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参数资料
| 型号： | SMS64FR01 |
| 厂商： | Summit Microelectronics, Inc. |
| 英文描述： | Six-Channel Supply Monitor and Sequencing Controller |
| 中文描述： | 6通道电源监视器和排序控制器 |
| 文件页数： | 14/24页 |
| 文件大小： | 647K |
| 代理商： | SMS64FR01 |
SMS64
Preliminary
Summit Microelectronics, Inc
2060 2.22 10/09/03
14
WATCHDOG AND LONGDOG TIMERS
The SMS64 contains two timers that can be
programmed independently. The Watchdog timer will
generate an interrupt if it times out. The Longdog timer
will generally be programmed to be of longer duration
than the Watchdog timer and will generate a reset if it
times out. Both timers are cleared by a low to high
transition on WLDI and start simultaneously.
If the Longdog times out RST_A# and RST_B# will
be driven low either until a WLDI clear is received or
until t
PRTO
(whichever occurs first), at which time they
will return high. When RST_A# and RST_B# return
high both timers are reset to time zero. Therefore, if
the Longdog t
PLDTO
is shorter than the Watchdog
t
PWDTO
, RST_A# and RST_B# will effectively clear the
interrupt before it can drive the output low
If WLDI is held low the timers will free-run
generating a series of interrupts and resets. If WLDI is
held high the interrupt (Watchdog) output will be
disabled and only the reset (Longdog) outputs will be
active.
Refer to Figure 6 which illustrates the action of
RST_A#, RST_B# and IRQ# with respect to the
Watchdog and Longdog timers and the WLDI input.
t
PRTO
t
PLDTO
t0
t0
t
PWDTO
t0
t0
t0
t0
t
PLDTO
t
PRTO
RST_A#
RST_B#
IRQ#
WLDI
Figure 6. Watchdog, Longdog and WLDI Timing Diagram
APPLICATIONS INFORMATION (CONTINUED)
相关PDF资料 |
PDF描述 |
|---|---|
| SMS64FR02 | Six-Channel Supply Monitor and Sequencing Controller |
| SMS64FR03 | Six-Channel Supply Monitor and Sequencing Controller |
| SMS64FR04 | Six-Channel Supply Monitor and Sequencing Controller |
| SMS64FR05 | Six-Channel Supply Monitor and Sequencing Controller |
| SMS64FR06 | Six-Channel Supply Monitor and Sequencing Controller |
相关代理商/技术参数 |
参数描述 |
|---|---|
| SMS64FR02 | 制造商:SUMMIT 制造商全称:SUMMIT 功能描述:Six-Channel Supply Monitor and Sequencing Controller |
| SMS64FR03 | 制造商:SUMMIT 制造商全称:SUMMIT 功能描述:Six-Channel Supply Monitor and Sequencing Controller |
| SMS64FR04 | 制造商:SUMMIT 制造商全称:SUMMIT 功能描述:Six-Channel Supply Monitor and Sequencing Controller |
| SMS64FR05 | 制造商:SUMMIT 制造商全称:SUMMIT 功能描述:Six-Channel Supply Monitor and Sequencing Controller |
| SMS64FR06 | 制造商:SUMMIT 制造商全称:SUMMIT 功能描述:Six-Channel Supply Monitor and Sequencing Controller |
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