Datasheet

LPC11U3X All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2014. All rights reserved.
Product data sheet Rev. 2.2 — 11 March 2014 16 of 77
NXP Semiconductors
LPC11U3x
32-bit ARM Cortex-M0 microcontroller
[1] Pin state at reset for default function: I = Input; O = Output; PU = internal pull-up enabled; IA = inactive, no pull-up/down enabled;
F = floating; If the pins are not used, tie floating pins to ground or power to minimize power consumption.
[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 32
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 31
).
[4] I
2
C-bus pin compliant with the I
2
C-bus specification for I
2
C standard mode, I
2
C Fast-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 and configurable hysteresis (see Figure 31
);
includes high-current output driver.
[6] 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 31
); includes digital
input glitch filter.
[7] Pad provides USB functions. It is designed in accordance with the USB specification, revision 2.0 (Full-speed and Low-speed mode
only). This pad is not 5 V tolerant.
[8] 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). Leave XTALOUT floating.
PIO1_28/CT32B0_CAP0/
SCLK
-H72431
[3]
I; PU I/O PIO1_28 — General purpose digital input/output pin.
-ICT32B0_CAP0 — Capture input 0 for 32-bit timer 0.
- I/O SCLK — Serial clock input/output for USART in
synchronous mode.
PIO1_29/SCK0/
CT32B0_CAP1
-D73141
[3]
I; PU I/O PIO1_29 — General purpose digital input/output pin.
- I/O SCK0 — Serial clock for SSP0.
-ICT32B0_CAP1 — Capture input 1 for 32-bit timer 0.
PIO1_31 - - 25 -
[3]
I; PU I/O PIO1_31 — General purpose digital input/output pin.
USB_DM 13 G5 19 25
[7]
F-USB_DM — USB bidirectional D line.
USB_DP 14 H5 20 26
[7]
F-USB_DP — USB bidirectional D+ line.
XTALIN 4 D1 6 8
[8]
- - Input to the oscillator circuit and internal clock
generator circuits. Input voltage must not exceed
1.8 V.
XTALOUT 5 E1 7 9
[8]
- - Output from the oscillator amplifier.
V
DD
6;
29
B4;
E2
8;
44
10;
33;
48;
58
- - Supply voltage to the internal regulator, the external
rail, and the ADC. Also used as the ADC reference
voltage.
V
SS
33 B5;
D2
5;
41
7;
54
- - Ground.
Table 3. Pin description
Symbol
Pin HVQFN33 Pin TFBGA48 Pin LQFP48 Pin LQFP64
Reset
state
[1]
Type Description