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 154 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.
[2] Serves as Deep-sleep wake-up input pin to the start logic independently of selected pin function (see the LPC111x/11C1x user manual).
[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.
PIO1_11/AD7 27
[5]
I/O PIO1_11 — General purpose digital input/output pin.
I AD7 — A/D converter, input 7.
PIO2_0 I/O Port 2 — Port 2 is a 12-bit I/O port with individual direction and function
controls for each bit. The operation of port 2 pins depends on the function
selected through the IOCONFIG register block. Pins PIO2_1 to PIO2_11
are not available.
PIO2_0/DTR
1
[3]
I/O PIO2_0 — General purpose digital input/output pin.
O DTR
— Data Terminal Ready output for UART.
PIO3_0 to PIO3_5 I/O 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_0, PIO3_1,
PIO3_3 and PIO3_6 to PIO3_11 are not available.
PIO3_2 28
[3]
I/O PIO3_2 — General purpose digital input/output pin.
PIO3_4 13
[3]
I/O PIO3_4 — General purpose digital input/output pin.
PIO3_5 14
[3]
I/O PIO3_5 — General purpose digital input/output pin.
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 161. LPC1111/12/13/14 pin description table (HVQFN33 package)
…continued
Symbol Pin Type Description