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參數(shù)資料
| 型號(hào)： | MAX6885ETP+T |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 電源管理 |
| 英文描述： | EEPROM-Programmable, Hex, Power-Supply Supervisors with an ADC |
| 中文描述： | 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, QCC20 |
| 封裝： | 5 X 5 MM, 0.80 MM PITCH, MO-220WHHC, QFN-20 |
| 文件頁數(shù)： | 14/34頁 |
| 文件大?。?/td> | 402K |
| 代理商： | MAX6885ETP+T |
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The normal watchdog timeout period (tWD) is active
after the initial watchdog timer and continues to be
active until the watchdog timer expires. The normal
watchdog timeout period monitors a pulsed output of
the P that indicates when normal processor behavior
occurs. If no pulse occurs during the normal watchdog
timeout period, this indicates that the processor has
stopped operating or is stuck in an infinite execution
loop and WDO asserts. Disable or enable the watch-
dog timer through R15h[7].
If RESET is programmed to depend on WDO and the
watchdog timer expires, WDO will assert for a short
pulse, just long enough to assert RESET (typically less
than 5s; see Figure 4). If WDO is not programmed to
depend on RESET and the watchdog timer expires,
WDO will remain asserted until a low-to-high or high-to-
low edge occurs on WDI. Program WDO for open-drain
or weak pullup (see Table 8).
Fault Register
Registers 28h to 2Ah store all fault conditions including
undervoltage, overvoltage, and watchdog timer faults
(see Table 9). Fault registers are read-only and lose
contents upon power removal. The first read command
from the fault registers after power-up gives invalid
data. Reading the fault register clears all fault flags in
the register.
MAX6884/MAX6885
EEPROM-Programmable, Hex
Power-Supply Supervisory Circuits
______________________________________________________________________________________
21
REGISTER
ADDRESS
EEPROM
MEMORY
ADDRESS
BIT RANGE
DESCRIPTION
[0]
WDO Output Type
1 = Open Drain
0 = Weak Pullup
[3:1]
Initial Watchdog Timeout
000 = 6.25ms
001 = 25ms
010 = 100ms
011 = 400ms
100 = 1.6s
101 = 6.4ms
110 = 25.6s
111 = 102.4s
[6:4]
Normal Watchdog Timeout
000 = 6.25ms
001 = 25ms
010 = 100ms
011 = 400ms
1100 = 1.6s
101 = 6.4ms
110 = 25.6s
111 = 102.4s
15h
95h
[7]
Watchdog Enable
1 = Enabled
0 = Disabled
Table 8. Watchdog Register Settings
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MAX6884ETP+ | EEPROM-Programmable, Hex, Power-Supply Supervisors with an ADC |
| MAX6885ETP+ | EEPROM-Programmable, Hex, Power-Supply Supervisors with an ADC |
| MAX6886ETP+ | Pin-Selectable, Hex Power-Supply Supervisory Circuit |
| MAX6886ETP+T | Pin-Selectable, Hex Power-Supply Supervisory Circuit |
| MAX6887AETE+ | Hex/Quad, Power-Supply Supervisory Circuits |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX6886ETP | 功能描述:監(jiān)控電路 RoHS:否 制造商:STMicroelectronics 監(jiān)測(cè)電壓數(shù): 監(jiān)測(cè)電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開關(guān):No Backup 上電復(fù)位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| MAX6886ETP+ | 功能描述:監(jiān)控電路 Pin-Selectable Hex Power-Sup Supervisor RoHS:否 制造商:STMicroelectronics 監(jiān)測(cè)電壓數(shù): 監(jiān)測(cè)電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開關(guān):No Backup 上電復(fù)位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| MAX6886ETP+T | 功能描述:監(jiān)控電路 Pin-Selectable Hex Power-Sup Supervisor RoHS:否 制造商:STMicroelectronics 監(jiān)測(cè)電壓數(shù): 監(jiān)測(cè)電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開關(guān):No Backup 上電復(fù)位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| MAX6886ETP-T | 功能描述:監(jiān)控電路 RoHS:否 制造商:STMicroelectronics 監(jiān)測(cè)電壓數(shù): 監(jiān)測(cè)電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開關(guān):No Backup 上電復(fù)位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| MAX6887AETE | 功能描述:監(jiān)控電路 RoHS:否 制造商:STMicroelectronics 監(jiān)測(cè)電壓數(shù): 監(jiān)測(cè)電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開關(guān):No Backup 上電復(fù)位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
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