18 dmac channel x [x = 0 ] configuration register – Rainbow Electronics AT91CAP9S250A User Manual
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6264A–CAP–21-May-07
AT91CAP9S500A/AT91CAP9S250A
26.5.18
DMAC Channel x [x = 0..3] Configuration Register
Name: DMAC_CFGx [x = 0..3]
Access: Read/Write
Reset Value: 0x0100000000
• SRC_PER
Channel x Source Request is associated with peripheral identifier coded SRC_PER handshaking interface.
• DST_PER
Channel x Destination Request is associated with peripheral identifier coded DST_PER handshaking interface.
• SRC_REP
0: When automatic mode is activated, source address is contiguous between two buffers.
1: When automatic mode is activated, the source address and the control register are reloaded from previous transfer.
• SRC_H2SEL
0: Software handshaking interface is used to trigger a transfer request.
1: Hardware handshaking interface is used to trigger a transfer request.
• DST_REP
0: When automatic mode is activated, destination address is contiguous between two buffers.
1: When automatic mode is activated, the destination and the control register are reloaded from the previous transfer.
• DST_H2SEL
0: Software handshaking interface is used to trigger a transfer request.
1: Hardware handshaking interface is used to trigger a transfer request.
• SOD
0: STOP ON DONE disabled, the descriptor fetch operation ignores DONE Field of CTRLA register.
1: STOP ON DONE activated, the DMAC module is automatically disabled if DONE FIELD is set to 1.
• LOCK_IF
0: Interface Lock capability is disabled
1: Interface Lock capability is enabled
• LOCK_B
31
30
29
28
27
26
25
24
–
–
–
–
–
AHB_PROT
23
22
21
20
19
18
17
16
–
LOCK_IF_L
LOCK_B
LOCK_IF
–
–
–
SOD
15
14
13
12
11
10
9
8
–
–
DST_H2SEL
DST_REP
–
–
SRC_H2SEL
SRC_REP
7
6
5
4
3
2
1
0
DST_PER
SRC_PER