Cypress FM4 Series - Extended Pin Function Setting Register 09 (EPFR09)

CHAPTER 12: I/O Port
FM4 Peripheral Manual, Doc. No. 002-04856 Rev. *E 645
4.17 Extended Pin Function Setting Register 09 (EPFR09)
The EPFR09 register assigns functions to CAN, ADC trigger, and QPRC peripheral pins.
Register Configuration
bit
31
30
29
28
27
26
25
24
Field
CTX1E
CRX1S
CTX0E
CRX0S
Attribute
R/W
R/W
R/W
R/W
Initial value
00
00
00
00
bit
23
22
21
20
19
18
17
16
Field
ADTRG2S
ADTRG1S
Attribute
R/W
R/W
Initial value
0000
0000
bit
15
14
13
12
11
10
9
8
Field
ADTRG0S
QZIN1S
QBIN1S
Attribute
R/W
R/W
R/W
Initial value
0000
00
00
bit
7
6
5
4
3
2
1
0
Field
QAIN1S
QZIN0S
QBIN0S
QAIN0S
Attribute
R/W
R/W
R/W
R/W
Initial value
00
00
00
00
Register Function
[bit31:30] CTX1E: CTX1E Output Select bits
Selects output for CAN TX1.
bit
Description
Reading
Reads out the register value.
Writing
00
Does not produce output for CAN ch.1 TX. [Initial value]
01
Sets the output pin of CAN ch.1 TX to TX1_0.
10
Sets the output pin of CAN ch.1 TX to TX1_1.
11
Sets the output pin of CAN ch.1 TX to TX1_2.
[bit29:28] CRX1S: CRX1S Input Select bits
Selects input for CAN RX1.
bit
Description
Reading
Reads out the register value.
Writing
00
Sets the input pin of CAN ch.1 RX to RX1_0. [Initial value]
01
Same as Writing 00.
10
Sets the input pin of CAN ch.1 RX to RX1_1.
11
Sets the input pin of CAN ch.1 RX to RX1_2.