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 189 of 547
NXP Semiconductors
UM10398
Chapter 11: LPC111x Pin configuration (LPC1100XL series,
[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 (V
DD
= 3.3 V));
IA = inactive, no pull-up/down enabled.
[2] 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.
[3] 5 V tolerant pad providing digital I/O functions with configurable pull-up/pull-down resistors and configurable hysteresis.
[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. 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.
[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.
[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.
V
DD
6; 29 - I - 3.3 V supply voltage to the internal regulator, the external rail, and the
ADC. Also used as the ADC reference voltage.
XTALIN 4
[6]
- I - Input to the oscillator circuit and internal clock generator circuits. Input
voltage must not exceed 1.8 V.
XTALOUT 5
[6]
- O - Output from the oscillator amplifier.
V
SS
33 - - - Thermal pad. Connect to ground.
Table 171. LPC1111/12/13/14XL pin description table (HVQFN33 package) …continued
Symbol Pin Start
logic
input
Type Reset
state
[1]
Description