x46402 Intersil Corporation, x46402 Datasheet - Page 14

• Manufacturer Part Number: x46402
• Description: Dual Voltage Cpu Supervisor With 64k Password Protected Eeprom
• Manufacturer: Intersil Corporation

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