M24C64-WBN6P STMicroelectronics, M24C64-WBN6P Datasheet - Page 19

• Manufacturer Part Number: M24C64-WBN6P
• Description: IC EEPROM 64KBIT 400KHZ 8DIP
• Manufacturer: STMicroelectronics

Specifications of M24C64-WBN6P

• Format - Memory: EEPROMs - Serial
• Memory Type: EEPROM
• Memory Size: 64K (8K x 8)
• Speed: 400kHz
• Interface: I²C, 2-Wire Serial
• Voltage - Supply: 2.5 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 8-DIP (0.300", 7.62mm)
• Organization: 8 K x 8
• Interface Type: I2C
• Maximum Clock Frequency: 0.4 MHz
• Access Time: 900 ns
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 2.5 V
• Maximum Operating Current: 2 mA
• Maximum Operating Temperature: + 85 C
• Mounting Style: Through Hole
• Minimum Operating Temperature: - 40 C
• Operating Supply Voltage: 2.5 V, 5.5 V
• Memory Organization: 8K X 8
• Clock Speed: 400MHz
• No. Of Pins: 8
• Operating Temperature Range: -40°C To +85°C
• Ic Generic Number: 24C64
• Memory Voltage, Vcc: 2.5V
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-8575; M24C64-WBN6P

M24C64-DF, M24C64-W, M24C64-R, M24C64-F
4.12
Figure 11. Write cycle polling flowchart using ACK
Minimizing system delays by polling on ACK
During the internal Write cycle, the device disconnects itself from the bus, and writes a copy
of the data from its internal latches to the memory cells. The maximum Write time (t
shown in
be used by the bus master.
The sequence, as shown in
1.
2.
3.
First byte of instruction
with RW = 0 already
decoded by the device
Initial condition: a Write cycle is in progress.
Step 1: the bus master issues a Start condition followed by a device select code (the
first byte of the new instruction).
Step 2: if the device is busy with the internal Write cycle, no Ack will be returned and
the bus master goes back to Step 1. If the device has terminated the internal Write
cycle, it responds with an Ack, indicating that the device is ready to receive the second
part of the instruction (the first byte of this instruction having been sent during Step 1).
Table 16
, but the typical time is shorter. To make use of this, a polling sequence can
ReStart
Stop
NO
Figure
Doc ID 16891 Rev 23
NO
Start condition
Device select
addressing the
with RW = 0
in progress
operation is
Write cycle
Returned
11, is:
memory
ACK
Next
YES
Write operation
Write operation
Continue the
Data for the
YES
NO
and receive ACK
Send address
condition
Start
Random Read operation
Device select
Continue the
with RW = 1
YES
Device operation
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) is
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