HD6417144 RENESAS [Renesas Technology Corp], HD6417144 Datasheet - Page 218
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)
Rev.4.00 Mar. 27, 2008 Page 174 of 882
REJ09B0108-0400
Bit
13
12
Bit Name
SM1
SM0
Initial Value
0
0
R/W
R/W
R/W
Description
Source Address Mode 1, 0
These bits specify increment/decrement of the DMA
transfer source address. These bit specifications are
ignored when transferring data from an external
device to address space in single address mode.
00: Source address fixed
01: Source address incremented (+1 during 8-bit
10: Source address decremented (–1 during 8-bit
11: Setting prohibited
When the transfer source is specified at an indirect
address, specify in source address register 3
(SAR_3) the actual storage address of the data you
want to transfer as the data storage address (indirect
address).
During indirect address mode, SAR_3 obeys the
SM1/SM0 setting for increment/decrement. In this
case, SAR_3’s increment/decrement is fixed at +4/–4
or 0, irrespective of the transfer data size specified
by TS1 and TS0.
transfer, +2 during 16-bit transfer, +4 during 32-bit
transfer)
transfer, –2 during 16-bit transfer, –4 during 32-
bit transfer)
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