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 4 of 16
NXP Semiconductors
LPCXpresso804
User Manual
2. Board Layout
Figure 2 below shows the layout of the LPCXpresso804 board, indicating location of
jumpers, buttons and connectors/expansion options.
Table 1 below shows the layout of the LPCXpresso804 board, indicating location of
jumpers, buttons, connectors/expansion options and MCU devices.
Fig 2. Board layout (top silkscreen)
c
c
CN5
c
CN4
c
CN8
CN3
CN9
c
CN6
c
CN7
CN1
CN2
UART J2
Jumpers JP24
JP4
JP22
JP21
JP4
JP23
JP3
JP5
JP8
VDD
select
S1
S2
S1
Pot
User LEDs
Debug
probe LEDs
JP7
VREF
select
JP1
Table 1. Jumpers and connectors (LPCXpresso804 board)
Circuit reference Description Reference section
JP1 On-chip debug probe disable. Insert a jumper on this header to disable
the on-board debug probe and use an external probe.
[4]
JP2 and JP24 LPC804 UART connections to debug probe. Remove these jumpers to
disconnect the LPC804 UART port default (ISP) pins from the debug
probe (JP2 for PIO0_0 and JP24 for PIO0_4).
[4]
JP3 SPI flash select connection. Remove this jumper to disable the SPI flash
for power measurement or to use the select signal pin for other purposes.
[7.5]
JP4 and JP23 Connections from SCL (JP4) and SDA (JP23) are routed from the LM75
to the LPC804 PIO0_14 and PIO0_7 via these jumpers. Remove the
jumpers during low power measurements or if these LPC804 pins are
being used for another function.
[7.4]
JP5 Install an ammeter across JP5 to measure current supplied to the LPC804
device. JP5 should be installed at all other times.
[6]
JP6 This jumper is not installed by default. It is provided for future support of
dual rail versions of the LPC804.
See schematic.