参数资料
型号: MB90F462APMC
厂商: FUJITSU LTD
元件分类: 微控制器/微处理器
英文描述: 16-BIT, FLASH, 16 MHz, MICROCONTROLLER, PQFP64
封装: 12 X 12 MM, 1.70 MM HEIGHT, 0.65 MM PITCH, PLASTIC, LFQFP-64
文件页数: 31/88页
文件大小: 2202K
代理商: MB90F462APMC
MB90460/465 Series
DS07-13714-2E
37
4.
Watchdog Timer
The watchdog timer is a 2-bit counter that uses the timebase timer’s supply clock as the count clock. After
activation, if the watchdog timer is not cleared within a given period, the CPU will be reset.
Features of Watchdog Timer :
Reset CPU at four different time intervals
Status bits to indicate the reset causes
Block Diagram
PONR STBR WRST ERST SRST WTE
WT1
WT0
× 21 × 22
× 28 × 29 × 210 × 211 × 212 × 213 × 214 × 215 × 216 × 217 × 218
2
4
Counter
clear control
circuit
Count
clock
selector
2-bit
counter
Watchdog
reset generator
One-half of HCLK
Watchdog timer control register (WDTC)
Watchdog timer
Activation
with CLR
To the
internal
reset
generator
CLR
Clear
(Timebase timer counter)
Over-
flow
Start of sleep mode
Start of hold status mode
Start of stop mode
HCLK : Oscillation clock
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