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 m ode,
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 trans fer FIFO counter value 0x00