參數(shù)資料
型號(hào)： MAX16046
廠商： Maxim Integrated Products, Inc.
英文描述： 12-Channel/8-Channel EEPROM-Programmable System Managers with Nonvolatile Fault Registers
中文描述： 12/8通道EEPROM可編程系統(tǒng)管理器，提供非易失故障寄存器
文件頁(yè)數(shù)： 43/68頁(yè)
文件大?。?/td> 570K
代理商： MAX16046
M
Watchdog Timer
The watchdog timer can operate together with or inde-
pendently of the MAX16046/MAX16048. When operat-
ing in dependent mode, the watchdog is not activated
until the sequencing is complete and
RESET
is de-
asserted. When operating in independent mode, the
watchdog timer is independent of the sequencing oper-
ation and activates immediately after V
CC
exceeds the
UVLO threshold and the boot phase is complete. Set
r4Dh[3] to ‘0’ to configure the watchdog in dependent
mode. Set r4Dh[3] to ‘1’ to configure the watchdog in
independent mode. See Table 28 for more information
on configuring the watchdog timer in dependent or
independent mode.
Dependent Watchdog Timer Operation
The watchdog timer can be used to monitor μP activity
in two modes. Flexible timeout architecture provides an
adjustable watchdog startup delay of up to 128s, allow-
ing complicated systems to complete lengthy boot-up
routines. An adjustable watchdog timeout allows the
supervisor to provide quick alerts when processor
activity fails. After each reset event (V
CC
drops below
UVLO then returns above UVLO, software reboot, man-
ual reset (
MR
), EN input going low then high, or watch-
dog reset) and once sequencing is complete, the
watchdog startup delay provides an extended time for
the system to power up and fully initialize all μP and
system components before assuming responsibility for
routine watchdog updates. Set r55h[6] to ‘1’ to enable
the watchdog startup delay. Set r55h[6] to ‘0’ to disable
the watchdog startup delay.
The normal watchdog timeout period, t
WDI
, begins after
the first transition on WDI before the conclusion of the
long startup watchdog period, t
WDI_STARTUP
(Figures 6
and 7). During the normal operating mode, WDO
asserts if the μP does not toggle WDI with a valid transi-
tion (high-to-low or low-to-high) within the standard
timeout period, t
WDI
. WDO remains asserted until WDI
is toggled or
RESET
is asserted (Figure 7).
While EN is low, or r55h[7] is a ‘0,’ the watchdog timer is
in reset. The watchdog timer does not begin counting until
the power-on mode is reached and
RESET
is deasserted.
The watchdog timer is reset and WDO deasserts any time
RESET
is asserted (Figure 8). The watchdog timer will be
held in reset while
RESET
is asserted.
The watchdog can be configured to control the
RESET
output as well as the WDO output.
RESET
is pulsed low
for the reset timeout, t
RP
, when the watchdog timer
expires and the Watchdog Reset Output Enable bit
(r55h[7]) is set to ‘1.’ Therefore, WDO pulses low for a
short time (approximately 1μs) when the watchdog timer
expires.
RESET
is not affected by the watchdog timer
when the
RESET
Output Enable bit (r55h[7]) is set to ‘0.’
See Table 29 for more information on configuring
watchdog functionality.
*MAX16046 only
Table 27.
RESET
Configuration and Dependencies (continued)
REGISTER/
EEPROM
ADDRESS
BIT RANGE
DESCRIPTION
[0]
RESET
DEPENDENCIES
1 =
RESET
is dependent on MON1
[1]
[2]
[3]
[4]
[5]
[6]
[7]
[0]
[1]
[2]
[3]
[7:4]
1 =
RESET
is dependent on MON2
1 =
RESET
is dependent on MON3
1 =
RESET
is dependent on MON4
1 =
RESET
is dependent on MON5
1 =
RESET
is dependent on MON6
1 =
RESET
is dependent on MON7
1 =
RESET
is dependent on MON8
1 =
RESET
is dependent on MON9*
1 =
RESET
is dependent on MON10*
1 =
RESET
is dependent on MON11*
1 =
RESET
is dependent on MON12*
Reserved
1Ah
1Bh
12-Channel/8-Channel EEPROM-Programmable
System Managers with Nonvolatile Fault Registers
______________________________________________________________________________________
43
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參數(shù)描述
MAX16046ACB+ 功能描述:監(jiān)控電路 12Ch EEPROM Prob System Manager 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(guò)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
MAX16046ACB+T 功能描述:監(jiān)控電路 12Ch EEPROM Prob System Manager 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(guò)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
MAX16046ATN+ 功能描述:監(jiān)控電路 12Ch EEPROM Prob System Manager 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(guò)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
MAX16046ATN+T 功能描述:監(jiān)控電路 12Ch EEPROM Prob System Manager 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(guò)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
MAX16046ECB+ 功能描述:監(jiān)控電路 12Ch EEPROM Prob System Manager 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(guò)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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