X76F400 Datasheet, PDF (6/14 Pages) IC MICROSYSTEMS – Secure SerialFlash

X76F400
Figure 4. Sector Write Sequence (Password Required)
Host
Commands
X76F400
Response
SDA S
Write
Command
If ACK, then
Password Matches
Host
Commands
Password ACK
Command
S
Write
Password
7
X76F400
Response
Figure 5. Acknowledge Polling
SCL
8^th CLK of
8^th
Pwd. Byte
‘ACK’
CLK
SDA
‘ACK’
START
Condition
Figure 6. Sector Read Sequence (Password Required)
Host
Commands
X76F400
Response
SDA _S
Read
Command
If ACK, then
Password Matches
Host
Commands
Password ACK
Command
S
X76F400
Response
Read
Password
7
Data 0
Write
Password
0
Wait tWC OR
Password
ACK
Command
P
Wait t_WC
ACK Polling
Data
8^th
CLK
8^th Bit
‘ACK’
CLK
ACK or
No ACK
Read
Password
0
Wait tWC OR
Password
ACK
Command
P
Data n
REV 1.0 7/5/00
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