HD6433044 Hitachi Semiconductor, HD6433044 Datasheet - Page 244

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

Figure 8-18 shows the timing when the DMAC is activated by the falling edge of DREQ in block
transfer mode.
Figure 8-18 Timing of DMAC Activation by Falling Edge of DREQ in Block Transfer Mode
ø
DREQ
Address
bus
RD
HWR
TEND
,
LWR
T
1
T
2
T
1
DMAC cycle
T
2
T
1
T
2
End of 1 block transfer
230
T
1
T
2
T
1
Next sampling
Minimum 4 states
CPU cycle
T
2
T
1
T
2
T
d
DMAC cycle
T
1
T
2