UM11081
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© NXP B.V. 2017. All rights reserved.
User Manual
Rev. 1.01 — 6 December 2017
8 of 13
NXP Semiconductors
LPCXpresso802
User Manual
The CMSIS, DISK and COMM LEDs are connected to the LPC11U35 device. The
behavior of the LEDs will vary depending on firmware used, typically the CMSIS LED will
blink when debug communication is occurring, and the COMM LED will blink when data is
being transferred over the VCOMM port.
4.1 Using an external debug probe
An external debug probe that supports ARM’s SWD interface, such as a SEGGER J-Link
or PE Micro probe, can be used with the LPCXpresso802 board. The external probe must
be connected CN2. When an external debug probe is used, the on-board probe must be
held in reset by placing a jumper on JP4. It is recommended that JP4 is fitted before
powering the board.
5. Expansion
connectors/headers
The LPCXpresso802 board provides an Arduino UNO R3 shield site and a Grove I2C
connector to add additional peripherals, sensors or other circuitry, including off-the-shelf
expansion boards; this section describes these options. All LPC802 signals are also
available on breakout headers CN4 and
. For further details please refer to the board schematics.
5.1 Arduino UNO Rev 3 expansion connectors
The Arduino UNO Rev 3 compatible connectors provided on the LPCXpresso802 board
provide I2C, SPI, UART, PWM and analog function connections to shield boards that are
available from various 3rd part suppliers, or for customer use. The pin mappings are
shown in the tables below. Some connections are shared with other board features, as
shown (in addition to being available on breakout headers CN4 and CN5.)
Table 2.
Arduino expansion connector pin mappings (CN3)
CN3 pin
Arduino signal
LPC802 pin
Shared with
9
A0
PIO0_15
Potentiometer
15
I2C SCL
PIO0_16
Temperature sensor
Grove connector (CN7)
16
I2C SDA
PIO0_10
Temperature sensor
Grove connector (CN7)
17
AREF
n/a (3.3V)
18
GND
n/a (GND)
19
SPI SCK
PIO0_14
SPI flash
20
SPI MISO
PIO0_1
SPI flash
21
SPI MOSI
PIO1_13
SPI flash
22
SPI SSEL
PIO1_11
SPI flash
23
PWM
PIO1_17
24
GPIO
PIO0_12
User LED3
25
PIO0_8
User LED1
26
PWM
PIO0_12
User LED3
27
PWM
PIO0_7