HD6433308 HITACHI [Hitachi Semiconductor], HD6433308 Datasheet - Page 347

• Manufacturer Part Number: HD6433308
• Description: Hitachi Single-Chip MicroComputer
• Manufacturer: HITACHI [Hitachi Semiconductor]

Timing of Transition to Hardware Standby Mode
(1). To retain RAM contents, drive the RES signal low 10 system clock cycles before the STBY
(2). When it is not necessary to retain RAM contents, RES does not have to be driven low as in
Timing of Recovery From Hardware Standby Mode: Drive the RES signal low approximately
100 ns before STBY goes high.
STBY
RES
Appendix D. Timing of Transition to and Recovery From
STBY
RES
signal goes low, as shown below. RES must remain low until STBY goes low (minimum delay
from STBY low to RES high: 0 ns).
(1).
Hardware Standby Mode
t
1
10 t
t = 100 ns
cyc
339
t
2
0 ns
t
OSC