Below shows the sharing of signals between the expansion connectors and other
connectors or circuit functions. Refer to the board schematics for more details.
Table 7. Expansion Connector signal sharing
Accelerometer, PMod Slave Connector, Audio Codec,
LCD touch panel controller
7.6 Ethernet port
The LPC546x8/540xx/54S0xx incorporates an on-board 10/100 Mbps Ethernet MAC.
The LPCXpresso546x8/540xx/54S0xx board includes an on-board LAN8720A-CP PHY
and RJ45 jack with integrated link status LEDs.
The MCUXpresso SDK for LPCXpresso546x8/540xx/54S0xx includes drivers, LwIP
stack and several examples to show how the Ethernet function can be used.
7.7 Smart Card (revision E and onwards only)
Smart Card 0 interface connections are routed to J10 pins 13 (P0_20) and 15 (P0_21)
via solder jumpers JS38 and JS37. Since these signals are also used for the EMC
(SDRAM) address lines A2 and A3, these solder jumpers are left open by default. If
these solder jumpers are closed, then care should be taken not to access the SDRAM
and thus cause bus contention.
8. On-board memory
8.1 SDRAM
The board includes a Winbond 128Mb SDRAM (Micron SDRAM used on revision C and
earlier, and some rev D builds), connected to the 16-bit external memory interface
available on the LPC546x8/540xx/54S0xx BGA180 part. The MCUXpresso SDK includes
drivers that have optimized external memory settings for use of this memory.
8.2 Quad SPI flash
The board includes a 128Mb Winbond W25Q128JVFIM Quad-SPI flash (Micron
MX25L12835FM2I-10G used on revision C and earlier, and some rev D builds). The
MCUXpresso SDK includes drivers for use of this memory as a data storage/retrieval
device. Note that drivers for this device may be required for the development tool chain
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