APPOTECH CW6632B, Руководство пользователя

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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(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 = SPI 1
Nbyte = Nunit * 2 = (SPI 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
X
Figure 10-1
X
)