Rainbow Electronics AT91CAP9S250A - Manual (Page 330)

330
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