General-Purpose Input/Output (GPIO)
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SPRUI07–March 2020
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System Control and Interrupts
Table 1-50. GPIO Port A Multiplexing 1 (GPAMUX1) Register Field Descriptions (continued)
Bits Field Value Description
(1)
5-4 GPIO2 Configure the GPIO2 pin as:
00 GPIO2 (I/O) General purpose I/O 2 (default) (I/O)
01 EPWM2A - ePWM2 output A (O)
10 Reserved.
(2)
11 Reserved.
(2)
3-2 GPIO1 Configure the GPIO1 pin as:
00 GPIO1 - General purpose I/O 1 (default) (I/O)
01 EPWM1B - ePWM1 output B (O)
10 ECAP6 - eCAP6 (I/O)
11 MFSRB - McBSP-B Receive Frame Synch (I/O)
1-0 GPIO0 Configure the GPIO0 pin as:
00 GPIO0 - General purpose I/O 0 (default) (I/O)
01 EPWM1A - ePWM1 output A (O)
10 Reserved.
(2)
11 Reserved.
(2)
Figure 1-48. GPIO Port A MUX 2 (GPAMUX2) Register
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
GPIO31 GPIO30 GPIO29 GPIO28 GPIO27 GPIO26 GPIO25 GPIO24
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
GPIO23 GPIO22 GPIO21 GPIO20 GPIO19 GPIO18 GPIO17 GPIO16
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
LEGEND: R/W = Read/Write; R = Read only; -n = value after reset
(1)
This register is EALLOW protected. See Section 1.5.2 for more information.
Table 1-51. GPIO Port A MUX 2 (GPAMUX2) Register Field Descriptions
Bits Field Value Description
(1)
31-30 GPIO31 Configure the GPIO31 pin as:
00 GPIO31 - General purpose I/O 31 (default) (I/O)
01 CANTXA - eCAN-A transmit (O)
10 or 11 XA17 - External interface address line 17 (O)
29-28 GPIO30 Configure the GPIO30 pin as:
00 GPIO30 (I/O) General purpose I/O 30 (default) (I/O)
01 CANRXA - eCAN-A receive (I)
10 or 11 XA18 - External interface address line 18
27-26 GPIO29 Configure the GPIO29 pin as:
00 GPIO29 (I/O) General purpose I/O 29 (default) (I/O)
01 SCITXDA - SCI-A transmit. (O)
10 or 11 XA19 - External Interface address line 19 (O)
25-24 GPIO28 Configure the GPIO28 pin as:
00 GPIO28 (I/O) General purpose I/O 28 (default) (I/O)
01 SCIRXDA - SCI-A receive (I)
10 or 11 XZCS6 - External interface zone 6 chip select (O)
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