LPC178X datasheet(14/120 Pages) NXP

14 / 120 page

LPC178X_7X

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Preliminary data sheet

Rev. 4 — 1 May 2012

14 of 120

NXP Semiconductors

LPC178x/7x

32-bit ARM Cortex-M3 microcontroller

P0[20]

120

M17

K14

[3]

I/O

P0[20] — General purpose digital input/output pin.

U1_DTR — Data Terminal Ready output for UART1. Can also

be configured to be an RS-485/EIA-485 output enable signal for

UART1.

I/O

SD_CMD — Command line for SD card interface.

I/O

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

specialized I2C pad).

P0[21]

118

M16

K11

[3]

I/O

P0[21] — General purpose digital input/output pin.

U1_RI — Ring Indicator input for UART1.

SD_PWR — Power Supply Enable for external SD card power

supply.

U4_OE — RS-485/EIA-485 output enable signal for UART4.

CAN_RD1 — CAN1 receiver input.

I/O

U4_SCLK — USART 4 clock input or output in synchronous

mode.

P0[22]

116

N17

L14

[6]

I/O

P0[22] — General purpose digital input/output pin.

U1_RTS — Request to Send output for UART1. Can also be

configured to be an RS-485/EIA-485 output enable signal for

UART1.

I/O

SD_DAT[0] — Data line 0 for SD card interface.

U4_TXD — Transmitter output for USART4 (input/output in

smart card mode).

CAN_TD1 — CAN1 transmitter output.

P0[23]

[5]

I/O

P0[23] — General purpose digital input/output pin.

ADC0_IN[0] — A/D converter 0, input 0. When configured as an

ADC input, the digital function of the pin must be disabled.

I/O

I2S_RX_SCK — Receive Clock. It is driven by the master and

received by the slave. Corresponds to the signal SCK in the

I2S-bus specification.

T3_CAP0 — Capture input for Timer 3, channel 0.

P0[24]

[5]

I/O

P0[24] — General purpose digital input/output pin.

ADC0_IN[1] — A/D converter 0, input 1. When configured as an

ADC input, the digital function of the pin must be disabled.

I/O

I2S_RX_WS — Receive Word Select. It is driven by the master

and received by the slave. Corresponds to the signal WS in the

I2S-bus specification.

T3_CAP1 — Capture input for Timer 3, channel 1.

Table 3.

Pin description …continued

Not all functions are available on all parts. See Table 2 (Ethernet, USB, LCD, QEI, SD/MMC, DAC pins) and Table 7 (EMC

pins).

Symbol

Description

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