PIC32MX440F256H-80I Datasheet, PDF (25/646 Pages) Microchip Technology – 64/100-Pin General Purpose and USB 32-Bit Flash Microcontrollers

PIC32MX3XX/4XX
TABLE 1-4:
Function
PIC32MX3XX/4XX PINOUT DESCRIPTIONS – GENERAL PURPOSE (CONTINUED)
Pin Number
64-pin 100-pin
I/O
Input
Buffer
Description
U1CTS
43
47
I
ST UART1 Clear to Send Input
U1RTS
35
48
O
— UART1 Request to Send Output
U1RX
34
52
I
ST UART1 Receive
U1TX
33
51
O
— ^{UART1 Transmit Output}
U2CTS
21
40
I
ST UART2 Clear to Send Input
U2RTS
29
39
O
— UART2 Request to Send Output
U2RX
31
49
I
ST UART 2 Receive Input
U2TX
32
50
O
— UART2 Transmit Output
VDD
10, 26, 38 2, 16, 37, P
46, 62
— Positive Supply for Peripheral Digital Logic and I/O pins
VDDCAP
56
85
P
— External Filter Capacitor Connection (regulator enabled)
VDDCORE
56
85
P
— Positive Supply for Microcontroller Core Logic (regulator disabled)
VREF-
15
28
I
ANA A/D Reference Voltage (Low) Input
VREF+
16
29
I
ANA A/D Reference Voltage (High) Input
VSS
9, 25, 41 15, 36,
P
45, 65, 75
— Ground Reference for Logic and I/O pins
Legend:
Note:
TTL = TTL input buffer
ANA = Analog level input/output
ST = Schmitt Trigger input buffer
I²C™ = I²C/SMBus input buffer
In some cases, I/O pins are multiplexed with more than one peripheral. In general, the dominant output control of a
multiplexed I/O pin can be determined by the order of the peripheral output names assigned to a pin (read from left to
right). Multiplexed peripheral inputs have no priority.
© 2008 Microchip Technology Inc.
Preliminary
DS61143E-page 23