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S3C2440A RISC MICROPROCESSOR USB DEVICE
13-21
DMA FIFO COUNTER REGISTER (EPN_DMA_FIFO)
This register has values in byte size in FIFO to be transferred by DMA. In case of OUT_DMA_RUN enabled, the
value in OUT FIFO Write Count Register1 will be loaded in this register automatically. In case of IN DMA mode,
the MCU should set proper value by software.
Register Address R/W Description Reset Value
EP1_DMA_FIFO 0x52000208(L)
0x5200020B(B)
R/W
(byte)
EP1 DMA transfer FIFO counter base register 0x00
EP2_DMA_FIFO 0x52000220(L)
0x52000223(B)
R/W
(byte)
EP2 DMA transfer FIFO counter base register 0x00
EP3_DMA_FIFO 0x52000248(L)
0x5200024B(B)
R/W
(byte)
EP3 DMA transfer FIFO counter base register 0x00
EP4_DMA_FIFO 0x52000260(L)
0x52000263(B)
R/W
(byte)
EP4 DMA transfer FIFO counter base register 0x00
DMA_FIFO Bit MCU USB Description Initial State
EPn_FIFO_CNT [7:0] R/W R EP DMA transfer FIFO counter value 0x00