Cypress FM4 Series - Extended Pin Function Setting Register 00 (EPFR00)

CHAPTER 12: I/O Port
608 FM4 Peripheral Manual, Doc. No. 002-04856 Rev. *E
4.8 Extended Pin Function Setting Register 00 (EPFR00)
The EPFR00 register assigns functions to a pin if there is more than one function.
Register Configuration
bit
31
30
29
28
27
26
25
24
Field
Reserved
TRC3E
TRC2E
TRC1E
TRC0E
Attribute
-
R/W
R/W
R/W
R/W
Initial value
0
0
0
0
bit
23
22
21
20
19
18
17
16
Field
Reserved
JTAGEN1S
JTAGEN0B
Attribute
-
R/W
R/W
Initial value
1
1
bit
15
14
13
12
11
10
9
8
Field
Reserved
USBP1E
Reserved
USBP0E
Reserved
Attribute
-
R/W
-
R/W
-
Initial value
-
0
-
0
bit
7
6
5
4
3
2
1
0
Field
SUBOUTE
RTCCOE
Reserved
CROUTE
NMIS
Attribute
R/W
R/W
-
R/W
R/W
Initial value
00
00
00
0
Register Function
[bit31:28] Reserved: Reserved bits
0b0000 is read out from these bits.
When writing these bits, set them to 0b0000.
[bit27] TRC3E: TRACED Function Select bit 3
Selects a function for TRACED8 to TRACED15 pins.
This bit does not exist in TYPE1-M4, TYPE2-M4 and TYPE4-M4 products.
bit
Description
Reading
Reads out the register value.
Writing
0
Does not use eight pins of TRACED8 to TRACED15. [Initial value]
(A shared pin is available)
1
Uses two pins of TRACED8 to TRACED15.
[bit26] TRC2E: TRACED Function Select bit 2
Selects a function for TRACED4 to TRACED7 pins.
This bit does not exist in TYPE1-M4, TYPE2-M4 and TYPE4-M4 products.
bit
Description
Reading
Reads out the register value.
Writing
0
Does not use four pins of TRACED4 to TRACED7. [Initial value]
(A shared pin is available)
1
Uses two pins of TRACED4 to TRACED7.