Cypress FM4 Series - Extended Pin Function Setting Register 24 (EPFR24)

CHAPTER 12: I/O Port
704 FM4 Peripheral Manual, Doc. No. 002-04856 Rev. *E
4.32 Extended Pin Function Setting Register 24 (EPFR24)
The EPFR24 register assigns functions of I2S.
Register Configuration
bit
31
30
29
28
27
26
25
24
Field
Reserved
I2SM4_SDO1E
I2SM4_SDI1S
Attribute
-
R/W
R/W
Initial value
-
00
00
bit
23
22
21
20
19
18
17
16
Field
I2SM4_WS1B
I2SM4_SCK1B
I2SM4_MCLK1E
I2SM4_MCLK1S
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
Reserved
I2SM4_SDO0E
I2SM4_SDI0S
Attribute
-
R/W
R/W
Initial value
-
00
00
bit
7
6
5
4
3
2
1
0
Field
I2SM4_WS0B
I2SM4_SCK0B
I2SM4_MCLK0E
I2SM4_MCLK0S
Attribute
R/W
R/W
R/W
R/W
Initial value
00
00
00
00
Register Function
[bit31:28] Reserved: Reserved bits
0x0 is read from these bits.
When writing these bits, set them to 0x0.
[bit27:26] I2SM4_SDO1E: I2SDO1 Output Select bits
Selects output for I2SDO1.
bit
Description
Reading
Reads out the register value.
Writing
00
Does not produce output of I2S ch.1 I2SDO. [Initial value]
01
Uses I2SDO1_0 at the output pin of I2S ch.1 I2SDO.
10
Setting is prohibited.
11
Setting is prohibited.
[bit25:24] I2SM4_SDI1S: I2SDI1 Input Select bits
Selects input for I2SDI1.
bit
Description
Reading
Reads out the register value.
Writing
00
Does not produce input of I2S ch.1 I2SDI. [Initial value]
01
Uses I2SDI1_0 at the input pin of I2S ch.1 I2SDI.
10
Setting is prohibited.
11
Setting is prohibited.