HD6433044 Hitachi Semiconductor, HD6433044 Datasheet - Page 250

• Manufacturer Part Number: HD6433044
• Description: (HD64 Series) Hitachi Single-Chip Microcomputer
• Manufacturer: Hitachi Semiconductor

8.4.14 DMAC States in Reset State, Standby Modes, and Sleep Mode
When the chip is reset or enters hardware or software standby mode, the DMAC is initialized and
halts. DMAC operations continue in sleep mode. Figure 8-24 shows the timing of a cycle-steal
transfer in sleep mode.
ø
Address bus
RD
HWR LWR
,
CPU cycle
T
Figure 8-24 Timing of Cycle-Steal Transfer in Sleep Mode
2
T
d
T
DMAC cycle
1
T
2
T
1
T
2
236
Sleep mode
T
d
T
DMAC cycle
1
T
2
T
1
T
2
T
d