UPD17015 Datasheet, PDF (103/120 Pages) NEC – 4-BIT SINGLE-CHIP MICROCONTROLLER FOR PORTABLE RADIOS

µPD17015
Fig. 15-9 BTM0CY Flag Operation
5
(a) When BTM0CY flag not detected even once (neither SKT1 BTM0CY nor SKF1 BTM0CY executed)
3.0V
V_DD
0V
H
CE
L
BTM0CY flag ^H
set pulse
L
H
BTM0CY
L
Fig. 15-8 operation
1
2
6
5
8
6
5
4
9
6
1
3
7
7
STOP 0000B
(b) When power failure detected with BTM0CY flag
3.0V
V_DD
0V
H
CE
L
BTM0CY flag ^H
set pulse _L
H
BTM0CY
L
SKT1 instruction
Fig. 15-8 operation
1
2 6 14
13
3 11
BTM0CY=0
Power failure
16
14
13
12 17
14
1
15
BTM0CY=1
No power failure
15
STOP 0000B
BTM0CY=1
No power failure
103