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| 型号： | MAX16048ETN+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 45/70页 |
| 文件大小： | 0K |
| 描述： | IC EE-PROG SYS MGR 8CH 56-TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 37 |
| 类型： | 系统管理器 |
| 监视电压数目： | 8 |
| 输出： | 开路漏极，推挽式 |
| 复位： | 低有效 |
| 复位超时： | 可调节/可选择 |
| 电压 - 阀值： | 可调节/可选择 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 56-WFQFN 裸露焊盘 |
| 供应商设备封装： | 56-TQFN-EP（8x8） |
| 包装： | 管件 |
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MAX16046/MAX16048
12-Channel/8-Channel EEPROM-Programmable
System Managers with Nonvolatile Fault Registers
Table 27. RESET Configuration and Dependencies (continued)
REGISTER/
EEPROM
ADDRESS
1Ah
1Bh
*MAX16046 only
BIT RANGE
[0]
[1]
[2]
[3]
[4]
[5]
[6]
[7]
[0]
[1]
[2]
[3]
[7:4]
RESET DEPENDENCIES
1 = RESET is dependent on MON1
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
DESCRIPTION
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
Maxim Integrated
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 Watchdog Reset Output Enable bit (r55h[7]) is
set to ‘0.’
See Table 29 for more information on configuring
watchdog functionality.
45
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX16048ETN+ | 功能描述:监控电路 8Ch EEPROM Prob System Manager RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
| MAX16048ETN+T | 功能描述:监控电路 8Ch EEPROM Prob System Manager RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
| MAX16049ACB+ | 功能描述:监控电路 8Ch EEPROM Prob System Manager RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
| MAX16049ACB+T | 功能描述:监控电路 8Ch EEPROM Prob System Manager RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
| MAX16049ATN+ | 功能描述:监控电路 8Ch EEPROM Prob System Manager RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
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