參數(shù)資料
型號(hào): UPD75008
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): 23/66頁
文件大小: 542K
代理商: UPD75008
μ
PD75004, 75006, 75008
23
5.4
BASIC INTERVAL TIMER
The basic interval timer has these functions:
Interval timer operation which generates a reference time interrupt
Watchdog timer application which detects a program runaway
Selects the wait time for releasing the standby mode and counts the wait time
Reads out the count value
Remarks : *: Instruction execution
Fig. 5-3 Basic Interval Timer Configuration
From the
clock generator
f
X
/2
5
f
X
/2
7
f
X
/2
9
f
X
/2
12
MPX
Clear
Basic interval timer
(8-bit frequency divider circuit)
3
4
8
BT
Clear
Set
signal
BT
interrupt
request flag
IRQBT
Wait release signal
for standby release
Vector
interrupt
request
signal
Internal bus
BTM3
BTM2
BTM1
BTM0
BTM
SET1*
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