Samsung SC32442B54, Руководство пользователя

Страница: 244 / 647

DMA SC32442B RISC MICROPROCESSOR
8-8
DMA INITIAL DESTINATION (DIDST) REGISTER
Register Address R/W Description Reset Value
DIDST0 0x4B000008 R/W DMA 0 initial destination register 0x00000000
DIDST1 0x4B000048 R/W DMA 1 initial destination register 0x00000000
DIDST2 0x4B000088 R/W DMA 2 initial destination register 0x00000000
DIDST3 0x4B0000B8 R/W DMA 3 initial destination register 0x00000000
DIDSTn Bit Description Initial State
D_ADDR [30:0] Base address (start address) of destination for the transfer. This bit
value will be loaded into CURR_SRC only if the CURR_DST is 0 and
the DMA ACK is 1. 0x00000000
DMA INITIAL DESTINATION CONTROL (DIDSTC) REGISTER
Register Address R/W Description Reset Value
DIDSTC0 0x4B00000C R/W DMA 0 initial destination control register 0x00000000
DIDSTC1 0x4B00004C R/W DMA 1 initial destination control register 0x00000000
DIDSTC2 0x4B00008C R/W DMA 2 initial destination control register 0x00000000
DIDSTC3 0x4B0000CC R/W DMA 3 initial destination control register 0x00000000
DIDSTCn Bit Description Initial State
CHK_INT [2] Select interrupt occurrence time when auto reload is setting.
0 : Interrupt will occur when TC reaches 0.
1 : Interrupt will occur after auto-reload is performed.
0
LOC [1] Bit 1 is used to select the location of destination.
0: the destination is in the system bus (AHB).
1: the destination is in the peripheral bus (APB).
0
INC [0] Bit 0 is used to select the address increment.
0 = Increment 1= Fixed
If it is 0, the address is increased by its data size after each transfer in
burst and single transfer mode.
If it is 1, the address is not changed after the transfer. (In the burst
mode, address is increased during the burst transfer, but the address is
recovered to its first value after the transfer.)
0