PIC32MX440F256H-80I Datasheet, PDF (518/646 Pages) Microchip Technology – 64/100-Pin General Purpose and USB 32-Bit Flash Microcontrollers

PIC32MX3XX/4XX
22.6 I/O Pin Control
The pins used for analog input can also be used for dig-
ital I/O. Configuring a pin for analog input requires three
steps. Any digital peripherals that share the desired pin
must be disabled. The pin must be configured as a dig-
ital input, by setting the corresponding TRIS bit to a ‘1’
to disable the output driver. Then, the pin must be
placed in Analog mode by setting the corresponding bit
in the AD1PCFG register.
TABLE 22-3:
Pin Name
PINS ASSOCIATED WITH THE ADC MODULE
Module
Control
Controlling Bit Field
Pin
Type
Buffer
Type
TRIS
AN0
ON
AD1PCFG<0>
A
AN1
ON
AD1PCFG<1>
A
AN2
ON
AD1PCFG<2>
A
AN3
ON
AD1PCFG<3>
A
AN4
ON
AD1PCFG<4>
A
AN5
ON
AD1PCFG<5>
A
AN6
ON
AD1PCFG<6>
A
AN7
ON
AD1PCFG<7>
A
AN8
ON
AD1PCFG<8>
A
AN9
ON
AD1PCFG<9>
A
AN10
ON
AD1PCFG<10>
A
AN11
ON
AD1PCFG<11>
A
AN12
ON
AD1PCFG<12>
A
AN13
ON
AD1PCFG<13>
A
AN14
ON
AD1PCFG<14>
A
AN15
ON
AD1PCFG<15>
A
VREF+
ON
AD1CON2<15:13>
P
VREF-
ON
AD1CON2<15:13>
P
Legend: ST = Schmitt Trigger input with CMOS levels
I = Input
O = Output
—
Input
—
Input
—
Input
—
Input
—
Input
—
Input
—
Input
—
Input
—
Input
—
Input
—
Input
—
Input
—
Input
—
Input
—
Input
—
Input
—
—
—
—
A = Analog
P = Power
Description
Analog Input
Analog Input
Analog Input
Analog Input
Analog Input
Analog Input
Analog Input
Analog Input
Analog Input
Analog Input
Analog Input
Analog Input
Analog Input
Analog Input
Analog Input
Analog Input
Positive Voltage Reference
Negative Voltage Reference
DS61143E-page 516
Preliminary
© 2008 Microchip Technology Inc.