M24128-BRDW6TP STMicroelectronics, M24128-BRDW6TP Datasheet - Page 18

• Manufacturer Part Number: M24128-BRDW6TP
• Description: IC EEPROM 128KBIT 400KHZ 8TSSOP
• Manufacturer: STMicroelectronics

Specifications of M24128-BRDW6TP

• Format - Memory: EEPROMs - Serial
• Memory Type: EEPROM
• Memory Size: 128K (16K x 8)
• Speed: 400kHz
• Interface: I²C, 2-Wire Serial
• Voltage - Supply: 1.8 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 8-TSSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-8618-2; M24128-BRDW6TP

Device operation
4.10
18/39
Figure 10. 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 16892 Rev 19
NO
Start condition
Device select
addressing the
with RW = 0
in progress
operation is
Write cycle
Returned
10, is:
memory
ACK
Next
YES
Write operation
Write operation
Continue the
Data for the
YES
NO
M24128-BW, M24128-BR, M24128-BF
and receive ACK
Send address
condition
Start
Random Read operation
Device select
Continue the
with RW = 1
YES
AI01847d
w
) is