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SPI S3C2440A RISC MICROPROCESSOR
22-6
SPI SPECIAL REGISTERS
SPI CONTROL REGISTER
Register Address R/W Description Reset Value
SPCON0 0x59000000 R/W SPI channel 0 control register 0x00
SPCON1 0x59000020 R/W SPI channel 1 control register 0x00
SPCONn Bit Description Initial State
SPI Mode Select
(SMOD)
[6:5] Determine how SPTDAT is read/written
00 = polling mode 01 = interrupt mode
10 = DMA mode 11 = reserved
00
SCK Enable
(ENSCK)
[4] Determine whether you want SCK enabled or not (master only).
0 = disable 1 = enable
0
Master/Slave
Select (MSTR)
[3] Determine the desired mode (master or slave).
0 = slave 1 = master
Note: In slave mode, there should be set up time for master to
initiate Tx/Rx.
0
Clock Polarity
Select (CPOL)
[2] Determine an active high or active low clock.
0 = active high 1 = active low
0
Clock Phase
Select (CPHA)
[1] Select one of the two fundamentally different transfer format
0 = format A 1 = format B
0
Tx Auto Garbage
Data mode enable
(TAGD)
[0] Decide whether the receiving data is required or not.
0 = normal mode 1 = Tx auto garbage data mode
Note: In normal mode, if you only want to receive data, you should
transmit dummy 0xFF data.
0