R01UH0092EJ0110 Rev.1.10
Page 245 of 807
Jul 31, 2012
M16C/64C Group
16. DMAC
Figure 16.2
Source Read Cycle Example
BCLK
Address
bus
RD signal
WR signal
Data bus
CPU use
CPU use
Source
Dummy
cycle
BCLK
Address
bus
RD signal
WR signal
Data bus
CPU used
CPU used
Source
Dummy
cycle
1
Note:
1. The same timing changes occur with the respective conditions at the destination as at the source.
BCLK
Address
bus
RD signal
WR signal
Data bus
CPU used
CPU used
Source
Dummy
cycle
1
BCLK
Address
bus
RD signal
WR signal
Data bus
CPU used
CPU used
Source
Dummy
cycle
Destination
Destination
Destination
Destination
(1) Transfers are performed in 8-bit or 16-bit units, and the transfer source is an even address.
(4) Conditions listed in (2) with one wait inserted in the source read cycle.
(2) Transfers are performed in 16-bit units, and the transfer source is an odd address.
(3) Conditions listed in (1) with one wait inserted in the source read cycle.
CPU use
CPU use
Source
Destination
Dummy
cycle
CPU used
CPU used
Source
Destination
Dummy
cycle
1
CPU used
CPU used
Source
Dummy
cycle
Destination
CPU use
CPU use
Source
Dummy
cycle
1
Destination
Содержание M16C Series
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