User manual

LPC4357 Developer’s Kit - User’s Guide

Page 25

Connector and the RF-module (see section 4.14 ) share the same UART channel. Once the RF

module is soldered, the Serial Expansion Connector cannot be used for UART communication.

Also note that pin 13 and 14 on the Serial Expansion Connector, J15, are connected to ADC1

and ADC2, respectively. These pins are input only on the LPC4357. In order to have GPIO

functionality on these two pins on J15, other GPIO signals has to be wired to these pins. This

can easily be done at the J3, J5 and J5 connectors. For example, pin 27 and 29 of J3 can be

shorted/connected. That way, signal MCICMD (carrying LPC4357 pin PC_11) is connected to

GPIO38_AIN1. Pin 21 and 23 of J5 can also be shorted/connected. That way, signal GPIO33_LCD-DC

(carrying LPC4357 pin P4_0) is connected to GPIO37_AIN0.

Figure 14 – Serial Expansion Connector

Signals

LPC4357

GPIO29_SPI-CLK

PF_0, SSP0 is used

GPIO31_SPI-MISO

PF_2, SSP0 is used

GPIO32_SPI-MOSI

PF_3, SSP0 is used

GPIO69

P9_2

SIE_UART_RXD

P2_4 via multiplexor, USART#3 is used

SIE_UART_TXD

P9_3 via multiplexor, USART#3 is used

I2C-SCL

I2C-SDA

GPIO42

P9_6

GPIO72

PC_2

GPIO37_AIN0

ADC1

This is pin 13 of J15. It is suggested to short pin 27 and 29 of

J3 in order to connect LPC4357 pin PC_11 to this signal – to

get GPIO functionality on this pin.

Serial Expansion Connector

J15