h8s-2646 Renesas Electronics Corporation., h8s-2646 Datasheet - Page 1160

• Manufacturer Part Number: h8s-2646
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
• Manufacturer: Renesas Electronics Corporation.

Appendix E Timing of Transition to and Recovery from Hardware Standby Mode
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
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 to execute a power-on reset.
Rev. 5.00 Sep 22, 2005 page 1134 of 1136
REJ09B0257-0500
Appendix E Timing of Transition to and Recovery from
least 10 states before the STBY signal goes low, as shown below. RES must remain low until
STBY signal goes low (delay from STBY low to RES high: 0 ns or more).
do not need to be retained, RES does not have to be driven low as in (1).
STBY
RES
NMI
STBY
RES
Figure E.2 Timing of Recovery from Hardware Standby Mode
Figure E.1 Timing of Transition to Hardware Standby Mode
Hardware Standby Mode
t
1
10t
t 100ns
cyc
t
2
0ns
t
OSC
t
NMIRH