HD6417144 RENESAS [Renesas Technology Corp], HD6417144 Datasheet - Page 220
HD6417144
Manufacturer Part Number
HD6417144
Description
32-Bit RISC Microcomputer SuperHTM RISC engine Family/SH7144 Series
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
1.HD6417144.pdf
(930 pages)
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10. Direct Memory Access Controller (DMAC)
Bit
6
5
4
3
2
Rev.4.00 Mar. 27, 2008 Page 176 of 882
REJ09B0108-0400
Bit Name
DS
TM
TS1
TS0
IE
Initial Value
0
0
0
0
0
R/W
(R/W)*
R/W
R/W
R/W
R/W
2
Description
DREQ Select
Sets the sampling method for the DREQ pin in
external request mode to either low-level detection or
falling-edge detection. This bit is valid only with
CHCR_0 and CHCR_1. For CHCR_2 and CHCR_3,
this bit is always read as 0 and the write value should
always be 0.
Even with channels 0 and 1, when specifying an on-
chip peripheral module or auto-request as the transfer
request source, this bit setting is ignored. The
sampling method is fixed at falling-edge detection in
cases other than auto-request.
0: Low-level detection
1: Falling-edge detection
Transfer Mode
Specifies the bus mode for data transfer.
0: Cycle steal mode
1: Burst mode
Transfer Size 1, 0
Specify size of data for transfer.
00: Specifies byte size (8 bits)
01: Specifies word size (16 bits)
10: Specifies longword size (32 bits)
11: Prohibited
Interrupt Enable
When this bit is set to 1, interrupt requests are
generated after the number of data transfers
specified in the DMATCR (when TE = 1).
0: Interrupt request not generated after DMATCR-
1: Interrupt request enabled on completion of
specified transfer count
DMATCR specified number of transfers
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