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LPC3250 Developer’s Kit v2 - User’s Guide
Page 43
Copyright 2012 © Embedded Artists AB
4.27 Usage of CPU Pins
Almost all pins of the LPC3250 are directly available on the expansion connectors. Only in a few cases
are pins used for dedicated functionality like Ethernet interface and chip select signals. Such pins are
not available on the expansion connector. The table below lists all pins and their possible restrictions.
OEM Base
Board signal
name
LPC3250 Pin (OEM
Board signal name)
Usage
GPIO0
GPO_10
LCDPWR signal to LCD expansion connector.
GPIO1
GPO_12
LCDLE signal to LCD expansion connector.
GPIO2
GPO_13
LCDDCLK signal to LCD expansion connector.
GPIO3
GPO_15
LCDFP signal to LCD expansion connector.
GPIO4
GPO_16
LCDENAB signal to LCD expansion connector.
GPIO5
GPO_18
LCDLP signal to LCD expansion connector.
GPIO6
P0.2
LCD databit 4.
GPIO7
P0.3
LCD databit 5.
GPIO8
P0.4
LCD databit 6.
GPIO9
P0.5
LCD databit 7.
GPIO10
GPI_01
Connected to push-button (for enabling service mode). Also
connects to LED (active low).
Connects to USB-to-serial bridge (for automatic service
mode functionality)
GPIO11
GPI_22
LCDCLKIN, an external clock signal can be feed to this pin.
GPIO12
GPO_06
LCD databit 18
GPIO13
LCDVD19 /
PWMOUT2
LCD databit 19
GPIO14
U6_IRTX
Connects to RD1 for CAN channel #1, can also connect to
IrDA transceiver. Note that the LPC3250 does not have a
CAN peripheral.
GPIO15
U6_IRRX
Connects to TD1 for CAN channel #1, can also connect to
IrDA transceiver. Note that the LPC3250 does not have a
CAN peripheral.
GPIO16
U5_TX
Connects to USB-to-serial bridge (TxD on UART #5).
GPIO17
U5_RX
Connects to USB-to-serial bridge (RxD on UART #5).
GPIO18
GPO_02
LCD databit 0
GPIO19
GPO_03
LCD databit 1
GPIO20
GPO_08
LCD databit 8
GPIO21
GPO_09
LCD databit 9
GPIO22
LCDVD16 /
PWMOUT1
LCD databit 16
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