User`s guide
LPC3250 Developer’s Kit - User’s Guide
Page 12
Copyright 2011 © Embedded Artists AB
3.1.7 Schematic Page 8: Expansion Connector
The LPC3250 OEM Board integrates the core part of a typical LPC3250 board design with a
reasonable large amount of external memories. All relevant signals of LPC3250 are available on the
200 pos, 0.6mm pitch expansion connector (SODIMM-200 format). See the next section for a detailed
list of available pins.
3.2 Usage of CPU Pins
Almost all pins of the LPC3250 are directly available on the expansion connectors. Only in a few cases
pins are used for dedicated functionality like (dynamic) memory control signals, chip select signals and
power supply. Such pins are not available on the expansion connector. The table below lists all pins
and their possible restrictions.
Pin
Available on expansion connector
ADIN0 (TS_XM)
ADIN1 (TS_YM)
ADIN2 (TS_AUX_IN)
TS_XOUT
TS_YOUT
Yes
I2C1_SCL
I2C1_SDA
I2C2_SCL
I2C2_SDA
Yes, but I2C-E2PROM (U5 – 24LC256) and
core voltage generator (U7, LTC3447)
connected to I2C1 pins.
Note that these signals have 2.2K pull-up
resistors.
SPI1_CLK / SCK0
SPI1_DATIO / MOSI0 / MCFB2
SPI1_DATIN / MISO0 / GPI_25 / MCFB1
GPIO_05 / SSEL0 / MCFB0
Yes, but note that SPI NOR flash is
connected to these signals.
HIGHCORE / LCDVD[17]
ONSW
Yes
Note that HIGHCORE signal can control
adjustable core voltage of R28 mounted
(normally not mounted).
I2S1TX_CLK / MAT3.0
I2S1TX_SDA / MAT3.1
I2S1TX_WS / CAP3.0
MS_BS / MAT2.1
MS_DIO0 / MAT0.0
MS_DIO1 / MAT0.1
MS_DIO2 / MAT0.2
MS_DIO3 / MAT0.3
MS_SCLK / MAT2.0
P0.0 / I2S1RX_CLK
P0.1 / I2S1RX_WS
P0.2 / I2S0RX_SDA / LCDVD[4]
P0.3 / I2S0RX_CLK / LCDVD[5]
P0.4 / I2S0RX_WS / LCDVD[6]
P0.5 / I2S0TX_SDA / LCDVD[7]
P0.6 / I2S0TX_CLK / LCDVD[12]
P0.7 / I2S0TX_WS / LCDVD[13]
PWM_OUT1 / LCDVD[16]
PWM_OUT2 / LCDVD[19]
SPI2_CLK / SCK1 / LCDVD[23]
SPI2_DATIN / MISO1 / LCDVD[21] / GPI_27
Yes
Note:
Pull-up on GPI_01/SERVICE_N
GPO_01 and GPO_14 controls
LED1/LED2
GPI_03 has pull-down resistor
GPI_05 has pull-down resistor
GPI_28 has pull-up resistor
U7_HCTS/CAP0.1/LCDCLKIN/
GPI_22 has pull-up resistor
GPO_19 controls NAND write protect
signal