Rev. 2.00, 09/03, page 270 of 690
CKIO
Address
Data
RD
DACKn
WAIT
CSn
T1 T2
Taw T1 T2
TEND0
Note: TEND0 is asserted during the last transfer unit of
DMA transfer. When the transfer unit is divided into
several bus cycles and
CS
is negated between bus
cycles, TEND0 is also divided.
Figure 8.18 BSC Ordinary Memory Access
(No Wait, Idle Cycle 1, Longword Access to 16-Bit Device)
8.5
Precautions
8.5.1
Precautions when Mixing Cycle-Steal Mode Channels and Burst Mode Channels
Transfer mode settings should not fulfill conditions (1) and (2) below at the same time.
(1) DMA transfer takes place using multiple channels, some of which operate in the burst mode
and some in the cycle-steal mode.
(2) A channel that uses the burst mode is set to dual address mode and DACK is output using the
write cycle.
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