APPOTECH CW6632B - 12 SD Card Host Controller (SDC); Features; IO Mapping; SDC Special Function Registers

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