SLAU723A October 2017 – October 2018 MSP432E401Y , MSP432E411Y
GPIO Analog Mode Select (GPIOAMSEL)
NOTE
This register is only valid for ports and pins that can be used as ADC AINx inputs.
If any pin is to be used as an ADC input, the appropriate bit in GPIOAMSEL must be set to disable the analog isolation circuit.
The GPIOAMSEL register controls isolation circuits to the analog side of a unified I/O pad. Because the GPIOs may be driven by a 3.3 -V source and affect analog operation, analog circuitry requires isolation from the pins when they are not used in their analog function.
Each bit of this register controls the isolation circuitry for the corresponding GPIO signal. For information on which GPIO pins can be used for ADC functions, refer to .
GPIOAMSEL is shown in Figure 17-25 and described in Table 17-31.
Return to Summary Table.
| 31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 | 23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 |
| RESERVED | |||||||||||||||
| R-0x0 | |||||||||||||||
| 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
| RESERVED | GPIOAMSEL | ||||||||||||||
| R-0x0 | R/W-0x0 | ||||||||||||||