µ
PD75512
22
6.4
BASIC INTERVAL TIMER
The
µ
PD75512 is provided with the 8-bit 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
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*
*: Instruction execution
Fig. 6-3 Basic Interval Timer Configuration
Содержание mPD75512
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