UM11057
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© NXP B.V. 2017. All rights reserved.
User Manual
Rev. 1.0 — 9 June 2017
9 of 14
NXP Semiconductors
UM11057
User Manual
5. Expansion
connectors/headers
The LPCXpresso845MAX board provides multiple options to add additional circuitry or off
the shelf expansion boards; this section describes these options. 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 LPCXpresso845MAX
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 the LPCXpresso
connector (P3), as shown.
Table 2.
Arduino expansion connector pin mappings (Digital connector J1)
J1 Pin
Arduino signal
LPC845 pin
LPCXpresso connector pin
1
I2C SCL
PIO0_10
41
2
I2C SDA
PIO0_11
40
3
AREF
n/a (3.3V)
n/a
4
GND
n/a (GND)
n/a
5
SPI SCK
PIO0_6
7
6
SPI MISO
PIO0_7
6
7
SPI MOSI
PIO1_19
5
8
SPI SSEL
PIO1_18
42
9
PWM
PIO1_14
n/a
10
PIO0_16
n/a
Table 3.
Arduino expansion connector pin mappings (Digital connector J2)
J2 pin
Arduino signal
LPC845 pin
LPCXpresso connector pin
1
PIO0_1
43
2
PWM
PIO0_28
n/a
3
PWM
PIO1_20
n/a
4
PIO1_21
n/a
5
INT/PWM
PIO0_20
n/a
6
INT
PIO0_21
n/a
7
TX
PIO0_25
48
8
RX
PIO0_24
49
Table 4.
Arduino expansion connector pin mappings (Analog connector J6)
J1 Pin
Arduino signal
LPC845 pin
LPCXpresso connector pin
1
A0
PIO0_14
15
2
A1
PIO0_23
16
3
A2
PIO0_19
17
4
A3
PIO0_18
19
5
A4
PIO0_17
20
6
A5
PIO0_29
18
