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參數(shù)資料
| 型號： | X46402V8-3.1A |
| 元件分類： | CPU監(jiān)測 |
| 英文描述： | RTC Module With CPU Supervisor |
| 中文描述： | 時(shí)鐘模塊CPU監(jiān)控 |
| 文件頁數(shù)： | 11/23頁 |
| 文件大?。?/td> | 102K |
| 代理商： | X46402V8-3.1A |
X46402
Preliminary Information
11
ACK Polling
Once a stop condition is issued to indicate the end of the
host’s write sequence, the X46402 initiates the internal
nonvolatile write cycle. In order to take advantage of the
typical 5ms write cycle, ACK polling can begin immedi-
ately. This involves issuing the start condition followed by
the new command code of 8 bits (1st byte of the protocol.)
If the X46402 is still busy with the nonvolatile write opera-
tion, it will issue a “no-ACK” in response. If the nonvolatile
write operation has completed, an “ACK” will be returned
and the host can then proceed with the rest of the proto-
col. See Figure 12.
After the password sequence, there is always a nonvolatile
write cycle. This is done to discourage random guesses of
the password if the device is being tampered with. In order
to continue the transaction, the X46402 requires the mas-
ter to perform an ACK polling with the specific code of
F0h. As with regular Acknowledge polling the user can
either time out for 10ms, and then issue the ACK polling
once, or continuously loop as described in the flow.
If the password that was inserted was correct, then an
“ACK” will be returned once the nonvolatile cycle is over, in
response to the ACK polling cycle immediately following it.
If the password that was inserted was incorrect, then a “no
ACK” will be returned even if the nonvolatile cycle is over.
Therefore, the user cannot be certain that the password is
incorrect until the 10ms write cycle time has elapsed.
Data ACK Polling Sequence
ACK
RETURNED
ISSUE NEW
COMMAND
CODE
WRITE SEQUENCE
COMPLETED
ENTER ACK POLLING
ISSUE START
NO
YES
PROCEED
Password ACK Polling Sequence
ACK
RETURNED
ISSUE
PASSWORD
ACK COMMAND
PASSWORD LOAD
COMPLETED
ENTER ACK POLLING
ISSUE START
NO
YES
PROCEED
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| X46402V8E-2.9 | RTC Module With CPU Supervisor |
| X46402V8E-3.1 | RTC Module With CPU Supervisor |
| X46402V8E-3.1A | RTC Module With CPU Supervisor |
| X4643 | CPU Supervisor with 64K EEPROM |
| X4645 | CPU Supervisor with 64K EEPROM |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 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 |
| X46402V8E-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 |
| X4643 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:CPU Supervidor with 64K EEPROM |
| X4643S8 | 功能描述:IC CPU SUPRV 64K EE RST LO 8SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - 監(jiān)控器 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 類型:簡單復(fù)位/加電復(fù)位 監(jiān)視電壓數(shù)目:1 輸出:開路漏極或開路集電極 復(fù)位:低有效 復(fù)位超時(shí):標(biāo)準(zhǔn)傳輸延遲為 60 µs 電壓 - 閥值:3V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SC-74A，SOT-753 供應(yīng)商設(shè)備封裝:SOT-23-5 包裝:Digi-Reel® 其它名稱:LM8364BALMF30DKR |
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