PD17012_15 Datasheet, PDF (286/320 Pages) Renesas Technology Corp – 4-BIT SINGLE-CHIP MICROCONTROLLERS WITH DIGITAL TUNING SYSTEM HARDWARE

µPD17012, 17P012
Figure 22-11. Operation of BTM0CY Flag
(a) When BTM0CY flag never detected (SKT1 BTM0CY or SKF1 BTM0CY is not executed)
VDD
CE
Basic timer 0 carry
FF setting pulse
BTM0CY
Operation in
Figure 22-10
5V
0V
H
L
H
L
H
L
<1> <2> <6>
<3>
<5>
<8>
<6>
<7>
Timer time
changed
(b) When detecting power failure by BTM0CY flag
<5> <4> <9>
<6>
<7>
STOP
0000 B
5V
VDD
0V
H
CE
L
Basic timer 0 carry ^H
FF setting pulse _L
H
BTM0CY
SKTI instruction ^L
Operation in
<1> <2> <6><14> <13>
<16>
<14>
Figure 22-10
<3>
<11>
BTM0CY = 0
Power failure
Timer time
changed
<15>
BTM0CY = 1
No power failure
<13>
<12> <17>
<14>
STOP
0000 B
<15>
BTM0CY = 1
No power failure
<1>
<1>
284
Data Sheet U10101EJ4V0DS