APPOTECH CW6632B, User Manual

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94 12.1 Features
CW6632B Bluetooth 3.0 Audio Player SOC Version 1.0.0
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12
SD Card Host Controller (SDC)
12.1
Features
The CW6632B SD card host controller can support SD/MMC card devices.

SD memory Card Spec
（
Ver2.0
）
/ MMC Spec
（
Ver4.3
）
compatible;
 CRC7 and CRC16 Generator;

Support Interrupt and DMA Data transfer mode;
 Support 1-bit or 4-bit data bus width;
12.2
IO Mapping
Table 12-1 shows the SDC IO Mapping
Table 12-1 IO mapping
BUS signals Port group 0 Port group 1
SDCLK SDCLK0
– P21
SDCLK0
– P3.0
SDCMD SDCMD0
– P20
SDCMD0
– P3.1
SDDAT0 SDDAT00
– P27
SDDAT00
– P3.2
SDDAT1 / SDDAT1
– P0.0
SDDAT2 / SDDAT2
– P0.1
SDDAT3 / SDDAT3
– P1.4
12.3
SDC Special Function Registers
Register 12-1 SDCON0
– SD host control register 0
Position 7 6 5 4 3 2 1 0
Name CKST DKST DW4 SDCKE SDE
Default 0 0 0 0 0 0 0 0
Access WO WO WO WO WO R/W R/W R/W
CKST : Command operation kicks start bits
000 = No operation
001 = Send command; receive 6-byte response, without check busy
011 = Send command; receive 17-byte response, without check busy
101 = Send command; receive 6-byte response, with check busy
111 = Send command; receive 17-byte response, with check busy
010 = Send command, without receive response, without check busy
100 = Send command, without receive response, with check busy
Others = Reserved