HD6417641 RENESAS [Renesas Technology Corp], HD6417641 Datasheet - Page 462

• Manufacturer Part Number: HD6417641
• Manufacturer: RENESAS [Renesas Technology Corp]

Section 13 Direct Memory Access Controller (DMAC)
Rev. 4.00 Sep. 14, 2005 Page 412 of 982
REJ09B0023-0400
Bit
13
12
11
10
9
8
Bit Name
SM1
SM0
RS3
RS2
RS1
RS0
Initial
Value
0
0
0
0
0
0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Descriptions
Source Address Mode
SM1 and SM0 select whether the DMA source address
is incremented, decremented, or left fixed. (In single
address mode, SM1 and SM0 bits are ignored when
data is transferred from an external device with
DACK.)
00: Fixed source address (Setting prohibited in 16-byte
01: Source address is incremented (+1 in 8-bit transfer,
10: Source address is decremented (–1 in 8-bit
11: Reserved (Setting prohibited)
Resource Select
RS3 to RS0 specify which transfer requests will be
sent to the DMAC. The changing of transfer request
source should be done in the state that DMA enable bit
(DE) is set to 0.
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
Note: External request specification is valid only in
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
transfer)
+2 in 16-bit transfer, +4 in 32-bit transfer, +16 in
16-byte transfer)
transfer, –2 in 16-bit transfer, –4 in 32-bit transfer;
illegal setting in 16-byte transfer)
CHCR_0 and CHCR_1. None of the request
sources can be selected in channels CHCR_2
and CHCR_3.
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
External request, dual address mode
Reserved (Setting prohibited)
External request/Single address mode
External address space → external device with DACK
External request/Single address mode
External device with DACK → external address space
Auto request
Reserved (Setting prohibited)
Reserved (Setting prohibited)
Reserved (Setting prohibited)
DMA expansion request module selection specification
Reserved (Setting prohibited)
Reserved (Setting prohibited)
Reserved (Setting prohibited)
Reserved (Setting prohibited)
Reserved (Setting prohibited)
A/D converter 0
CMT0