LPC540xx
NXP Semiconductors
32-bit ARM Cortex-M4 microcontroller
6.2 Pin description
On the LPC540xx, digital pins are grouped into several ports. Each digital pin can support
several different digital functions (including General Purpose I/O (GPIO)) and an
additional analog function.
Table 4.
Symbol
Pin description
Description
[2]
PIO0_0
C4 D6 196 93
PU; Z I/O PIO0_0 — General-purpose digital input/output pin.
Remark: In ISP mode, this pin is set to the Flexcomm 3 SPI
SCK function.
I
CAN1_RD — Receiver input for CAN 1.
I/O FC3_SCK — Flexcomm 3: USART or SPI clock.
O
I
CTimer_MAT0 — Match output 0 from Timer 0.
SCT0_GPI0 — Pin input 0 to SCTimer/PWM.
O
PDM0_CLK — Clock for PDM interface 0, for digital
microphone.
[2]
PIO0_1
A1 A1 207 100
PU;
ZPU;
Z
I/O PIO0_1 — General-purpose digital input/output pin.
Remark: In ISP mode, this pin is set to the Flexcomm 3 SPI
SSEL0 function.
O
CAN1_TD — Transmitter output for CAN 1.
I/O FC3_CTS_SDA_SSEL0 — Flexcomm 3: USART
clear-to-send, I2C data I/O, SPI Slave Select 0.
I
I
I
CT0_CAP0 — Capture input 0 to Timer 0.
SCT0_GPI1 — Pin input 1 to SCTimer/PWM.
PDM0_DATA — Data for PDM interface 0 (digital
microphone).
[2]
PIO0_2/
TRST
A7 E9 174 83
PU; Z I/O PIO0_2 — General-purpose digital input/output pin. In
boundary scan mode: TRST (Test Reset).
Remark: In ISP mode, this pin is set to the Flexcomm 3 SPI
MISO function.
I/O FC3_TXD_SCL_MISO — Flexcomm 3: USART transmitter,
I2C clock, SPI master-in/slave-out data.
I
CT0_CAP1 — Capture input 1 to Timer 0.
SCT0_OUT0 — SCTimer/PWM output 0.
SCT0_GPI[2] — Pin input 2 to SCTimer/PWM.
O
I
I/O EMC_D[0] — External Memory interface data [0].
LPC540xx
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© NXP Semiconductors N.V. 2018. All rights reserved.
Product data sheet
Rev. 1.8 — 22 June 2018
13 of 168
NXP [ NXP ]
