NXP Semiconductors LPCXpresso802, Руководство пользователя, Страница: 5 / 13

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User Manual Rev. 1.01 — 6 December 2017 5 of 13
NXP Semiconductors
LPCXpresso802
User Manual
Table 1. Jumpers and connectors
Circuit reference Description Reference section
JP1 Power rail selection and/or ammeter connection for LPC802 supply. Insert
a jumper either between the center and left pin for 3.3V or between center
and right pin for 1.8V operation. Note that a jumper must always be
installed for the LPC802 to operate. See schematic.
JP2 Voltage selection for LPC802 ADC reference. Insert a jumper either
between the center and left pin for 3.3V or between center and right pin
for 1.8V operation.When a 3.3V reference is used the LPC802 supply
must also be set to 3.3V (see JP1 above) See schematic.
JP4 Inserting a jumper on JP4 holds the LPC11U35 debug probe in reset.
Install JP4 when using an external debug probe.
[4.1]
JP5, JP6 PIO0_4 (TXD) and PIO0_0 (RXD) are connected to a LPC11U35 debug
probe UART port via these two jumpers. The same LPC802 UART is
shared with the Arduino connectors, so JP5 and JP6 may be removed to
prevent contention between the debug probe and devices connected to
the LPC802 via this peripheral.
[4]
JP7 JP7 is connected in-line between with the anodes of the User LEDs and
the 3.3V VDD supply. This jumper may be removed to prevent unwanted
current draw and when the snap-off section of the board is being used
(since the same ports (PIO0_8, PIO0_9 and PIO0_12) are used to drive
LEDs on that circuitry.) See schematic.
JP8 JP8 is connected in-line with the SPI chip select to the SPI flash memory
device (U6). This jumper may be removed to disable U6 when PIO0_11 is
being used be a device connected to the Arduino expansion connectors. See schematic.
CN1 USB connector for debug probe / board power.
[4]
CN2 External debug probe connector. [4]
CN3 Arduino expansion connectors.
[5.1]
CN6, CN8, CN9 Expansion connectors for snap off board. If the snap-off section of the
board is detached, installing these connectors will enable the snap-off
section to be reconnected via the Arduino connectors.
[7.6]