User manual

LPC4357 Developer’s Kit - User’s Guide
Page 38
Copyright 2013 © Embedded Artists AB
On rev B of the OEM base board, JP34 has been added to support the LPC4357 OEM board. JP34
shall be in position 2-3 to route signal LCD_VD3 properly (to where LCD_VD18 otherwise is). The
reason for this is for backward compatibility with previous OEM board designs. Note that the default
setting for JP34 is 1-2 and not 2-3, which it should be for LPC4357.
For performance reasons (on the LPC4357), a system with 16-bit color information per pixel is typically
what is implemented.
See picture below for locating relevant components. The table below lists signal connections.
Figure 25 – LCD Expansion Interface
Signals
LPC4357
I2C-SDA
I2C-SDA
I2C-SCL
I2C-SCL
LCD_UART_RXD
P2_4 via multiplexor, USART#3 is used
LCD_UART_TXD
P9_3 via multiplexor, USART#3 is used
BSPI_SCK
PF_0 via buffer
BSPI_MOSI
PF_3 via buffer
GPIO31
PF_2
GPIO30
PF_1
GPIO33
P4_0
GPIO34
PE_15
GPIO70
P8_1
GPIO42
P9_6
4.25 SP15: I2S Audio Codec
The board contains an I2S audio codec based on UDA1380 from NXP. The codec is controlled via I2C
and audio data is transferred over the I2S bus.
The OEM Base Board supports different OEM Boards and the I2S signals can be located at two
different groups of signals from the OEM Board. Jumper JP22-JP27 selects which group of signals to
connect to the I2S interface of the UDA1380. For LPC4357 OEM Board, set all jumpers in lower
position (see picture below).
LCD Expansion Connector
J26
Expansion Connector Options
Left-to-right:
SJ11, SJ6, SJ10, SJ7, SJ8, SJ9
Expansion Connector
JP21
Jumper
JP34