Systemboard
The systemboard is the heart of the NA-1400. It contains the CPU, memory, network and USB interfaces. Below is an image of the board (Click on the image to get a larger version).
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The major components on the mainboard are:
| CPU | 1 | Intel 80219 XScale processor at 600 MHz |
| Memory | 1 | Viking VI4cu327228 PC1600 256 MB (placed in a socket thus can be changed) |
| Ethernet | 2 | Intel 82541ER gigabit ethernet controller |
| USB | 1 | Philips ISP1561 Hi-Speed USB PCI host controller |
| System controller | 1 | Microchip PIC16F819 microcontroller |
| Flash | 1 | Intel 16MB boot flash |
| Battery | 1 | ST M4T28-BR12SH 48mAH backup battery including timekeeping crystal. |
| Serial | 1 | Maxim MAX3232E RS232 dual serial port tranceivers |
Serial port
The two tranceivers provided by the Maxim MAX3232E chip are connected to J5 on the systemboard. The pinout of J5 is:
| J5 | max3232e | function | description |
|---|---|---|---|
| 1 | nc | not connected | |
| 2 | nc | ||
| 3 | 13 | R1in | Data receive first tranceiver |
| 4 | 7 | T2out | Data transmit second transceiver |
| 5 | 14 | T1out | Data transmit first transceiver |
| 6 | 8 | R2in | Data receive second transceiver |
| 7 | nc | ||
| 8 | nc | ||
| 9 | 15 | GND | Signal ground |
| 10 | nc |
This effectively means that the Newisys NA-1400 has two COM ports which can be routed outside (e.g. to the back of the device) and be put in good use. This only requires a hand-made cable consisting of a header, 5-wire flatcable and two 9-pin sub-D connectors (I reused an old 9-wire flatcable often found in old computers).
