Cypress FM4 Series - Page 689

CHAPTER 12: I/O Port
FM4 Peripheral Manual, Doc. No. 002-04856 Rev. *E 689
[bit25:24] SDDATA3B: SDDATA3 input/output select bits
Selects input/output for S_DATA3.
bit
Description
Reading
Reads out the register value.
Writing
00
Uses S_DATA3_0 at the input pin of SD CARD IF. [Initial value]
Does not produce output.
01
Uses S_DATA3_0 at the input pin of SD CARD IF.
Uses S_DATA3_0 at the output pin.
10
Setting is prohibited.
11
Setting is prohibited.
[bit23:22] SDDATA2B: SDDATA2 input/output select bits
Selects input/output for S_DATA2.
bit
Description
Reading
Reads out the register value.
Writing
00
Uses S_DATA2_0 at the input pin of SD CARD IF. [Initial value]
Does not produce output.
01
Uses S_DATA2_0 at the input pin of SD CARD IF.
Uses S_DATA2_0 at the output pin.
10
Setting is prohibited.
11
Setting is prohibited.
[bit21:20] SDDATA1B: SDDATA1 input/output select bits
Selects input/output for S_DATA1.
bit
Description
Reading
Reads out the register value.
Writing
00
Uses S_DATA1_0 at the input pin of SD CARD IF. [Initial value]
Does not produce output.
01
Uses S_DATA1_0 at the input pin of SD CARD IF.
Uses S_DATA1_0 at the output pin.
10
Setting is prohibited.
11
Setting is prohibited.
[bit19:18] SDDATA0B: SDDATA0 input/output select bits
Selects input/output for S_DATA0.
bit
Description
Reading
Reads out the register value.
Writing
00
Uses S_DATA0_0 at the input pin of SD CARD IF. [Initial value]
Does not produce output.
01
Uses S_DATA0_0 at the input pin of SD CARD IF.
Uses S_DATA0_0 at the output pin.
10
Setting is prohibited.
11
Setting is prohibited.