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 151 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] 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.
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.
PIO3_4 18
[3]
I/O PIO3_4 — General purpose digital input/output pin. (LPC1113/14 only).
PIO3_5 21
[3]
I/O PIO3_5 — General purpose digital input/output pin. (LPC1113/14 only).
CAN_RXD 19
[6]
I CAN_RXD — C_CAN receive data input. (LPC11C12/14 only).
CAN_TXD 20
[6]
O CAN_TXD — C_CAN transmit data output. (LPC11C12/14 only).
V
DD
8; 44 I 3.3 V 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 160. LPC1113/14 and LPC11C12/C14 pin description table (LQFP48 package)
…continued
Symbol Pin Type Description