X76F640 Datasheet, PDF (5/17 Pages) Xicor Inc. – Secure SerialFlash

X76F640
PROGRAM OPERATIONS
Sector Programming
The sector program mode requires issuing the 8-bit write
command followed by the password, password Ack com-
mand, the address and then the data bytes transferred as
illustrated in figure 4. Up to 32 bytes may be trans-
ferred. After the last byte to be transferred is acknowl-
edged a stop condition is issued which starts the
nonvolatile write cycle.
Figure 4. Sector Programming
SDA _S
COMMAND
Write
Password
7
If ACK, Then
Password Matches
ACK POLLING
COMMAND
S
Write
Password
0
Wait tWC OR
Repeated
ACK Polling
Command
Data 0
...
Data 31
S
Wait tWC Data
ACK Polling
7025 FM 07
5