Cypress FM4 Series - Extended Pin Function Setting Register 07 (EPFR07)

CHAPTER 12: I/O Port
636 FM4 Peripheral Manual, Doc. No. 002-04856 Rev. *E
4.15 Extended Pin Function Setting Register 07 (EPFR07)
The EPFR07 register assigns functions of multi-function serial ch.0 to ch.3.
Register Configuration
bit
31
30
29
28
27
26
25
24
Field
Reserved
SCK3B
SOT3B
Attribute
-
R/W
R/W
Initial value
-
00
00
bit
23
22
21
20
19
18
17
16
Field
SIN3S
SCK2B
SOT2B
SIN2S
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
SCK1B
SOT1B
SIN1S
SCK0B
Attribute
R/W
R/W
R/W
R/W
Initial value
00
00
00
00
bit
7
6
5
4
3
2
1
0
Field
SOT0B
SIN0S
Reserved
Attribute
R/W
R/W
-
Initial value
00
00
-
Register Function
[bit31:28] Reserved: Reserved bits
0b0000 is read from these bits.
When writing these bits, set them to 0b0000.
[bit27:26] SCK3B: SCK3 Input/Output Select bits
Selects input/output for SCK3.
bit
Description
Reading
Reads out the register value.
Writing
00
Uses SCK3_0 at the input pin of MFS ch.3 SCK.
Does not produce output. [Initial value]
01
Uses SCK3_0 at the input pin of MFS ch.3 SCK.
Uses SCK3_0 at the output pin.
10
Uses SCK3_1 at the input pin of MFS ch.3 SCK.
Uses SCK3_1 at the output pin.
11
Uses SCK3_2 at the input pin of MFS ch.3 SCK.
Uses SCK3_2 at the output pin.