Datasheet

UM10398 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2014. All rights reserved.
User manual Rev. 12.3 — 10 June 2014 160 of 547
NXP Semiconductors
UM10398
Chapter 9: LPC111x/LPC11Cxx Pin configuration (LPC1100, LPC1100C,
[1] 5 V tolerant pad. RESET functionality is not available in Deep power-down mode. Use the WAKEUP pin to reset the chip and wake up
from Deep power-down mode. An external pull-up resistor is required on this pin for the Deep power-down mode.
[2] 5 V tolerant pad providing digital I/O functions with configurable pull-up/pull-down resistors and configurable hysteresis.
[3] I
2
C-bus pads compliant with the I
2
C-bus specification for I
2
C standard mode and I
2
C Fast-mode Plus. The pin requires an external
pull-up to provide output functionality. When power is switched off, this pin is floating and does not disturb the I2C lines. Open-drain
configuration applies to all functions on this pin.
[4] 5 V tolerant pad providing digital I/O functions with configurable pull-up/pull-down resistors, configurable hysteresis, and analog input.
When configured as a ADC input, digital section of the pad is disabled and the pin is not 5 V tolerant.
[5] 5 V tolerant digital I/O pad without pull-up/pull-down resistors.
[6] When the system oscillator is not used, connect XTALIN and XTALOUT as follows: XTALIN can be left floating or can be grounded
(grounding is preferred to reduce susceptibility to noise). XTALOUT should be left floating.
PIO2_11/SCK0 31
[3]
I/O PIO2_11 — General purpose digital input/output pin.
I/O SCK0 — Serial clock for SPI0.
PIO3_0 to PIO3_3 Port 3 — Port 3 is a 12-bit I/O port with individual direction and function controls for
each bit. The operation of port 3 pins depends on the function selected through the
IOCONFIG register block. Pins PIO3_4 to PIO3_11 are not available.
PIO3_0/DTR
36
[3]
I/O PIO3_0 — General purpose digital input/output pin.
O DTR
— Data Terminal Ready output for UART.
PIO3_1/DSR
37
[3]
I/O PIO3_1 — General purpose digital input/output pin.
I DSR
— Data Set Ready input for UART.
PIO3_2/DCD
43
[3]
I/O PIO3_2 — General purpose digital input/output pin.
I DCD
— Data Carrier Detect input for UART.
PIO3_3/RI
48
[3]
I/O PIO3_3 — General purpose digital input/output pin.
I RI
— Ring Indicator input for UART.
CANL 18 I/O LOW-level CAN bus line.
CANH 19 I/O HIGH-level CAN bus line.
STB 22 I Silent mode control input for CAN transceiver (LOW = Normal mode, HIGH = silent
mode).
VDD_CAN 17 - Supply voltage for I/O level of CAN transceiver.
V
CC
20 - Supply voltage for CAN transceiver.
GND 21 - Ground for CAN transceiver.
V
DD
8;44 I Supply voltage to the internal regulator, the external rail, and the ADC. Also used as
the ADC reference voltage.
XTALIN 6
[7]
I Input to the oscillator circuit and internal clock generator circuits. Input voltage must
not exceed 1.8 V.
XTALOUT 7
[7]
O Output from the oscillator amplifier.
V
SS
5; 41 I Ground.
Table 163. LPC11C24/C22 pin description table (LQFP48 package)
Symbol Pin Type Description