84 10.1 SPI0
CW6632B Bluetooth 3.0 Audio Player SOC Version 1.0.0
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10 SPI
10.1 SPI0
SPI0 can serve as master or slave. It can operate in normal or DMA mode.
SPI0 map to three group ports configured by PWKEDGE[6] and SPICON[3]:
Group0 – P27, P25, P26;
Group1 – P04, P06, P05;
Group2 – P14, P00, P34.
Group3 – P30(P40), P31, P32
When PWKEDGE[6]=0 and SPI0CON.3 = 0, Group0 actived
2wire mode: P2.6 as SPI0CLK0, P2.7 as SPI0DIDO0;
3wire mode: P2.6 as SPI0CLK0, P2.7 as SPI0DO2, P2.5 as SPI0DI0.
When PWKEDGE[6]=0 and SPI0CON.3 = 1, Group1 actived
2wire mode: P0.5 as SPI0CLK1, P0.4 as SPI0DIDO1;
3wire mode: P0.5 as SPI0CLK1, P0.4 as SPI0DO1, P0.6 as SPI0DI1.
When PWKEDGE[6]=1 and SPI0CON.3 = 0 Group2 actived
2wire mode: P3.4 as SPI0CLK2, P1.4 as SPI0DIDO2;
3wire mode: P3.4 as SPI0CLK2, P1.4 as SPI0DO2, P0.0 as SPI0DI2.
When PWKEDGE[6]=1 and SPI0CON.3 = 1, Grop3 actived
2wire mode: P3.0 as SPI0CLK3, P3.2 as SPI0DIDO3;
3wire mode: P3.0 as SPI0CLK3, P3.2 as SPI0DO3, P3.1 as SPI0DI3.
when PMUXCON0[5] = 1 P4.0 as SPI0CLK3
3 41 2 8765
SPICLK CYCLE #
MSB 6 5 4 3 2 1 LSB
MSB 6 5 4 3 2 1 LSB
SPICLK
(SPIIDST = 0)
SPICLK
(SPIIDST = 1)
SAMPLE INPUT
DATA OUT
(SPIEDGE = 0)
SAMPLE INPUT
DATA OUT
(SPIEDGE = 1)
Figure 10-1 SPI timing
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