LPC4088 datasheet(10/123 Pages) NXP

10 / 123 page

LPC408X_7X

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Objective data sheet

Rev. 1 — 17 September 2012

10 of 123

NXP Semiconductors

LPC408x/7x

32-bit ARM Cortex-M4 microcontroller

6.2 Pin description

I/O pins on the LPC408x/7x are 5V tolerant and have input hysteresis unless otherwise

indicated in the table below. Crystal pins, power pins, and reference voltage pins are not

5V tolerant. In addition, when pins are selected to be ADC inputs, they are no longer 5V

tolerant and the input voltage must be limited to the voltage at the ADC positive reference

pin (VREFP).

All port pins Pn[m] are multiplexed, and the multiplexed functions appear in Table 3 in the

order defined by the FUNC bits of the corresponding IOCON register up to the highest

used function number. Each port pin can support up to eight multiplexed functions.

IOCON register FUNC values which are reserved are noted as “R” in the pin configuration

table.

Table 3.

Pin description

Not all functions are available on all parts. See Table 2 (Ethernet, USB, LCD, QEI, SD/MMC, comparator pins) and Table 5

(EMC pins).

Symbol

Description

P0[0] to

P0[31]

I/O

Port 0: Port 0 is a 32-bit I/O port with individual direction

controls for each bit. The operation of port 0 pins

depends upon the pin function selected via the pin

connect block.

P0[0]

94U15

M10 6637

[3]

I; PU I/O

P0[0] — General purpose digital input/output pin.

CAN_RD1 — CAN1 receiver input.

U3_TXD — Transmitter output for UART3.

I/O

I2C1_SDA — I2C1 data input/output (this pin does not

use a specialized I2C pad).

U0_TXD — Transmitter output for UART0.

P0[1]

96T14

N11

6738

[3]

I; PU I/O

P0[1] — General purpose digital input/output pin.

CAN_TD1 — CAN1 transmitter output.

U3_RXD — Receiver input for UART3.

I/O

I2C1_SCL — I2C1 clock input/output (this pin does not

use a specialized I2C pad).

U0_RXD — Receiver input for UART0.

P0[2]

202

141

[3]

I; PU I/O

P0[2] — General purpose digital input/output pin.

U0_TXD — Transmitter output for UART0.

U3_TXD — Transmitter output for UART3.

P0[3]

204

142

[3]

I; PU I/O

P0[3] — General purpose digital input/output pin.

U0_RXD — Receiver input for UART0.

U3_RXD — Receiver input for UART3.

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