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General-Purpose Input/Output (GPIO)
117
SPRUI07–March 2020
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System Control and Interrupts
Figure 1-55. GPIO Port A Qualification Select 1 (GPAQSEL1) Register
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
GPIO15 GPIO14 GPIO13 GPIO12 GPIO11 GPIO10 GPIO9 GPIO8
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
GPIO7 GPIO6 GPIO5 GPIO4 GPIO3 GPIO2 GPIO1 GPIO0
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 1-58. GPIO Port A Qualification Select 1 (GPAQSEL1) Register Field Descriptions
Bits Field Value Description
(1)
31-0 GPIO15-GPIO0 Select input qualification type for GPIO0 to GPIO15. The input qualification of each GPIO
input is controlled by two bits as shown in Figure 1-55.
00 Synchronize to SYSCLKOUT only. Valid for both peripheral and GPIO pins.
01 Qualification using 3 samples. Valid for pins configured as GPIO or a peripheral function.
The time between samples is specified in the GPACTRL register.
10 Qualification using 6 samples. Valid for pins configured as GPIO or a peripheral function.
The time between samples is specified in the GPACTRL register.
11 Asynchronous. (no synchronization or qualification). This option applies to pins configured
as peripherals only. If the pin is configured as a GPIO input, then this option is the same as
0,0 or synchronize to SYSCLKOUT.
Figure 1-56. GPIO Port A Qualification Select 2 (GPAQSEL2) 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 1-59. GPIO Port A Qualification Select 2 (GPAQSEL2) Register Field Descriptions
Bits Field Value Description
(1)
31-0 GPIO31-GPIO16 Select input qualification type for GPIO16 to GPIO31. The input qualification of each GPIO
input is controlled by two bits as shown in Figure 1-56.
00 Synchronize to SYSCLKOUT only. Valid for both peripheral and GPIO pins.
01 Qualification using 3 samples. Valid for pins configured as GPIO or a peripheral function. The
time between samples is specified in the GPACTRL register.
10 Qualification using 6 samples. Valid for pins configured as GPIO or a peripheral function. The
time between samples is specified in the GPACTRL register.
11 Asynchronous. (no synchronization or qualification). This option applies to pins configured as
peripherals only. If the pin is configured as a GPIO input, then this option is the same as 0,0
or synchronize to SYSCLKOUT.
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