Rainbow-electronics W90P710CDG Manual de usuario descargar pdf (Pagina 244)

100

101

W90P710CD/W90P710CDG

- 244 -

SD Interface Control Register (SDICR)

SDICR

0xFFF0_7300

R/W

SD Interface Control Register

0x0000_0000

31 30 29 28 27 26 25 24

Reserved

23 22 21 20 19 18 17 16

Reserved

15 14 13 12 11 10 9 8

SD_CS

Reserved

CMD_CODE

7 6 5 4 3 2 1 0

CLK_KEEP

8CLK_OE

74CLK_OE

R2_EN DO_EN DI_EN RI_EN CO_EN

BITS DESCRIPTIONS

[31:16]

Reserved

[15]

SD_CS

SD Card Select Control

0=Select SD card-0

1=Select SD card-1

It is fixed to 0 at W90P710

[13:8]

CMD_CODE

SD Command Code

This register contains the SD command code (00H – 3FH).

[7]

CLK_KEEP

SD Clock Enable

0=Disable SD clock generation

1=SD clock always keeps free running.

[6]

8CLK_OE

8 Clock Cycles Output Enable

0=Disable

1=Enable, SD host controller output 8 clock cycles

When the operation is finished, this bit is automatically cleared to “0”

by H/W circuit.

1 2 ... 239 240 241 242 243 244 245 246 247 248 249 ... 551 552

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Rainbow-electronics W90P710CDG Manual de usuario Pagina 244

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