Datasheet

LPC11CX2_CX4 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2013. All rights reserved.
Product data sheet Rev. 3.1 — 15 May 2013 11 of 62
NXP Semiconductors
LPC11Cx2/Cx4
32-bit ARM Cortex-M0 microcontroller
PIO0_1/CLKOUT/
CT32B0_MAT2
4
[3]
yes I/O I; PU PIO0_1 — General purpose digital input/output pin. A LOW level on
this pin during reset starts the flash ISP command handler via UART
(if PIO0_3 is HIGH) or via C_CAN (if PIO0_3 is LOW).
O- CLKOUT — Clockout pin.
O- CT32B0_MAT2 — Match output 2 for 32-bit timer 0.
PIO0_2/SSEL0/
CT16B0_CAP0
10
[3]
yes I/O I; PU PIO0_2 — General purpose digital input/output pin.
I/O - SSEL0 — Slave Select for SPI0.
I- CT16B0_CAP0 — Capture input 0 for 16-bit timer 0.
PIO0_3 14
[3]
yes I/O I; PU PIO0_3 — General purpose digital input/output pin. This pin is
monitored during reset: Together with a LOW level on pin PIO0_1, a
LOW level starts the flash ISP command handler via C_CAN and a
HIGH level starts the flash ISP command handler via UART.
PIO0_4/SCL 15
[4]
yes I/O I; IA PIO0_4 — General purpose digital input/output pin (open-drain).
I/O - SCL — I
2
C-bus, open-drain clock input/output. High-current sink only
if I
2
C Fast-mode Plus is selected in the I/O configuration register.
PIO0_5/SDA 16
[4]
yes I/O I; IA PIO0_5 — General purpose digital input/output pin (open-drain).
I/O - SDA — I
2
C-bus, open-drain data input/output. High-current sink only
if I
2
C Fast-mode Plus is selected in the I/O configuration register.
PIO0_6/SCK0 23
[3]
yes I/O I; PU PIO0_6 — General purpose digital input/output pin.
I/O - SCK0 — Serial clock for SPI0.
PIO0_7/CTS 24
[3]
yes I/O I; PU PIO0_7 — General purpose digital input/output pin (high-current
output driver).
I- CTS
— Clear To Send input for UART.
PIO0_8/MISO0/
CT16B0_MAT0
27
[3]
yes I/O I; PU PIO0_8 — General purpose digital input/output pin.
I/O - MISO0 — Master In Slave Out for SPI0.
O- CT16B0_MAT0 — Match output 0 for 16-bit timer 0.
PIO0_9/MOSI0/
CT16B0_MAT1
28
[3]
yes I/O I; PU PIO0_9 — General purpose digital input/output pin.
I/O - MOSI0 — Master Out Slave In for SPI0.
O- CT16B0_MAT1 — Match output 1 for 16-bit timer 0.
SWCLK/PIO0_10/
SCK0/
CT16B0_MAT2
29
[3]
yes I I; PU SWCLK — Serial wire clock.
I/O - PIO0_10 — General purpose digital input/output pin.
I/O - SCK0 — Serial clock for SPI0.
O- CT16B0_MAT2 — Match output 2 for 16-bit timer 0.
R/PIO0_11/
AD0/
CT32B0_MAT3
32
[5]
yes - I; PU R — Reserved. Configure for an alternate function in the IOCONFIG
block.
I/O - PIO0_11 — General purpose digital input/output pin.
I- AD0 — A/D converter, input 0.
O- CT32B0_MAT3 — Match output 3 for 32-bit timer 0.
PIO1_0 to PIO1_11 Port 1 — Port 1 is a 12-bit I/O port with individual direction and
function controls for each bit. The operation of port 1 pins depends
on the function selected through the IOCONFIG register block.
Table 4. LPC11C22/C24 pin description table
Symbol Pin Start
logic
inputs
Type Reset
state
[1]
Description