Datasheet

UM11083 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2018. All rights reserved.
User Manual Rev. 1.0 — 9 February 2018 9 of 16
NXP Semiconductors
LPCXpresso804
User Manual
5.1 Arduino UNO Rev 3 expansion connectors
The Arduino UNO Rev 3 compatible connectors provided on the LPCXpresso804 board
provide I
2
C, 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 C6 and CN7.)
Table 2. Arduino expansion connector pin mappings (CN4)
Pin Arduino signal LPCXpresso804 Shared with
3 Reset (active low) Reset/PIO0_5 Reset button, SWD reset input
4 3.3V Regulator (U3) output -
5 5V To board regulator
inputs (U3 and U5)
-
6 GND GND -
7 GND GND -
Table 3. Arduino expansion analog connector pin mappings (CN5)
Pin Arduino signal LPC804 pin Shared with
1 A0 PIO0_10 CN6, potentiometer
2 A1 PIO0_16 CN6, SPI flash chip select
3 A2 PIO0_17 CN6
4 A3 PIO0_7 CN7, CN3, Grove connector, LM75
5 A4 PIO0_4 CN6, CN8
6 A5 PIO0_1 CN7, SPI Flash (clk)
Table 4. Arduino expansion connector pin mappings (CN3)
Pin Arduino signal LPC804 pin Shared with
1 SCL PIO0_14 CN7, Grove connector, LM75
2 SDA PIO0_7 CN7, CN5, Grove connector, LM75
3 AREF AREF
4 GND GND
5 SPI SCK PIO0_1 User button, SPI flash
6 SPI MISO PIO0_9 CN7, SPI flash
7 SPI MOSI PIO0_8 CN7, SPI flash
8 SPI SSEL PIO0_15 CN7
9 PWM/GPIO PIO0_18 CN6
10 PWM/GPIO PIO0_20 CN7
Table 5. Arduino expansion connector pin mappings (CN8)
Pin Arduino signal LPC804 pin Shared with
2 PWM/GPIO PIO0_19 CN7
3 PWM/GPIO PIO0_11 CN6, blue user LED
4 PWM/GPIO PIO0_13 CN6, User button, red user LED
5 INT PIO0_21 CN6