APPOTECH CW6632B - SPI0 Operation Guide

86 10.1 SPI0
CW6632B Bluetooth 3.0 Audio Player SOC Version 1.0.0
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Position
7
6
5
4
3
2
1
0
Name
SPIBAUD
Default
x
x
x
x
x
x
x
x
Access
WO
WO
WO
WO
WO
WO
WO
WO
Baud rate = F
system_clock
/ [2(SPIBAUD+1)]
Register 10-3 SPI0BUF – SPI0 Data Buffer
Position
7
6
5
4
3
2
1
0
Name
SPI0BUF
Default
x
x
x
x
x
x
x
X
Access
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Register 10-4 SPIDMACNT – SPI0 DMA counter
Position
7
6
5
4
3
2
1
0
Name
SPIDMACNT
Default
x
x
x
x
x
x
x
x
Access
WO
WO
WO
WO
WO
WO
WO
WO
Nunit = SPIDMACNT + 1
Nbyte = Nunit * 2 = (SPIDMACNT + 1) * 2
Register 10-5 SPIDMAPTRH– SPI0 DMA Start Pointer high byte
Position
7
6
5
4
3
2
1
0
Name
SPIDMAPTRH
Default
x
x
x
x
x
x
x
x
Access
WO
WO
WO
WO
WO
WO
WO
WO
Register 10-6 SPIDMAPTRL– SPI0 DMA Start Pointer low byte
Position
7
6
5
4
3
2
1
0
Name
SPIDMAPTRL
Default
x
x
x
x
x
x
x
x
Access
WO
WO
WO
WO
WO
WO
WO
WO
10.1.2 SPI0 Operation Guide
When SPI0CON1.1=0,
SPI0 Normal Mode Operation Flow:
1. Set IO in the correct direction.
2. Select SPI0RT in 2-wire mode if 2-wire mode is selected
3. Select master mode or slave mode
4. Configure clock frequency when master mode is selected in step 3
5. Select one of the four timing mode (refer to XFigure 10-1X)