Cypress FM4 Series - Page 690

CHAPTER 12: I/O Port
690 FM4 Peripheral Manual, Doc. No. 002-04856 Rev. *E
[bit17:16] SDCMDB: S_CMD input/output select bits
Selects input/output for S_CMD.
bit
Description
Reading
Reads out the register value.
Writing
00
Uses S_CMD_0 at the input pin of SD CARD IF. [Initial value]
Does not produce output.
01
Uses S_CMD_0 at the input pin of SD CARD IF.
Uses S_CMD_0 at the output pin.
10
Setting is prohibited.
11
Setting is prohibited.
[bit15:14] SDCLKE: S_CLK output select bits
Selects output for S_CLK.
bit
Description
Reading
Reads out the register value.
Writing
00
Does not produce output S_CLK_0 of SD CARD IF. [Initial value]
01
Uses S_CLK_0 at the output pin of SD CARD IF.
10
Setting is prohibited.
11
Setting is prohibited.
[bit13:10] Reserved: Reserved bits
0b0000 is read from these bits.
When writing these bits, set them to 0b0000.
[bit9:8] QZIN3S: QDU-ch3 ZIN input select bits
Selects input for QDU-ch3 ZIN.
bit
Description
Reading
Reads out the register value.
Writing
00
Uses ZIN3_0 at the input pin of ZIN of QDU-ch.3. [Initial value]
01
Uses ZIN3_0 at the input pin of ZIN of QDU-ch.3. (Same as writing 00.)
10
Uses ZIN3_1 at the input pin of ZIN of QDU-ch.3.
11
Uses ZIN3_2 at the input pin of ZIN of QDU-ch.3.
[bit7:6] QBIN3S: QDU-ch3 BIN input select bits
Selects input for QDU-ch3 BIN.
bit
Description
Reading
Reads out the register value.
Writing
00
Uses BIN3_0 at the input pin of BIN of QDU-ch.3. [Initial value]
01
Uses BIN3_0 at the input pin of BIN of QDU-ch.3. (Same as writing 00.)
10
Uses BIN3_1 at the input pin of BIN of QDU-ch.3.
11
Uses BIN3_2 at the input pin of BIN of QDU-ch.3.