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 176 of 547
NXP Semiconductors
UM10398
Chapter 10: LPC111x Pin configuration (LPC1100L series, TSSOP, DIP,
[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] 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.
PIO1_5/RTS/
CT32B0_CAP0
14
[3]
no I/O I; PU PIO1_5 — General purpose digital input/output pin.
O- RTS
— Request To Send output for UART.
I- CT32B0_CAP0 — Capture input 0 for 32-bit timer 0.
PIO1_6/RXD/
CT32B0_MAT0
15
[3]
no I/O I; PU PIO1_6 — General purpose digital input/output pin.
I- RXD — Receiver input for UART.
O- CT32B0_MAT0 — Match output 0 for 32-bit timer 0.
PIO1_7/TXD/
CT32B0_MAT1
16
[3]
no I/O I; PU PIO1_7 — General purpose digital input/output pin.
O- TXD — Transmitter output for UART.
O- CT32B0_MAT1 — Match output 1 for 32-bit timer 0.
PIO1_8/
CT16B1_CAP0
17
[3]
no I/O I; PU PIO1_8 — General purpose digital input/output pin.
I- CT16B1_CAP0 — Capture input 0 for 16-bit timer 1.
PIO1_9/
CT16B1_MAT0
18
[3]
no I/O I; PU PIO1_9 — General purpose digital input/output pin.
O- CT16B1_MAT0 — Match output 0 for 16-bit timer 1.
V
DD
21 - - 3.3 V supply voltage to the internal regulator and the external rail.
V
DDA
7 - - - 3.3 V supply voltage to the ADC. Also used as the ADC reference
voltage.
XTALIN 20
[6]
- I - Input to the oscillator circuit and internal clock generator circuits.
Input voltage must not exceed 1.8 V.
XTALOUT 19
[6]
- O - Output from the oscillator amplifier.
V
SS
22 - - Ground.
V
SSA
8 - - - Analog ground.
Table 168. LPC1112/14 pin description table (TSSOP28 and DIP28 packages)
…continued
Symbol
Pin TSSOP28/ DIP28
Start
logic
input
Type Reset
state
[1]
Description