參數(shù)資料
型號: UPD75064CU
廠商: NEC Corp.
英文描述: 4-BIT SINGLE-CHIP MICROCOMPUTER
中文描述: 4位單片機(jī)
文件頁數(shù): 21/68頁
文件大小: 640K
代理商: UPD75064CU
21
μ
PD75064, 75066, 75068, 75064(A), 75066(A), 75068(A)
5.4 Basic Interval Timer
The basic interval timer has these functions:
Interval timer operation which generates a reference timer interrupt
Watchdog timer application which detects a program runaway
Selection of wait time for releasing the standby mode and counting the wait time
Reading out the count value
Figure 5-3. Basic Interval Timer Configuration
Note
Instruction execution
From the clock
generator
f
X
/2
5
Internal bus
4
f
X
/2
7
f
X
/2
9
f
X
/2
12
MPX
Basic interval timer
(8-bit frequency divider circuit)
Clear signal
Clear signal
BT interrupt
request flag
Vectored
interrupt
request
signal
IRQBT
Wait release
signal for standby
release
Set
signal
BT
8
BTM3
BTM2
BTM1
BTM0
BTM
SET1
Note
3
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