UM11082
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© NXP B.V. 2018. All rights reserved.
User Manual
Rev. 1.1 — 12 January 2018
14 of 18
NXP Semiconductors
LPC8N04 Development Board
User Manual
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 LPC8N04 Development Board board. The
external probe must be connected J1. When an external debug probe is used, the
on-board probe must be held in reset by placing a jumper on P1. It is recommended that
P1 is fitted before powering the board.
5. Expansion
connectors/headers
All the usable I/O signals from the LPC8N04 Target are routed to the P4 header, along
with a reset signal and 3.3V power. 12 I/Os are shared with the 5x7 LED array, including
the two SWD signals (PIO0_11 and PIO0_10), and PIO0_3 which is shared with the
speaker driver. These three signal may be disconnected for all these functions using P7,
P8 and P9; for other I/Os to be used the MP and DP sections must be separated or the
560 ohm LED row resistor (R26, R27, R29, R32, R36, R37 or R38) removed. For further
details please refer to the board schematics.
Header P4 is designed to accept either a Grove I2C connector or PMod 6 pin SPI Type 2
connector, for easy connection of off-the-shelf sensors
5.1 Main expansion connectors (DP Board P3, MP Board P4)
The
Table 2.
Arduino expansion connector pin mappings (CN3)
P3 pin P4 pin LPC8N04 pin
PMod connection Grove connection
1
2
PIO0_0 (LED ROW5 / User Button)
2
1
PIO0_4 (LED COL2)
SCL
3
4
PIO0_1 (LED ROW4)
4
3
PIO0_5 (LED COL1)
SDA
5
6
PIO0_3 (SPKR/LED ROW6)
6
5
VCC
VCC
VCC
7
8
PIO0_7 (LED ROW1)
8
7
GND
GND
GND
9
10
PIO0_10 (SWCLK / LED COL3)
10
9
PIO0_6 (LED COL0)
SCK
11
12
PIO0_11 (SWDIO / LED COL4)
12
11
PIO0_9 (LED ROW3)
SDO
13
14
nc
14
13
PIO0_8 (LED ROW2)
SDI
15
16 RESET
16
15
PIO0_2 (LED ROW0)
SSEL