Datasheet

ManualsBrandsNXP SEMICONDUCTORS ManualsMicrocontrollers, Microprocessors & QuartzesEmbedded microcontroller LQFP 64 (10x10) 32-Bit 50 MHz I/O number 54

Product data sheet Rev. 2.3 — 11 September 2014 10 of 71

NXP Semiconductors

LPC11E3x

32-bit ARM Cortex-M0 microcontroller

6.2 Pin description

Table 3 shows all pins and their assigned digital or analog functions in order of the GPIO

port number. The default function after reset is listed first. All port pins have internal

pull-up resistors enabled after reset except for the true open-drain pins PIO0_4 and

PIO0_5.

Every port pin has a corresponding IOCON register for programming the digital or analog

function, the pull-up/pull-down configuration, the repeater, and the open-drain modes.

The USART, counter/timer, and SSP functions are available on more than one port pin.

Table 3. Pin description

Symbol

Pin HVQFN33

(5x5)

Pin HVQFN33

(7x7)

Pin LQFP48

Pin LQFP64

Reset

state

[1]

Type Description

RESET

/PIO0_0 2 2 3 4

[2]

I; PU I RESET — External reset input with 20 ns glitch

filter. A LOW-going pulse as short as 50 ns on this

pin resets the device, causing I/O ports and

peripherals to take on their default states, and

processor execution to begin at address 0. This

pin also serves as the debug select input. LOW

level selects the JTAG boundary scan. HIGH level

selects the ARM SWD debug mode.

-I/OPIO0_0 — General purpose digital input/output

pin.

PIO0_1/CLKOUT/

CT32B0_MAT2

3345

[3]

I; PU I/O PIO0_1 — General purpose digital input/output

pin. A LOW level on this pin during reset starts the

ISP command handler.

-OCLKOUT — Clockout pin.

-OCT32B0_MAT2 — Match output 2 for 32-bit timer

PIO0_2/SSEL0/

CT16B0_CAP0/IOH_0

8 8 10 13

[3]

I; PU I/O PIO0_2 — General purpose digital input/output

pin.

-I/OSSEL0 — Slave select for SSP0.

-ICT16B0_CAP0 — Capture input 0 for 16-bit timer

-I/OIOH_0 — I/O Handler input/output 0.

LPC11E37HFBD64/401 only.

PIO0_3/R/IOH_1 9 9 14 19

[3]

I; PU I/O PIO0_3 — General purpose digital input/output

pin.

--R — Reserved.

-I/OIOH_1 — I/O Handler input/output 1.

LPC11E37HFBD64/401 only.