HD6412240 RENESAS [Renesas Technology Corp], HD6412240 Datasheet - Page 811

• Manufacturer Part Number: HD6412240
• Description: Renesas 16-Bit Single-Chip Microcomputer H8S Family / H8S/2200 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

Timing of Transition to Hardware Standby Mode
(1) To retain RAM contents with the RAME bit set to 1 in SYSCR, drive the RES signal low at
(2) To retain RAM contents with the RAME bit cleared to 0 in SYSCR, or when RAM contents do
Timing of Recovery from Hardware Standby Mode
Drive the RES signal low and the NMI signal high approximately 100 ns or more before STBY
goes high, and execute a power-on reset.
least 10 states before the STBY signal goes low, as shown figure F.1. RES must remain low
until STBY goes low (delay from STBY fall to RES rise: minimum 0 ns).
not need to be retained, RES does not have to be driven low as in (1).
STBY
RES
NMI
Appendix F Timing of Transition to and Recovery from
STBY
RES
Figure F.2 Timing of Recovery from Hardware Standby Mode
Figure F.1 Timing of Transition to Hardware Standby Mode
Appendix F Timing of Transition to and Recovery from Hardware Standby Mode
Hardware Standby Mode
t
t
1
100 ns
10 t
cyc
t
2
Rev.3.00 Mar. 26, 2007 Page 769 of 772
t
0 ns
OSC
t
NMIRH
REJ09B0355-0300