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M2201VDW1 View Datasheet(PDF) - STMicroelectronics

Part Name
Description
Manufacturer
M2201VDW1
ST-Microelectronics
STMicroelectronics ST-Microelectronics
M2201VDW1 Datasheet PDF : 15 Pages
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M2201
DEVICE OPERATION (cont’d)
duced by an ACK polling sequence issued by the
master. The sequence is as follows:
– Initial condition: a Write is in progress (see Fig-
ure 7).
– Step 1: the Master issues a START condition
followed by a Device Select byte (1st byte of
the new instruction).
– Step 2: if the memory is busy with the internal
write cycle, no ACK will be returned and the
master goes back to Step 1. If the memory
has terminated the internal write cycle, it will
respond with an ACK, indicating that the mem-
ory is ready to receive the second part of the
next instruction (the first byte of this instruc-
tion was already sent during Step 1).
Figure 7. Write Cycle Polling using ACK
WRITE Cycle
in Progress
START Condition
Byte Address
with RW = 0
NO ACK
Returned
YES
NO
ReSTART
STOP
Next
Operation is
WRITE
YES
Send
DATA BYTE
STOP
AI01049
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