User manual

LPC4357 Developer’s Kit - User’s Guide
Page 45
Copyright 2013 © Embedded Artists AB
GPIO79
PF_9
No special usage on OEM Base Board.
GPIO80
P4_3
LCD databit 2.
GPIO81
P4_2
LCD databit 3
BD0-BD15
Buffered signals
Occupied for 16-bit databus versions. Connects to parallel NOR
flash and 16-bit register.
BD16-DB31
Buffered signals
Also occupied for 32-bit databus versions, which is what the
LPC4357 OEM board has.
No special usage on OEM Base Board, but some pins can be
connected to RS232 interface. Make sure all jumpers in JP11
are removed.
BA0-BA23
Buffered signals
The address bus, buffered signals from OEM Board. Connects
to parallel NOR flash and 16-bit register.
BOE
Buffered P1_3
OE, buffered signal from cpu board . Connects to parallel NOR
flash.
BWE
Buffered P1_6
WE, buffered signal from cpu board. Connects to parallel NOR
flash and 16-bit register.
BBLS0
Buffered P1_4
BLS0 controls lower 8 bits of external memory databus (16-bit
parallel register). Connects to 16-bit register.
BBLS1
Buffered P6_6
BLS1 controls upper 8 bits of external memory databus (16-bit
parallel register). Connects to 16-bit register.
BRAS-BCS0-
BBLS2
Buffered PD_13
BLS2 controls bit 16-23 of external memory databus.
BCAS-BCS1-
BBLS3
Buffered PD_10
BLS3 controls bit 24-31 of external memory databus.
BCSY
Buffered P1_5
CS0, chip select for parallel NOR flash.
BCSX
Buffered PD_12
CS2, chip select for parallel 16-bit register.
DBUS_EN-
BCS3
Buffered PD_11
CS3, chip select.
No special usage on OEM Base Board.
VBAT
VBAT
Coin cell battery can connect to vbat signal
ALARM
ALARM
Connected to alarm-LED (active high)
VREF
ADC6
LPC4357 signal connected has nothing to do with VREF. ADC6
placed here to use otherwise unused pins.
Remove resistor R93 on OEM Base board in order to use
ADC6.
VDDA,
VSSA
VDDA,
VSSA
Used to generate reference voltage for trimpot (analog inputs)
SWD/JTAG
signals
SWD/JTAG
signals
Connected to SWD/JTAG connectors
Note that the LPC4357 MCU is sensitive to ESD on the JTAG
port. Observe extra care around this.
Make sure the ground of the JTAG interface is connected to