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Section 13 Direct Memory Access Controller (DMAC)
Rev. 4.00 Sep. 14, 2005 Page 443 of 982
REJ09B0023-0400
To execute a longword access to an 8-bit or 16-bit external device or to execute a word access to
an 8-bit external device, the
DACK
and
TEND
outputs are divided for data alignment as shown in
figure 13.18.
CKIO
Address
DACKn
TENDn
WAIT
CSn
T
1
T
2
T
aw
T
1
T
2
(Active low)
(Active low)
Note:
TEND
is asserted for the last transfer unit of DMA transfers.
If a transfer unit is divided into multiple bus cycles and
if
CSn
is negated during the bus cycle,
TEND
is also divided.
RD
D15 to D0
WEn
D15 to D0
Read
Write
Figure 13.18 BSC Ordinary Memory Access
(No Wait, Idle Cycle 1, Longword Access to 16-Bit Device)
Содержание HD6417641
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Страница 454: ...Section 12 Bus State Controller BSC Rev 4 00 Sep 14 2005 Page 404 of 982 REJ09B0023 0400...
Страница 500: ...Section 13 Direct Memory Access Controller DMAC Rev 4 00 Sep 14 2005 Page 450 of 982 REJ09B0023 0400...
Страница 504: ...Section 14 U Memory Rev 4 00 Sep 14 2005 Page 454 of 982 REJ09B0023 0400...
Страница 566: ...Section 17 Compare Match Timer CMT Rev 4 00 Sep 14 2005 Page 516 of 982 REJ09B0023 0400...
Страница 734: ...Section 18 Multi Function Timer Pulse Unit MTU Rev 4 00 Sep 14 2005 Page 684 of 982 REJ09B0023 0400...
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Страница 1016: ...Section 25 Electrical Characteristics Rev 4 00 Sep 14 2005 Page 966 of 982 REJ09B0023 0400...
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