參數(shù)資料
型號(hào): uPD750066CUA
廠商: NEC Corp.
英文描述: 4-BIT SINGLE-CHIP MICROCONTROLLERS
中文描述: 4位單晶片微控制器
文件頁數(shù): 27/82頁
文件大小: 460K
代理商: UPD750066CUA
27
μ
PD750064, 750066, 750068, 750064(A), 750066(A), 750068(A)
Data Sheet U10165EJ2V0DS00
6.5 Basic Interval Timer/Watchdog Timer
The basic interval timer/watchdog timer has the following functions.
(a) Interval timer operation to generate a reference time interrupt
(b) Watchdog timer operation to detect a runaway of program and reset the CPU
(c) Selects and counts the wait time when the standby mode is released
(d) Reads the contents of counting
Figure 6-4. Basic Interval Timer/Watchdog Timer Block Diagram
From clock
generator
f
X
/2
5
f
X
/2
7
f
X
/2
9
f
X
/2
12
MPX
BTM3 BTM2 BTM1 BTM0 BTM
4
SET1
Note
Internal bus
8
1
Basic interval timer
(8-bit frequency divider)
Clear
BT
Wait release signal
when standby is
released
Set
Clear
3
WDTM
SET1
Note
Internal reset
signal
Vectored
interrupt
request
signal
BT
interrupt
request flag
IRQBT
Note
Instruction execution
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