OM13502, PCA2117 demo board
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2014. All rights reserved.
Rev. 1 — 3 September 2014
2.3 Jumpers
The board contains a number of jumpers. Below they are listed, along with their
functionality.
• JP1 through JP6: They are all used to select either the I²C-bus interface, or the
SPI interface. They need to be all in the same position. The silk screen indicates
which position to use for a given interface. Refer also to the datasheet.
• JP7: This jumper connects the V
LCDOUT
and V
LCDSENSE
to the V
LCDIN
pin of the
PCA2117. It must be placed if the internal voltage generation is used.
• JP8: This jumper connects the V
LCDIN
pin of the LCD driver to the external voltage
VLCD_EXT from regulator IC1. However, if also the internal voltage generator is
enabled, this can cause damage to the LCD driver.
• JP9: This jumper may not have been soldered into the board during
manufacturing. Instead, a 0 Ω resistor (R0) is mounted, in parallel with this jumper.
Removing the 0 Ω resistor and mounting the jumper makes it easy to insert a
current meter and measure the current consumption to the V
DD
pins of the
PCA2117. After measurements, a jumper header can be inserted.
2.4 Use of internal/external oscillator
The PCA2117 offers the option of using the internal oscillator or to use an external
oscillator. Resistor jumper R13 (0 Ω) connects the OSC pin to V
SS
for selecting the
internal oscillator. If an external oscillator signal is desired, R13 must be removed and
R12 must be mounted. If the internal oscillator is used, the oscillator signal is available at
connector pin “CLK”. If an external oscillator signal is used, this can be supplied to the
LCD driver using this connector “CLK”.
2.5 Connectors
Besides the previously mentioned connectors, connector P3 contains the I²C and SPI
signals, along with V
SS
and a reset signal. This connector can be used to connect the
baseboard to another application/microcontroller. In that case, the LPCXpresso board
must be removed.
2.6 LPCXpresso
LPCXpresso is a low-cost development platform available from NXP. The software
consists of an enhanced, Eclipse-based IDE, a GNU C compiler, linker, libraries, and an
enhanced GDB debugger. The hardware consists of the LPCXpresso development board
which has an LPC-Link debug interface and an NXP LPC ARM-based microcontroller
target. LPCXpresso is an end-to-end solution enabling embedded engineers to develop
their applications from initial evaluation to final production.
The LPCXpresso IDE, is based on the popular Eclipse development platform and
includes several LPC-specific enhancements. It is an industry-standard GNU tool chain
with an optimized C library that gives engineers all the tools necessary to develop high-
quality software solutions quickly and cost-effectively. The C programming environment
includes professional-level features. There is syntax coloring, source formatting, function
folding, on- and offline help, and extensive project management automation.
The LPCXpresso target board, jointly developed by NXP, Code Red Technologies, and
Embedded Artists, includes an integrated JTAG debugger (LPC-Link), so there is no
need for a separate JTAG debug probe. The target portion of the board can connect to
