UPD17073 NEC, UPD17073 Datasheet - Page 203

• Manufacturer Part Number: UPD17073
• Description: 4-BIT SINGLE-CHIP MICROCONTROLLER WITH HARDWARE FOR DIGITAL TUNING SYSTEM
• Manufacturer: NEC

BTM0CY flag
Example
Operation example
setting pulse
Program example
START:
;<1>
;<2>
BACKUP:
;<3>
INITIAL:
;<4>
MAIN:
V
CE
DD
3 V
0 V
BANK1
SKT1
BR
BR
SKT1
BR
BR
H
H
L
L
Processing at reset
Watch updating
Initial processing
Main processing
Watch updating
BTM0CY
INITIAL
MAIN
BTM0CY
MAIN
MAIN
125 ms
If total processing time of < 1 > +
< 4 > is 125 ms or longer, CE reset
is effected in the middle of
processing.
< 1 >
< 2 > Power failure detection
125 ms
; Power failure detection
; Program address 0000H
< 4 >
CE reset
If total processing time of
< 1 > + < 3 > is too long,
CE reset is effected.
< 1 >
< 2 > Power failure detection
< 3 >
PD17072,17073
CE reset
203