![Hitachi H8/3008 Hardware Manual Download Page 633](http://html.mh-extra.com/html/hitachi/h8-3008/h8-3008_hardware-manual_140473633.webp)
617
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 10
system clock cycles before the
STBY
signal goes low, as shown below.
RES
must remain low
until
STBY
goes low (minimum delay from
STBY
low to
RES
high: 0 ns).
t
1
≥
10t
cyc
t
2
≥
0 ns
STBY
RES
2. To retain RAM contents with the RAME bit cleared to 0 in SYSCR,
RES
does not have to be
driven low as in (1).
Timing of Recovery from Hardware Standby Mode: Drive the
RES
signal low approximately
100 ns before
STBY
goes high.
STBY
RES
t
≥
100 ns
t
OSC
Summary of Contents for H8/3008
Page 1: ...Hitachi 16 Bit Microcomputer H8 3008 Hardware Manual ADE 602 221 Rev 1 0 9 14 00 Hitachi Ltd ...
Page 4: ......
Page 17: ...xii ...
Page 70: ...54 ...
Page 114: ...98 ...
Page 154: ...138 ...
Page 314: ...298 ...
Page 412: ...396 ...
Page 496: ...480 ...