UM11057
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© NXP B.V. 2017. All rights reserved.
User Manual
Rev. 1.0 — 9 June 2017
10 of 14
NXP Semiconductors
UM11057
User Manual
Note that the default ports for ISP boot are connected to J1 (I2C) J2 (USART).
The Arduino power connector (J5) pin 2 (IOREF) and pin 3 (+3V3) are routed to the 3.3V
regulator output. J5 pin 5 (5V) is routed to the 5V supply from USB. J5 pin 8 (VIN) can
also be connected to this 5V supply by closing solder jumper SJ16 (this connection is
required by some Arduino shields).
5.2 PMod connector
The LPCXpresso845MAX board is designed to accommodate a 0.1” header for PMod
compatible boards (the header is not installed during manufacture). The circuit reference
for this header is J3. The board provides SPI, I2C and GPIO connections from the
LPC845 target, each signal routed via a 100 ohm connector to prevent accidental
damage.
5.3 LPCXpresso expansion connector (P3)
The LPCXpresso expansion connector follows the signal / port mappings common to
other MAX-style LPCXpresso, LPCXpresso V2, LPCXpresso-CD and the original
LPCXpresso boards. Refer to the schematic for a full list of pin connections.
The USART connections from LPC845 that are routed to the LPC11U35 debug probe are
also present on P3 (pins 13 & 14). If using P3 to access this peripheral, disconnect the
debug probe connections by removing SJ17 and SJ18. Note that if SJ17 and SJ18 are
removed then headers P6 and P7 may be installed to provide a convenient way of
connecting/disconnecting the USART to the debug probe.
5.4 Prototyping area
A prototyping (or “breadboarding”) area is provided, adjacent to the PMod connector,
made up of 20 holes. The top row (TP1 through TP4) are connected to the 3.3V regulator
output, and the bottom row (TP17 through 20) are connected to ground. The remaining
holes (TP5 through TP16) are not connected to anything else on the board.
Table 5.
PMod connector pin mappings (J3)
J3 Pin
PMod signal
LPC845 pin
1
SPI SSEL
PIO0_22
2
SPI MOSI
PIO0_27
3
SPI MISO
PIO0_26
4
SPI SCK
PIO0_15
7
GPIO
PIO1_10
8
GPIO
PIO0_13
9
I2C SCL
PIO1_12
10
I2C SDA
PIO1_13
