HD6433044 Hitachi Semiconductor, HD6433044 Datasheet - Page 862
HD6433044
Manufacturer Part Number
HD6433044
Description
(HD64 Series) Hitachi Single-Chip Microcomputer
Manufacturer
Hitachi Semiconductor
Datasheet
1.HD6433044.pdf
(867 pages)
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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
(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 approximately
100 ns before STBY goes high.
STBY
RES
STBY
RES
Appendix E Timing of Transition to and Recovery from
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).
do not need to be retained, RES does not have to be driven low as in (1).
Hardware Standby Mode
t
1
t
10t
100 ns
cyc
855
t
2
0 ns
t
OSC
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