X46402V8-3.1 XICOR [Xicor Inc.], X46402V8-3.1 Datasheet - Page 14
X46402V8-3.1
Manufacturer Part Number
X46402V8-3.1
Description
Dual Voltage CPU Supervisor with 64K Password Protected EEPROM
Manufacturer
XICOR [Xicor Inc.]
Datasheet
1.X46402V8-3.1.pdf
(23 pages)
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X46402
Figure 15. Non-Password Protected Random Read
Figure 16. Non-Password Protected Sequential Read
Figure 17. Change Passwords
SDA
Password Matches
SDA
S
If ACK, then
SDA
No-Password
COMMAND
S
S
No-Password
COMMAND
COMMAND
*
ACK for correct password, No ACK for incorrect password
S
Password
ACK POLLING
COMMAND
New
0
Password
Old
7
Password
New
7
Two bytes of “0”
14
Data 0
Password
Password
Old
0
New
0
Data 0
S
Preliminary Information
*
Password
Data ACK
S
New
Polling
ACK Polling
Command
Wait t
Repeated
7
OR
If immediate ACK,
then New Password error
If immediate NACK,
followed by ACK after ~5ms
then New Password OK
WC
Data 0
Data X
S
S
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