Cypress FM4 Series - Extended Pin Function Setting Register 18 (EPFR18)

CHAPTER 12: I/O Port
688 FM4 Peripheral Manual, Doc. No. 002-04856 Rev. *E
4.26 Extended Pin Function Setting Register 18 (EPFR18)
The EPFR18 register assigns functions of QPRC and SD Card IF and HDMI-CEC peripheral pins.
Register Configuration
bit
31
30
29
28
27
26
25
24
Field
Reserved
SDWPS
SDCDS
SDDATA3B
Attribute
-
R/W
R/W
R/W
Initial value
-
00
00
00
bit
23
22
21
20
19
18
17
16
Field
SDDATA2B
SDDATA1B
SDDATA0B
SDCMDB
Attribute
R/W
R/W
R/W
R/W
Initial value
00
00
00
00
bit
15
14
13
12
11
10
9
8
Field
SDCLKE
Reserved
QZIN3S
Attribute
R/W
-
R/W
Initial value
00
-
00
bit
7
6
5
4
3
2
1
0
Field
QBIN3S
QAIN3S
CECR1B
CECR0B
Attribute
R/W
R/W
R/W
R/W
Initial value
00
00
00
00
Register Function
[bit31:30] Reserved: Reserved bits
0x00 is read from these bits.
When writing these bits, set them to 0x00.
[bit29:28] SDWPS: S_WP input select bits
Selects input for S_WP.
bit
Description
Reading
Reads out the register value.
Writing
00
Uses S_WP_0 at the input pin of SD CARD IF. [Initial value]
01
Uses S_WP_0 at the input pin of SD CARD IF. (Same as witting 00.)
10
Setting is prohibited.
11
Setting is prohibited.
[bit27:26]SDCDS: S_CD input select bits
Selects input for S_CD.
bit
Description
Reading
Reads out the register value.
Writing
00
Uses S_CD_0 at the input pin of SD CARD IF. [Initial value]
01
Uses S_CD_0 at the input pin of SD CARD IF. (Same as witting 00.)
10
Setting is prohibited.
11
Setting is prohibited.