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參數(shù)資料
| 型號： | X46402 |
| 元件分類： | CPU監(jiān)測 |
| 英文描述： | RTC Module With CPU Supervisor |
| 中文描述： | 時鐘模塊CPU監(jiān)控 |
| 文件頁數(shù)： | 9/23頁 |
| 文件大?。?/td> | 102K |
| 代理商： | X46402 |
X46402
Preliminary Information
9
Figure 9. Definition of Start and Stop Conditions
Acknowledge
Acknowledge is a software convention used to indicate
successful data transfer. The transmitting device, either
master or slave, will release the bus after transmitting
eight bits. During the ninth clock cycle the receiver will
pull the SDA line LOW to acknowledge that it received
the eight bits of data.
The X46402 will respond with an acknowledge after rec-
ognition of a start condition and its slave address. If both
the device and a write condition have been selected, the
X46402 will respond with an acknowledge after the
receipt of each subsequent eight-bit word.
Read Device ID Command
A special, non-password protected command reads the
device ID. The device ID is a 32 bit identification code
that can be generic or tailored to the needs of an individ-
ual company. The last of the 32 bits indicates whether
the device has been tampered with by an unauthorized
user attempting to enter invalid passwords.
Reset Device Command
The Reset Device command resets the tamper bit, clears
the tamper counter and removes the tamper “l(fā)ock”
(allowing the device to accept commands). However, the
Reset Device command does not clear any memory
array area.
SCL
SDA
Start Condition
Stop Condition
Table 3. X46402 Instruction Set
Notes:
Illegal command codes will be disregarded. The part will respond with a “no-ACK” to the illegal byte and then return to the standby mode.
1st Byte
after Start
1000 0000
1000 1000
1001 0000
1001 1000
1010 0000
1010 1000
1011 0000
1011 1000
1100 0000
1100 1000
1101 1000
1110 1000
1111 0000
1st Byte
after
Password
High Address
High Address
High Address
High Address
0000 0000
0000 0000
0000 0000
0000 0000
0000 0000
High Address
High Address
not used
not used
All the rest
2nd Byte
after
Password
Low address
Low address
Low address
Low address
0000 0000
0000 0000
0000 0000
0000 0000
0000 0000
Low address
Low address
not used
not used
Command Description
Password Memory Array Read
OTP Read
Password Memory Array Write
OTP Write
Change Memory Read Password
Change OTP Read Password
Change Memory Write Password
Change OTP Write Password
Change Reset Password
No-Password Memory Array Read
No-Password Memory Array Write
Reset Device Command (Resets Tamper bit)
ACK Polling command (Ends Password operation)
Reserved
Password used
Memory Read
OTP Read
Memory Write
OTP Write
Memory Read
OTP Read
Memory Write
OTP Write
Reset
None
None
Reset
None
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| X46402V8-2.9 | RTC Module With CPU Supervisor |
| X46402V8-3.1 | RTC Module With CPU Supervisor |
| X46402V8-3.1A | RTC Module With CPU Supervisor |
| X46402V8E-2.9 | RTC Module With CPU Supervisor |
| X46402V8E-3.1 | RTC Module With CPU Supervisor |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| X46402V8-2.9 | 制造商:XICOR 制造商全稱:Xicor Inc. 功能描述:Dual Voltage CPU Supervisor with 64K Password Protected EEPROM |
| X46402V8-3.1 | 制造商:XICOR 制造商全稱:Xicor Inc. 功能描述:Dual Voltage CPU Supervisor with 64K Password Protected EEPROM |
| X46402V8-3.1A | 制造商:XICOR 制造商全稱:Xicor Inc. 功能描述:Dual Voltage CPU Supervisor with 64K Password Protected EEPROM |
| X46402V8E-2.9 | 制造商:XICOR 制造商全稱:Xicor Inc. 功能描述:Dual Voltage CPU Supervisor with 64K Password Protected EEPROM |
| X46402V8E-3.1 | 制造商:XICOR 制造商全稱:Xicor Inc. 功能描述:Dual Voltage CPU Supervisor with 64K Password Protected EEPROM |
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