LPCXpresso Base Board rev B - User’s Guide
Page 39
Copyright 2011 © Embedded Artists AB
4.4
I2C/SPI
There are two peripherals, as presented in the I2C and SPI sections, which can be connected to either
the I2C or the SPI interfaces. These two peripherals have both I2C and SPI interfaces. The SPI
interface has higher data rate but require more signals.
OLED display, see schematic page 10, OLED1. See subsection 4.4.1
Dual UART (SC16IS752), see schematic page 10, U19. See subsection 4.4.2
4.4.1
OLED Display
The OLED display, OLED1 (schematic page 10), can be connected either to the SPI-bus or the I2C-
bus. Always insert a jumper in J44 (schematic page 10) in order to allow GPIO_29 to control the
OLED-voltage (about 11V). See Figure 39 for details.
For SPI interface (default), insert jumpers in J42, J43, J45 pin1-2 and J46 pin 1-2 (schematic
page 10), as illustrated in Figure 39. Note that SPI mode is illustrated by blue jumpers.
For I2C interface, insert jumpers in J45 pin 2-3, J46 pin 2-3 and J47 (schematic page 10), as
illustrated in Figure 39. Note that I2C mode is illustrated by yellow jumpers.
Figure 39 – Jumper Setting: OLED in SPI/I2C Mode
