ST M24C16-W, M24C16-R, M24C16-F, M24C08-W, M24C08-R User Manual
...
16 Kbit, 8 Kbit, 4 Kbit, 2 Kbit and 1 Kbit serial I²C bus EEPROM
PDIP8 (BN)
SO8 (MN)
150 mils width
TSSOP8 (DW)
169 mils width
UFDFPN8 (MB, MC)
2 × 3 mm (MLP)
WLCSP (CS)
(1)
Thin WLCSP (CT)
(2)
Features
■ Supports both the 100 kHz I
and the 400 kHz I
■ Single supply voltage:
– 2.5 V to 5.5 V for M24Cxx-W
– 1.8 V to 5.5 V for M24Cxx
– 1.7 V to 5.5 V for M24Cxx-F
■ Write Control input
■ Byte and Page Write (up to 16 bytes)
■ Random and Sequential Read modes
■ Self-timed programming cycle
■ Automatic address incrementing
■ Enhanced ESD/latch-up protection
■ More than 1 million write cycles
■ More than 40-year data retention
■ Packages:
– SO8, TSSOP8, UFDFPN8: ECOPACK2
(RoHS-compliant and Halogen-free)
– PDIP8: ECOPACK1
Table 1. Device summary
Reference Part number
M24C16-x
M24C08-x
M24C04-x
M24C02-x
M24C01-x
2
C Fast-mode
®
(RoHS-compliant)
M24C04-x M24C02-x M24C01-x
2
C Standard-mode
M24C16-W
M24C16-R
M24C16-F
M24C08-W
M24C08-R
M24C08-F
M24C04-W
M24C04-R
M24C04-F
M24C02-W
M24C02-R
M24C01-W
M24C01-R
M24C16-x M24C08-x
®
1. Only M24C08-F and M24C16-F devices are offered in
the WLCSP package.
2. Only M24C08-F devices are offered in the Thin
WLCSP package.
April 2011 Doc ID 5067 Rev 17 1/38
www.st.com
1
Contents M24C16, M24C08, M24C04, M24C02, M24C01
Contents
1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2 Signal description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.1 Serial Clock (SCL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.2 Serial Data (SDA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.3 Chip Enable (E0, E1, E2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.3.1 Write Control (WC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.4 Supply voltage (VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.4.1 Operating supply voltage V
CC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.4.2 Power-up conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.4.3 Device reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.4.4 Power-down conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3 Device operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.1 Start condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.2 Stop condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.3 Acknowledge bit (ACK) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.4 Data input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.5 Memory addressing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.6 Write operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.6.1 Byte Write . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3.6.2 Page Write . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3.6.3 Minimizing system delays by polling on ACK . . . . . . . . . . . . . . . . . . . . . 16
3.7 Read operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
3.7.1 Random Address Read . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
3.7.2 Current Address Read . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
3.7.3 Sequential Read . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
3.7.4 Acknowledge in Read mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4 Initial delivery state . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
5 Maximum rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
6 DC and AC parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
2/38 Doc ID 5067 Rev 17
M24C16, M24C08, M24C04, M24C02, M24C01 Contents
7 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
8 Part numbering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
9 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Doc ID 5067 Rev 17 3/38
List of tables M24C16, M24C08, M24C04, M24C02, M24C01
List of tables
Table 1. Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Table 2. Signal names . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Table 3. Device select code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Table 4. Operating modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Table 5. Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Table 6. Operating conditions (M24Cxx-W) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Table 7. Operating conditions (M24Cxx-R) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Table 8. Operating conditions (M24Cxx-F) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Table 9. DC characteristics (M24Cxx-W, device grade 6) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Table 10. DC characteristics (M24Cxx-W, device grade 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Table 11. DC characteristics (M24Cxx-R) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Table 12. DC characteristics (M24Cxx-F) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Table 13. AC measurement conditions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Table 14. Input parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Table 15. AC characteristics at 400 kHz (I
M24Cxx-F) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Table 16. AC characteristics at 100 kHz (I
M24Cxx-R, M24Cxx-F) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Table 17. M24C08: WLCSP (0.5 mm height) 0.4 mm pitch, 5 bumps, package data . . . . . . . . . . . . 27
Table 18. M24C08: Thin WLCSP (0.3 mm height), 0.4 mm pitch, 5 bumps, package data . . . . . . . . 28
Table 19. M24C16: WLCSP (0.5 mm height) 0.4 mm pitch, 5 bumps, package data . . . . . . . . . . . . 28
Table 20. SO8 narrow – 8 lead plastic small outline, 150 mils body width,
package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Table 21. UFDFPN8 (MLP8) 8-lead ultra thin fine pitch dual flat package no lead
2 x 3 mm, data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Table 22. TSSOP8 – 8 lead thin shrink small outline, package mechanical data. . . . . . . . . . . . . . . . 31
Table 23. PDIP8 – 8 pin plastic DIP, 0.25 mm lead frame, package mechanical data. . . . . . . . . . . . 32
Table 24. Ordering information scheme . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Table 25. Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
2
C Fast-mode) (M24Cxx-W, M24Cxx-R,
2
C Standard-mode) (M24Cxx-W,
4/38 Doc ID 5067 Rev 17
M24C16, M24C08, M24C04, M24C02, M24C01 List of figures
List of figures
Figure 1. Logic diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Figure 2. 8-pin package connections (top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Figure 3. WLCSP and thin WLCSP connections
(top view, marking side, with balls on the underside) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Figure 4. Device select code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Figure 5. Maximum R
Figure 6. I²C bus protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Figure 7. Write mode sequences with WC
Figure 8. Write mode sequences with WC
Figure 9. Write cycle polling flowchart using ACK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Figure 10. Read mode sequences . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Figure 11. AC measurement I/O waveform . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Figure 12. AC waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Figure 13. WLCSP (0.5 mm) and Thin WLCSP (0.3 mm) 0.4 mm pitch 5 bumps,
package outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Figure 14. SO8 narrow – 8 lead plastic small outline, 150 mils body width, package outline . . . . . . . 29
Figure 15. UFDFPN8 (MLP8) 8-lead ultra thin fine pitch dual flat package no lead
2 x 3 mm, outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Figure 16. TSSOP8 – 8 lead thin shrink small outline, package outline . . . . . . . . . . . . . . . . . . . . . . . 31
Figure 17. PDIP8 – 8 pin plastic DIP, 0.25 mm lead frame, package outline . . . . . . . . . . . . . . . . . . . 32
value versus bus parasitic capacitance (C) for an I²C bus . . . . . . . . . . . . . . 9
P
= 1 (data write inhibited) . . . . . . . . . . . . . . . . . . . . . . . . . 13
= 0 (data write enabled) . . . . . . . . . . . . . . . . . . . . . . . . . 15
Doc ID 5067 Rev 17 5/38
Description M24C16, M24C08, M24C04, M24C02, M24C01
AI02033
3
E0-E2 SDA
V
CC
M24Cxx
WC
SCL
V
SS
1 Description
These I²C-compatible electrically erasable programmable memory (EEPROM) devices are
organized as 2048/1024/512/256/128
M24C01).
Figure 1. Logic diagram
x 8 (M24C16, M24C08, M24C04, M24C02 and
I²C uses a two-wire serial interface, comprising a bidirectional data line and a clock line. The
devices carry a built-in 4-bit Device Type Identifier code (1010) in accordance with the I²C
bus definition.
The device behaves as a slave in the I²C protocol, with all memory operations synchronized
by the serial clock. Read and Write operations are initiated by a Start condition, generated
by the bus master. The Start condition is followed by a device select code and Read/
bit (R
W) (as described in Ta bl e 3), terminated by an acknowledge bit.
Write
When writing data to the memory, the device inserts an acknowledge bit during the 9th bit
time, following the bus master’s 8-bit transmission. When data is read by the bus master, the
bus master acknowledges the receipt of the data byte in the same way. Data transfers are
terminated by a Stop condition after an Ack for Write, and after a NoAck for Read.
Table 2. Signal names
Signal name Function Direction
E0, E1, E2 Chip Enable Input
SDA Serial Data Input/output
SCL Serial Clock Input
WC
V
CC
V
SS
Write Control Input
Supply voltage
Ground
6/38 Doc ID 5067 Rev 17
M24C16, M24C08, M24C04, M24C02, M24C01 Description
SDAV
SS
SCL
WC
V
CC
AI02034F
M24Cxx
1
2
3
4
8
7
6
5
16Kb / 8Kb / 4Kb / 2Kb / 1Kb
NC / NC / NC / E0 / E0
NC / NC / E1 / E1 / E1
NC / E2 / E2 / E2 / E2
V
CC
WC
SDA
SCL
V
SS
ai14908
Figure 2. 8-pin package connections (top view)
1. NC = Not connected
2. See Section 7: Package mechanical data for package dimensions, and how to identify pin-1.
3. The Ei inputs are not decoded, and are therefore decoded as “0” (See Section 2.3: Chip Enable (E0, E1,
E2) for more information).
Figure 3. WLCSP and thin WLCSP connections
(top view, marking side, with balls on the underside)
1. For devices of less than 16Kb (see Figure 2: 8-pin package connections (top view)), the Ei inputs are not
connected to a ball, therefore the Ei input is decoded as "0" (see also Section 2.3: Chip Enable (E0, E1,
E2))
Caution: EEPROM dice delivered in wafer form or in WLCSP package by STMicroelectronics must
never be exposed to ultra violet (UV) light, since EEPROM cells loose their charge (and so
their binary value) when exposed to UV light.
Doc ID 5067 Rev 17 7/38
Signal description M24C16, M24C08, M24C04, M24C02, M24C01
Ai11650
V
CC
M24Cxx
V
SS
E
i
V
CC
M24Cxx
V
SS
E
i
2 Signal description
2.1 Serial Clock (SCL)
This input signal is used to strobe all data in and out of the device. In applications where this
signal is used by slave devices to synchronize the bus to a slower clock, the bus master
must have an open drain output, and a pull-up resistor can be connected from Serial Clock
(SCL) to V
most applications, though, this method of synchronization is not employed, and so the pullup resistor is not necessary, provided that the bus master has a push-pull (rather than open
drain) output.
2.2 Serial Data (SDA)
This bidirectional signal is used to transfer data in or out of the device. It is an open drain
output that may be wire-ORed with other open drain or open collector signals on the bus. A
pull up resistor must be connected from Serial Data (SDA) to V
the value of the pull-up resistor can be calculated).
. (Figure 5 indicates how the value of the pull-up resistor can be calculated). In
CC
. (Figure 5 indicates how
CC
2.3 Chip Enable (E0, E1, E2)
These input signals are used to set the value that is to be looked for on the least significant
bits of the 7-bit device select code. These inputs must be tied to V
device select code as shown in
read as low (0).
Figure 4. Device select code
2.3.1 Write Control (WC)
This input signal is useful for protecting the entire contents of the memory from inadvertent
write operations. Write operations are disabled to the entire memory array when Write
Control (
Write operations are allowed.
When Write Control (WC) is driven High, device select and address bytes are
acknowledged, data bytes are not acknowledged.
WC) is driven High. When unconnected, the signal is internally read as VIL, and
or VSS, to establish the
CC
Figure 4. When not connected (left floating), Ei inputs are
8/38 Doc ID 5067 Rev 17
M24C16, M24C08, M24C04, M24C02, M24C01 Signal description
1
10
100
10 100 1000
Bus line capacitor (pF)
Bus line pull-up resistor
(k
)
When t
LOW
= 1.3 µs (min value for
f
C
= 400 kHz), the R
bus
× C
bus
time constant m ust be below the
400 ns time constant line
represented on the left.
I²C bus
master
M24xxx
R
bus
V
CC
C
bus
SCL
SDA
ai14796b
R
bus
× C
bus
= 400 ns
Here R
bus
× C
bus
= 120 ns
4 kΩ
30 pF
2.4 Supply voltage (VCC)
2.4.1 Operating supply voltage V
Prior to selecting the memory and issuing instructions to it, a valid and stable VCC voltage
within the specified [V
(min), VCC(max)] range must be applied (see Tab l e 6, Ta bl e 7 and
CC
Ta bl e 8). In order to secure a stable DC supply voltage, it is recommended to decouple the
VCC line with a suitable capacitor (usually of the order of 10 nF to 100 nF) close to the
V
CC/VSS
package pins.
This voltage must remain stable and valid until the end of the transmission of the instruction
and, for a Write instruction, until the completion of the internal write cycle (t
2.4.2 Power-up conditions
The VCC voltage has to rise continuously from 0 V up to the minimum VCC operating voltage
defined in
Ta bl e 6, Ta bl e 7 and Ta bl e 8 and the rise time must not vary faster than 1 V/µs.
2.4.3 Device reset
In order to prevent inadvertent write operations during power-up, a power-on-reset (POR)
circuit is included. At power-up (continuous rise of V
instruction until V
than the minimum V
VCC passes over the POR threshold, the device is reset and enters the Standby Power
mode. The device, however, must not be accessed until V
voltage within the specified [V
In a similar way, during power-down (continuous decrease in VCC), as soon as VCC drops
below the power-on-reset threshold voltage, the device stops responding to any instruction
sent to it.
reaches the power-on-reset threshold voltage (this threshold is lower
CC
operating voltage defined in Ta bl e 6, Ta bl e 7 and Ta bl e 8). When
CC
(min), VCC(max)] range.
CC
CC
).
W
), the device does not respond to any
CC
reaches a valid and stable VCC
CC
2.4.4 Power-down conditions
During power-down (continuous decrease in VCC), the device must be in the Standby Power
mode (mode reached after decoding a Stop condition, assuming that there is no internal
write cycle in progress).
Figure 5. Maximum RP value versus bus parasitic capacitance (C) for an I²C bus
Doc ID 5067 Rev 17 9/38
Signal description M24C16, M24C08, M24C04, M24C02, M24C01
SCL
SDA
SCL
SDA
SDA
Start
condition
SDA
Input
SDA
Change
AI00792c
Stop
condition
1 23 7 89
MSB
ACK
Start
condition
SCL
1 23 7 89
MSB ACK
Stop
condition
Figure 6. I²C bus protocol
Table 3. Device select code
Device type identifier
b7 b6 b5 b4 b3 b2 b1 b0
M24C01 select code 1 0 1 0 E2 E1 E0 RW
M24C02 select code 1 0 1 0 E2 E1 E0 RW
M24C04 select code 1 0 1 0 E2 E1 A8 RW
M24C08 select code 1 0 1 0 E2 A9 A8 RW
M24C16 select code 1 0 1 0 A10 A9 A8 RW
1. The most significant bit, b7, is sent first.
2. E0, E1 and E2 are compared against the respective external pins on the memory device.
3. A10, A9 and A8 represent most significant bits of the address.
10/38 Doc ID 5067 Rev 17
(1)
Chip Enable
(2),(3)
RW
M24C16, M24C08, M24C04, M24C02, M24C01 Device operation
3 Device operation
The device supports the I²C protocol. This is summarized in Figure 6. Any device that sends
data on to the bus is defined to be a transmitter, and any device that reads the data to be a
receiver. The device that controls the data transfer is known as the bus master, and the
other as the slave device. A data transfer can only be initiated by the bus master, which will
also provide the serial clock for synchronization. The device is always a slave in all
communication.
3.1 Start condition
Start is identified by a falling edge of Serial Data (SDA) while Serial Clock (SCL) is stable in
the High state. A Start condition must precede any data transfer command. The device
continuously monitors (except during a Write cycle) Serial Data (SDA) and Serial Clock
(SCL) for a Start condition.
3.2 Stop condition
Stop is identified by a rising edge of Serial Data (SDA) while Serial Clock (SCL) is stable
and driven High. A Stop condition terminates communication between the device and the
bus master. A Read command that is followed by NoAck can be followed by a Stop condition
to force the device into the Standby mode. A Stop condition at the end of a Write command
triggers the internal Write cycle.
3.3 Acknowledge bit (ACK)
The acknowledge bit is used to indicate a successful byte transfer. The bus transmitter,
whether it be bus master or slave device, releases Serial Data (SDA) after sending eight bits
of data. During the 9
th
acknowledge the receipt of the eight data bits.
3.4 Data input
During data input, the device samples Serial Data (SDA) on the rising edge of Serial Clock
(SCL). For correct device operation, Serial Data (SDA) must be stable during the rising edge
of Serial Clock (SCL), and the Serial Data (SDA) signal must change only when Serial Clock
(SCL) is driven Low.
clock pulse period, the receiver pulls Serial Data (SDA) Low to
Doc ID 5067 Rev 17 11/38
Device operation M24C16, M24C08, M24C04, M24C02, M24C01
3.5 Memory addressing
To start communication between the bus master and the slave device, the bus master must
initiate a Start condition. Following this, the bus master sends the device select code, shown
in
Ta bl e 3 (on Serial Data (SDA), most significant bit first).
The device select code consists of a 4-bit Device Type Identifier, and a 3-bit Chip Enable
“Address” (E2, E1, E0). To address the memory array, the 4-bit Device Type Identifier is
1010b.
Each device is given a unique 3-bit code on the Chip Enable (E0, E1, E2) inputs. When the
device select code is received, the device only responds if the Chip Enable Address is the
same as the value on the Chip Enable (E0, E1, E2) inputs. However, those devices with
larger memory capacities (the M24C16, M24C08 and M24C04) need more address bits. E0
is not available for use on devices that need to use address line A8; E1 is not available for
devices that need to use address line A9, and E2 is not available for devices that need to
use address line A10 (see
up to eight M24C02 (or M24C01), four M24C04, two M24C08 or one M24C16 devices can
be connected to one I²C bus. In each case, and in the hybrid cases, this gives a total
memory capacity of 16
The 8th bit is the Read/Write bit (RW). This bit is set to 1 for Read and 0 for Write operations.
Figure 2 and Ta bl e 3 for details). Using the E0, E1 and E2 inputs,
Kbits, 2 KBytes (except where M24C01 devices are used).
If a match occurs on the device select code, the corresponding device gives an
acknowledgment on Serial Data (SDA) during the 9
th
bit time. If the device does not match
the device select code, it deselects itself from the bus, and goes into Standby mode.
Table 4. Operating modes
Mode RW bit WC
Current Address Read 1 X 1 Start, Device Select, RW
0X
Random Address Read
1 X reStart, Device Select, RW
Sequential Read 1 X ≥ 1
Byte Write 0 V
Page Write 0 V
1. X = V
IH
or V
.
IL
(1)
Bytes Initial sequence
= 1
Start, Device Select, RW
= 0, Address
1
= 1
Similar to Current or Random Address
Read
IL
IL
1 Start, Device Select, RW = 0
≤ 16 Start, Device Select, RW = 0
12/38 Doc ID 5067 Rev 17
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