address & Sequential Read
As mentioned above the FM24V10 uses an internal latch to
supply the address for a read operation. A current address read
uses the existing value in the address latch as a starting place
for the read operation. The system reads from the address
immediately following that of the last operation.
Document Number: 001-84463 Rev. *G
Stop &
Exit HS-mode
Address & Data
P
0 A
S
Address MSB
A
Address LSB
A
Data Byte
A P
Acknowledge
To perform a current address read, the bus master supplies a
slave address with the LSB set to a '1'. This indicates that a read
operation is requested. After receiving the complete slave
address, the FM24V10 will begin shifting out data from the
current address on the next clock. The current address is the
value held in the internal address latch.
Beginning with the current address, the bus master can read any
number of bytes. Thus, a sequential read is simply a current
address read with multiple byte transfers. After each byte the
internal address counter will be incremented.
Note Each time the bus master acknowledges a byte, this
indicates that the FM24V10 should read out the next sequential
byte.
Page 7 of 22
FM24V10
2. The bus master issues a no-acknowledge in the 9th clock
cycle and a START in the 10th.
3. The bus master issues a STOP in the 9th clock cycle.
4. The bus master issues a START in the 9th clock cycle.
There are four ways to properly terminate a read operation.
Failing to properly terminate the read will most likely create a bus
contention as the FM24V10 attempts to read out additional data
onto the bus. The four valid methods are:
1. The bus master issues a no-acknowledge in the 9th clock
cycle and a STOP in the 10th clock cycle. This is illustrated in
the diagrams below. This is preferred.
If the internal address reaches 1FFFFh, it will wrap around to
00000h on the next read cycle. Figure 11 and Figure 12 below
show the proper operation for current address reads.
Figure 11. Current Address Read
Start
By Master
No
Acknowledge
Address
Stop
S
Slave Address X 1 A
By F-RAM
Data Byte
Acknowledge
1
P
Data
Figure 12. Sequential Read
Start
By Master
No
Acknowledge
Acknowledge
Address
Stop
S
X 1 A
Slave Address
By F-RAM
Data Byte
Acknowledge
A
Data Byte
1 P
Data
Figure 13. Hs-mode Current Address Read
Start
By Master
S
0
0
0
0
By F-RAM
Document Number: 001-84463 Rev. *G
1
X
No
Acknowledge
Start &
Enter HS-mode Address
HS-mode command
X
X
1
S
No
Acknowledge
Stop &
Exit HS-mode
Slave Address X 1 A
Acknowledge
Data Byte
1
P
Data
Page 8 of 22
FM24V10
Selective (Random) Read
There is a simple technique that allows a user to select a random
address location as the starting point for a read operation. This
involves using the first three bytes of a write operation to set the
internal address followed by subsequent read operations.
To perform a selective read, the bus master sends out the slave
address with the LSB (R/W) set to 0. This specifies a write
operation. According to the write protocol, the bus master then
sends the address bytes that are loaded into the internal address
latch. After the FM24V10 acknowledges the address, the bus
master issues a START condition. This simultaneously aborts
the write operation and allows the read command to be issued
with the slave address LSB set to a '1'. The operation is now a
current address read.
Figure 14. Selective (Random) Read
Start
Address
By Master
Start
No
Acknowledge
Address
Stop
S
Slave Address
P
0
S
A
Address MSB
A
Address LSB
A
S
Slave Address X 1 A
By F-RAM
A low power mode called Sleep Mode is implemented on the
FM24V10 device. The device will enter this low power state when
the Sleep command 86h is clocked-in. Sleep Mode entry can be
entered as follows:
1. The master sends a START command.
2. The master sends Reserved Slave ID F8h.
3. The FM24V10 sends an ACK.
4. The master sends the I2C-bus slave address of the slave
device it needs to identify. The last bit is a 'Don't care' value
(page select and R/W bits). Only one device must
acknowledge this byte (the one that has the I2C-bus slave
address).
5. The FM24V10 sends an ACK.
6. The master sends a Re-START command.
1 P
Data
Acknowledge
Sleep Mode
Data Byte
7. The master sends Reserved Slave ID 86h.
8. The FM24V10 sends an ACK.
9. The master sends STOP to ensure the device enters sleep
mode.
Note Errata: Step 9 - Sending STOP is an optional step for
FM24V10. The FM24V10 starts entering the Sleep mode from
step 8 and releases the SDA line when in the Sleep mode. The
LOW to HIGH transition on the SDA line when I2C clock is HIGH
generates an unintended STOP. For more information, see
Errata on page 19.
Once in sleep mode, the device draws IZZ current, but the device
continues to monitor the I2C pins. Once the master sends a
Slave Address that the FM24V10 identifies, it will “wakeup” and
be ready for normal operation within tREC time. As an alternative
method of determining when the device is ready, the master can
send read or write commands and look for an ACK. While the
device is waking up, it will NACK the master until it is ready.
Figure 15. Sleep Mode Entry
Start
Address
By Master
S
Rsvd Slave ID (F8)
A
Start
Slave Address X X A
By F-RAM
Device ID
The FM24V10 device incorporates a means of identifying the
device by providing three bytes of data, which are manufacturer
ID, product ID, and die revision. The Device ID is read-only. It
can be accessed as follows:
1. The master sends a START command.
2. The master sends Reserved Slave ID F8h.
3. The FM24V10 sends an ACK.
Document Number: 001-84463 Rev. *G
S
Address
Rsvd Slave ID (86)
Stop
A
P
Acknowledge
4. The master sends the I2C-bus slave address of the
device it needs to identify. The last bit is a 'Don't care'
(page select and R/W bits). Only one device
acknowledge this byte (the one that has the I2C-bus
address).
5. The FM24V10 sends an ACK.
6. The master sends a Re-START command.
7. The master sends Reserved Slave ID F9h.
8. The FM24V10 sends an ACK.
slave
value
must
slave
Page 9 of 22
FM24V10
9. The Device ID Read can be done, starting with the 12
manufacturer bits, followed by the 9 device identification bits,
and then the 3 die revision bits.
10.The master ends the Device ID read sequence by NACKing
the last byte, thus resetting the slave device state machine
and allowing the master to send the STOP command.
Note The reading of the Device ID can be stopped anytime by
sending a NACK command.
Table 1. Device ID
23–12
(12 bits)
Device ID
(3 bytes)
Device
Manufacturer ID
FM24V10
FM24VN10
004400h
004480h
000000000100
000000000100
Device ID Description
11–8
7–3
(4 bits)
(5 bits)
Product ID
Density
Variation
0100
N0000
0100
10000
2–0
(3 bits)
Die Rev
000
000
Note Product ID bit 4 = S/N, Product ID bit 0 = reserved.
Figure 16. Read Device ID
Start
Address
By Master
No
Acknowledge
Acknowledge
Address
Start
Stop
S
Rsvd Slave ID (F8)
A
Slave Address X X A
S
Rsvd Slave ID (F9)
A
Data Byte
A
Data Byte
By F-RAM
A
Data Byte
1
P
Data
Acknowledge
Unique Serial Number (FM24VN10 only)
The FM24VN10 device also incorporates a read-only 8-byte
serial number. It can be used to uniquely identify a pc board or
system. The serial number includes a 40-bit unique number, an
8-bit CRC, and a 16-bit number that can be defined upon request
by the customer. If a customer-specific number is not requested,
the 16-bit Customer Identifier is 0000h. The 8 bytes of data are
accessed via a slave address sequence similar to the Device ID.
The serial number can be read by the system as follows:
1. The master sends a START command
2. The master sends Reserved Slave ID F8h
3. The FM24VN10 sends an ACK.
4. The master sends the I2C-bus slave address of the slave
device it needs to identify. The last two bits are 'Don't care'
values. Only one device must acknowledge this byte (the one
that has the I2C-bus slave address).
5. The FM24VN10 sends an ACK.
6. The master sends a Re-START command
7. The master sends Reserved Slave ID CDh to read the serial
number.
8. The FM24VN10 sends an ACK.
9. The master ends the serial number read sequence by
NACKing the last byte, thus resetting the slave device state
machine and allowing the master to send the STOP
command.
The 8-bit CRC value can be used to compare to the value calculated by the controller. If the two values match, then the communication between slave and master was performed without
errors. The function (shown in page 11) is used to calculate the
CRC value. To perform the calculation, 7 bytes of data are filled
into a memory buffer in the same order as they are read from the
part - i.e. byte7, byte6, byte5, byte4, byte3, byte2, byte1 of the
serial number. The calculation is performed on the 7 bytes, and
the result should match the final byte out from the part which is
byte0, the 8-bit CRC value.
Table 2. 8-Byte Serial Number (read-only)
Customer IDENTIFIER
SN(63-56)
40-bit UNIQUE NUMBER
SN(55-48)
SN(47-40)
SN(39-32)
SN(31-24)
8-bit CRC
SN(23-16)
SN(15-8)
SN(7-0)
Note Contact factory for requesting a customer identifier number.
Figure 17. 8-byte Serial Number (read-only)
Start
Address
By Master
Address
Start
No
Acknowledge
Acknowledge
Stop
S
Rsvd Slave ID (F8)
A
Slave Address
X X A
S
Rsvd Slave ID (CD)
A
Data Byte 7
A
A
Data Byte 0
1
P
By F-RAM
Acknowledge
Document Number: 001-84463 Rev. *G
Data
Page 10 of 22
FM24V10
Function to Calculate CRC
BYTE calcCRC8( BYTE* pData, int nBytes )
{
static BYTE crctable[256] = {
0x00, 0x07, 0x0E, 0x09, 0x1C, 0x1B, 0x12, 0x15,
0x38, 0x3F, 0x36, 0x31, 0x24, 0x23, 0x2A, 0x2D,
0x70, 0x77, 0x7E, 0x79, 0x6C, 0x6B, 0x62, 0x65,
0x48, 0x4F, 0x46, 0x41, 0x54, 0x53, 0x5A, 0x5D,
0xE0, 0xE7, 0xEE, 0xE9, 0xFC, 0xFB, 0xF2, 0xF5,
0xD8, 0xDF, 0xD6, 0xD1, 0xC4, 0xC3, 0xCA, 0xCD,
0x90, 0x97, 0x9E, 0x99, 0x8C, 0x8B, 0x82, 0x85,
0xA8, 0xAF, 0xA6, 0xA1, 0xB4, 0xB3, 0xBA, 0xBD,
0xC7, 0xC0, 0xC9, 0xCE, 0xDB, 0xDC, 0xD5, 0xD2,
0xFF, 0xF8, 0xF1, 0xF6, 0xE3, 0xE4, 0xED, 0xEA,
0xB7, 0xB0, 0xB9, 0xBE, 0xAB, 0xAC, 0xA5, 0xA2,
0x8F, 0x88, 0x81, 0x86, 0x93, 0x94, 0x9D, 0x9A,
0x27, 0x20, 0x29, 0x2E, 0x3B, 0x3C, 0x35, 0x32,
0x1F, 0x18, 0x11, 0x16, 0x03, 0x04, 0x0D, 0x0A,
0x57, 0x50, 0x59, 0x5E, 0x4B, 0x4C, 0x45, 0x42,
0x6F, 0x68, 0x61, 0x66, 0x73, 0x74, 0x7D, 0x7A,
0x89, 0x8E, 0x87, 0x80, 0x95, 0x92, 0x9B, 0x9C,
0xB1, 0xB6, 0xBF, 0xB8, 0xAD, 0xAA, 0xA3, 0xA4,
0xF9, 0xFE, 0xF7, 0xF0, 0xE5, 0xE2, 0xEB, 0xEC,
0xC1, 0xC6, 0xCF, 0xC8, 0xDD, 0xDA, 0xD3, 0xD4,
0x69, 0x6E, 0x67, 0x60, 0x75, 0x72, 0x7B, 0x7C,
0x51, 0x56, 0x5F, 0x58, 0x4D, 0x4A, 0x43, 0x44,
0x19, 0x1E, 0x17, 0x10, 0x05, 0x02, 0x0B, 0x0C,
0x21, 0x26, 0x2F, 0x28, 0x3D, 0x3A, 0x33, 0x34,
0x4E, 0x49, 0x40, 0x47, 0x52, 0x55, 0x5C, 0x5B,
0x76, 0x71, 0x78, 0x7F, 0x6A, 0x6D, 0x64, 0x63,
0x3E, 0x39, 0x30, 0x37, 0x22, 0x25, 0x2C, 0x2B,
0x06, 0x01, 0x08, 0x0F, 0x1A, 0x1D, 0x14, 0x13,
0xAE, 0xA9, 0xA0, 0xA7, 0xB2, 0xB5, 0xBC, 0xBB,
0x96, 0x91, 0x98, 0x9F, 0x8A, 0x8D, 0x84, 0x83,
0xDE, 0xD9, 0xD0, 0xD7, 0xC2, 0xC5, 0xCC, 0xCB,
0xE6, 0xE1, 0xE8, 0xEF, 0xFA, 0xFD, 0xF4, 0xF3
};
BYTE crc = 0;
.................... while( nBytes-- ) crc = crctable[crc ^ *pData++];
return crc;
}
Document Number: 001-84463 Rev. *G
Page 11 of 22
FM24V10
Maximum Ratings
Surface mount lead soldering
temperature (10 seconds) ....................................... +260 C
Exceeding maximum ratings may shorten the useful life of the
device. These user guidelines are not tested.
Storage temperature ................................ –55 C to +125 C
Electrostatic Discharge Voltage
Human Body Model (AEC-Q100-002 Rev. E) .................. 2.5 kV
Charged Device Model (AEC-Q100-011 Rev. B) ............. 1.25 kV
Maximum accumulated storage time
At 125 °C ambient temperature ................................. 1000 h
At 85 °C ambient temperature ................................ 10 Years
Latch-up current .................................................... > 140 mA
Ambient temperature
with power applied ................................... –55 °C to +125 °C
* Exception: The “VIN < VDD + 1.0 V” restriction does not apply
to the SCL and SDA inputs.
Supply voltage on VDD relative to VSS .........–1.0 V to +4.5 V
Operating Range
Machine Model (AEC-Q100-003 Rev. E) ............................ 200 V
Input voltage .......... –1.0 V to + 4.5 V and VIN < VDD + 1.0 V
Range
Ambient Temperature (TA)
VDD
DC voltage applied to outputs
in High-Z state .................................... –0.5 V to VDD + 0.5 V
Industrial
–40 C to +85 C
2.0 V to 3.6 V
Transient voltage (< 20 ns) on
any pin to ground potential ................. –2.0 V to VDD + 2.0 V
Package power dissipation
capability (TA = 25 °C) ................................................. 1.0 W
DC Electrical Characteristics
Over the Operating Range
Parameter
Description
VDD
Power supply
IDD
Average VDD current
Test Conditions
SCL toggling
between
VDD – 0.2 V and VSS,
other inputs VSS or
VDD – 0.2 V.
Min
Typ [1]
Max
Unit
2.0
3.3
3.6
V
fSCL = 100 kHz
–
–
175
A
fSCL = 1 MHz
–
–
400
A
fSCL = 3.4 MHz
–
–
1000
A
ISB
Standby current
SCL = SDA = VDD. All other inputs VSS
or VDD. Stop command issued.
–
90
150
A
IZZ
Sleep mode current
SCL = SDA = VDD. All other inputs VSS
or VDD. Stop command issued.
–
5
8
A
ILI
Input leakage current
(Except WP and A2-A1)
VSS < VIN < VDD
–1
–
+1
A
Input leakage current
(for WP and A2-A1)
VSS < VIN < VDD
–1
–
+100
A
ILO
Output leakage current
VSS < VIN < VDD
VIH
Input HIGH voltage
VIL
Input LOW voltage
VOL1
Output LOW voltage
IOL = 2 mA, VDD > 2.7 V
VOL2
Output LOW voltage
IOL = 150 A
Rin[2]
Input resistance (WP, A2-A1)
For VIN = VIL (Max)
For VIN = VIH (Min)
1
–1
–
+1
A
0.7 × VDD
–
VDD + 0.3
V
– 0.3
–
0.3 × VDD
V
–
–
0.4
V
–
–
0.2
V
50
–
–
k
–
–
M
Notes
1. Typical values are at 25 °C, VDD = VDD (typ). Not 100% tested.
2. The input pull-down circuit is strong (50 k) when the input voltage is below VIL and weak (1 M) when the input voltage is above VIH.
Document Number: 001-84463 Rev. *G
Page 12 of 22
FM24V10
Data Retention and Endurance
Parameter
TDR
NVC
Description
Test condition
TA = 85 C
Data retention
Endurance
Min
Max
Unit
10
–
Years
TA = 75 C
38
–
TA = 65 C
151
–
Over operating temperature
1014
–
Cycles
Capacitance
Parameter [3]
Description
Test Conditions
CO
Output pin capacitance (SDA)
CI
Input pin capacitance
Max
Unit
8
pF
6
pF
TA = 25 C, f = 1 MHz, VDD = VDD(typ)
Thermal Resistance
Parameter [3]
JA
JC
Description
Thermal resistance
(junction to ambient)
Thermal resistance
(junction to case)
Test Conditions
8-pin SOIC
Unit
Test conditions follow standard test methods
and procedures for measuring thermal
impedance, per EIA / JESD51.
138
C/W
40
C/W
AC Test Loads and Waveforms
Figure 18. AC Test Loads and Waveforms
3.6 V
1.8 k
OUTPUT
100 pF
AC Test Conditions
Input pulse levels .................................10% and 90% of VDD
Input rise and fall times .................................................10 ns
Input and output timing reference levels ................0.5 × VDD
Output load capacitance ............................................ 100 pF
Note
3. These parameters are guaranteed by design and are not tested.
Document Number: 001-84463 Rev. *G
Page 13 of 22
FM24V10
AC Switching Characteristics
Over the Operating Range
Alt.
Parameter[4] Parameter
F/S-mode [6]
Description
Hs-mode[6]
Unit
Min
Max
Min
Max
–
1.0
–
3.4
MHz
fSCL[5]
SCL clock frequency
tSU; STA
Start condition setup for repeated Start
260
–
160
–
ns
tHD;STA
Start condition hold time
260
–
160
–
ns
tLOW
Clock LOW period
500
–
160
–
ns
tHIGH
Clock HIGH period
260
–
60
–
ns
tSU;DAT[7]
tSU;DATA
Data in setup
50
–
10
–
ns
tHD;DAT
tHD;DATA
Data in hold
0
–
0
–
ns
Data output hold (from SCL @ VIL)
0
–
0
–
ns
tR[8]
tr
Input rise time
–
120
–
80
ns
tF[8]
tf
Input fall time
–
120
–
80
ns
260
–
160
–
ns
tDH
STOP condition setup
tSU;STO
SCL LOW to SDA Data Out Valid
–
450
–
130
ns
tBUF
tVD;DATA
Bus free before new transmission
500
–
300
–
ns
tSP
Noise suppression time constant on SCL, SDA
–
50
–
5
ns
tAA
Figure 19. Read Bus Timing Diagram
tHIGH
tR
`
tF
tSP
tLOW
tSP
SCL
tSU:SDA
1/fSCL
tBUF
tHD:DAT
tSU:DAT
SDA
tDH
tAA
Stop Start
Start
Acknowledge
Figure 20. Write Bus Timing Diagram
tHD:DAT
SCL
tHD:STA
tSU:STO
tSU:DAT
tAA
SDA
Start
Stop Start
Acknowledge
Notes
4. Test conditions assume signal transition time of 10 ns or less, timing reference levels of VDD/2, input pulse levels of 0 to VDD(typ), and output loading of the specified
IOL and load capacitance shown in Figure 18.
5. The speed-related specifications are guaranteed characteristic points along a continuous curve of operation from DC to fSCL (max).
6. Bus Load (Cb) considerations; Cb < 500 pF for I2C clock frequency (SCL) 1 MHz; Cb < 100 pF for SCL at 3.4 MHz.
7. In Hs-mode and VDD < 2.7 V, the tSU:DAT (min.) spec is 15 ns.
8. These parameters are guaranteed by design and are not tested.
Document Number: 001-84463 Rev. *G
Page 14 of 22
FM24V10
Power Cycle Timing
Over the Operating Range
Parameter
Description
Min
Max
Unit
250
–
µs
tPU
Power-up VDD(min) to first access (START condition)
tPD
Last access (STOP condition) to power-down (VDD(min))
0
–
µs
tVR [9, 10]
VDD power-up ramp rate
50
–
µs/V
tVF [9, 10]
VDD power-down ramp rate
100
–
µs/V
tREC [10]
Recovery time from sleep mode
–
400
µs
VDD
~
~
Figure 21. Power Cycle Timing
VDD(min)
tVR
SDA
I2 C START
tVF
tPD
~
~
tPU
VDD(min)
I2 C STOP
Notes
9. Slope measured at any point on the VDD waveform.
10. Guaranteed by design.
Document Number: 001-84463 Rev. *G
Page 15 of 22
FM24V10
Ordering Information
Package
Diagram
Ordering Code
FM24V10-G
51-85066
Package Type
8-pin SOIC
Operating
Range
Industrial
FM24V10-GTR
FM24VN10-G
8-pin SOIC, Serial Number
FM24VN10-GTR
All these parts are Pb-free. Contact your local Cypress sales representative for availability of these parts.
Ordering Code Definitions
FM 24
V N 10 - G
TR
Option:
Blank = Standard; TR = Tape and Reel
Package Type:
G = 8-pin SOIC
Density: 10 = 1-Mbit
N = Serial Number
Voltage: V = 2.0 V to 3.6 V
I2C F-RAM
Cypress
Document Number: 001-84463 Rev. *G
Page 16 of 22
FM24V10
Package Diagram
Figure 22. 8-pin SOIC (150 Mils) Package Outline, 51-85066
51-85066 *F
Document Number: 001-84463 Rev. *G
51-85066 *G
Page 17 of 22
FM24V10
Acronyms
Acronym
Document Conventions
Description
Units of Measure
ACK
Acknowledge
CMOS
Complementary Metal Oxide Semiconductor
°C
degree Celsius
EIA
Electronic Industries Alliance
Hz
hertz
I2C
Inter-Integrated Circuit
Kb
1024 bit
I/O
Input/Output
kHz
kilohertz
JEDEC
Joint Electron Devices Engineering Council
k
kilohm
MHz
megahertz
M
megaohm
A
microampere
s
microsecond
mA
milliampere
Symbol
Unit of Measure
LSB
Least Significant Bit
MSB
Most Significant Bit
NACK
No Acknowledge
RoHS
Restriction of Hazardous Substances
R/W
Read/Write
ms
millisecond
SCL
Serial Clock Line
ns
nanosecond
SDA
Serial Data Access
ohm
SOIC
Small Outline Integrated Circuit
%
percent
WP
Write Protect
pF
picofarad
V
volt
W
watt
Document Number: 001-84463 Rev. *G
Page 18 of 22
FM24V10
Errata
This document describes the errata for the serial I2C F-RAM FM24V10/FM24VN10 (1-Mbit) product. Details include errata trigger
conditions, scope of impact, available workarounds, and silicon revision applicability. Compare this document to the device's datasheet
for a complete functional description.
Contact your local Cypress Sales Representative if you have questions. You can also send your related queries directly to
[email protected].
Part Numbers Affected
Part Number
Device Characteristics
FM24V10
1-Mbit (128 K × 8) Serial (I2C) F-RAM with Device ID, 2.0 V to 3.6 V, Industrial temperature
FM24VN10
1-Mbit (128 K × 8) Serial (I2C) F-RAM with Device ID and Unique Serial Number, 2.0 V to 3.6 V, Industrial
temperature
FM24V10/FM24VN10 I2C F-RAM Qualification Status
Production parts.
FM24V10/FM25VN10 Errata Summary
The following table defines the errata applicability to available FM24V10/FM24VN10 devices.
Items
Part Number
1. The I2C F-RAM enters Sleep mode without the
STOP condition
FM24V10-G
FM24V10-GTR
FM24VN10-G
FM24VN10-GTR
Silicon Revision
Rev A
Fix Status
None.
1. The I2C F-RAM enters Sleep mode without the STOP condition
■
Problem Definition
When the I2C master sends the last Reserved Slave ID (86h) of the Sleep command sequence, as shown in Figure 23, the I2C
F-RAM returns an acknowledgement (ACK) and releases the SDA line after the rising edge of the 9th clock. If this LOW to HIGH
transition on the SDA line happens when the I2C clock is HIGH, it artificially generates an unintended STOP.
Figure 23. I2C F-RAM Sleep Cycle
■
Parameters Affected
None of the existing parameters are affected.
Document Number: 001-84463 Rev. *G
Page 19 of 22
FM24V10
■
Trigger Condition(S)
The I2C master sends the last Reserved Slave ID (86h) of the Sleep command and receives an ACK from the I2C F-RAM. The I2C
F-RAM starts entering the Sleep mode from the 9th rising edge of the I2C clock and releases the SDA line when in the Sleep mode.
The LOW to HIGH transition on the SDA line when I2C clock is HIGH generates an unintended STOP.
■
Scope of Impact
The ongoing I2C communication can be disrupted due to unintended STOP generated by the I2C F-RAM slave.
■
Workaround
This issue can be mitigated by implementing one of the following two methods:
The I2C master ignores any unintended STOP generated by the I2C F-RAM slave.
2
2
❐ The I C master latches the ACK on the 9th rising edge of the I C clock and starts driving the SDA line LOW. This will ensure when
the I2C F-RAM enters Sleep and releases the SDA line; it still remains LOW driven by the I2C master. This will prevent unintended
LOW to HIGH transition when SCL is LOW.
❐
■
Fix Status
This issue is applicable to all the existing I2C F-RAM parts shown in this errata. The existing parts are in production status and will
continue serving with errata. There is no plan to fix this issue in the existing silicon.
Document Number: 001-84463 Rev. *G
Page 20 of 22
FM24V10
Document History Page
Document Title: FM24V10, 1-Mbit (128 K × 8) Serial (I2C) F-RAM
Document Number: 001-84463
Rev.
ECN No.
Submission
Date
Orig. of
Change
**
3902204
02/25/2013
GVCH
New spec
*A
3996669
05/13/2013
GVCH
Added Appendix A - Errata for FM24V10 and FM24VN10
*B
4045469
06/30/2013
GVCH
All errata items are fixed and the errata is removed.
*C
4283424
02/18/2014
GVCH
Converted to Cypress standard format
Updated Maximum Ratings table
- Removed Moisture Sensitivity Level (MSL)
- Added junction temperature and latch up current
Added Input leakage current (ILI) for WP and A2-A1
Updated Data Retention and Endurance table
Added Thermal Resistance table
Removed Package Marking Scheme (top mark)
*D
4564960
11/10/2014
GVCH
Updated Functional Description:
Added “For a complete list of related documentation, click here.” at the end.
*E
4700243
03/26/2015
GVCH
Updated Package Diagram:
spec 51-85066 – Changed revision from *F to *G.
Added Errata.
*F
4781095
05/29/2015
GVCH
Updated Ordering Information:
Fixed Typo (Replaced “001-85066” with “51-85066” in “Package Diagram”
column).
Updated to new template.
*G
4874648
08/06/2015
Document Number: 001-84463 Rev. *G
Description of Change
ZSK / PSR Updated Maximum Ratings:
Removed “Maximum junction temperature”.
Added “Maximum accumulated storage time”.
Added “Ambient temperature with power applied”.
Page 21 of 22
FM24V10
Sales, Solutions, and Legal Information
Worldwide Sales and Design Support
Cypress maintains a worldwide network of offices, solution centers, manufacturer’s representatives, and distributors. To find the office
closest to you, visit us at Cypress Locations.
PSoC® Solutions
Products
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cypress.com/go/interface
cypress.com/go/powerpsoc
psoc.cypress.com/solutions
PSoC 1 | PSoC 3 | PSoC 4 | PSoC 5LP
Cypress Developer Community
Community | Forums | Blogs | Video | Training
cypress.com/go/memory
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Technical Support
cypress.com/go/support
cypress.com/go/USB
cypress.com/go/wireless
© Cypress Semiconductor Corporation, 2013-2015. The information contained herein is subject to change without notice. Cypress Semiconductor Corporation assumes no responsibility for the use of
any circuitry other than circuitry embodied in a Cypress product. Nor does it convey or imply any license under patent or other rights. Cypress products are not warranted nor intended to be used for
medical, life support, life saving, critical control or safety applications, unless pursuant to an express written agreement with Cypress. Furthermore, Cypress does not authorize its products for use as
critical components in life-support systems where a malfunction or failure may reasonably be expected to result in significant injury to the user. The inclusion of Cypress products in life-support systems
application implies that the manufacturer assumes all risk of such use and in doing so indemnifies Cypress against all charges.
Any Source Code (software and/or firmware) is owned by Cypress Semiconductor Corporation (Cypress) and is protected by and subject to worldwide patent protection (United States and foreign),
United States copyright laws and international treaty provisions. Cypress hereby grants to licensee a personal, non-exclusive, non-transferable license to copy, use, modify, create derivative works of,
and compile the Cypress Source Code and derivative works for the sole purpose of creating custom software and or firmware in support of licensee product to be used only in conjunction with a Cypress
integrated circuit as specified in the applicable agreement. Any reproduction, modification, translation, compilation, or representation of this Source Code except as specified above is prohibited without
the express written permission of Cypress.
Disclaimer: CYPRESS MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARD TO THIS MATERIAL, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. Cypress reserves the right to make changes without further notice to the materials described herein. Cypress does not
assume any liability arising out of the application or use of any product or circuit described herein. Cypress does not authorize its products for use as critical components in life-support systems where
a malfunction or failure may reasonably be expected to result in significant injury to the user. The inclusion of Cypress’ product in a life-support systems application implies that the manufacturer
assumes all risk of such use and in doing so indemnifies Cypress against all charges.
Use may be limited by and subject to the applicable Cypress software license agreement.
Document Number: 001-84463 Rev. *G
Revised August 6, 2015
All products and company names mentioned in this document may be the trademarks of their respective holders.
Page 22 of 22