Datasheet

Table Of Contents
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 14 of 62
NXP Semiconductors
LPC11Cx2/Cx4
32-bit ARM Cortex-M0 microcontroller
[1] Pin state at reset for default function: I = Input; O = Output; PU = internal pull-up enabled (pins pulled up to full V
DD
level); IA = inactive,
no pull-up/down enabled.
[2] 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. See Figure 26
for the
reset pad configuration.
[3] 5 V tolerant pad providing digital I/O functions with configurable pull-up/pull-down resistors and configurable hysteresis (see Figure 25
).
[4] 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.
[5] 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 (see Figure 25
).
[6] 5 V tolerant digital I/O pad without pull-up/pull-down resistors.
[7] 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.
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 4. LPC11C22/C24 pin description table
Symbol Pin Start
logic
inputs
Type Reset
state
[1]
Description