apu4d2 = 4 i211AT LAN / AMD GX-412TC CPU / 2 GB DRAM / single SIM
apu4c2 = 4 i211AT LAN / AMD GX-412TC CPU / 2 GB DRAM / single SIM

• CPU: AMD Embedded G series GX-412TC, 1 GHz quad Jaguar core with 64 bit and AES-NI support, 32K data + 32K instruction cache per core, shared 2MB L2 cache.
• DRAM: 2 or 4 GB DDR3-1333 DRAM
• Storage: Boot from SD card (internal sdhci controller), external USB or m-SATA SSD. 1 SATA + power connector. mSATA is shared with miniPCI express.
• 12V DC, about 6 to 12W depending on CPU load. Jack = 2.5 mm, center positive
• Connectivity: 4 Gigabit Ethernet channels (Intel i211AT)
• I/O: DB9 serial port, 2 USB 3.0 external + 2 USB 2.0 internal, three front panel LEDs, pushbutton
• Expansion: 3 miniPCI express (J13 USB or mSATA, apu4*4: with SIM; J14 USB only, with SIM; J15: full miniPCI express, but no SIM, intended for wifi). GPIO header, optional I2C bus, COM2 (3.3V RXD / TXD).
• Board size: 6 x 6" (152.4 x 152.4 mm) - same as apu1d, alix2d13 and wrap1e.
• Firmware: coreboot (please contact support@pcengines.ch for source code if desired).
• Cooling: Conductive cooling from the CPU to the enclosure using a 3 mm alu heat spreader (included).

• Change battery holder footprint to avoid contact problems.
• Add series resistor to W_DIS# signal on miniPCI express to support Quectel EP06 modules.

• Minimize leakage from V3A to V3 rail (SD card compatibility)
• Fix USB header J12 pinout.
• Change SIM switch to FXLA2203, FXLA2204 went EOL.
• New 2GB version apu4c2, single SIM socket.
• Optional 10 pin LPC header to allow for future TPM option.