8-Port RS-232/RS-422/RS-485 PC/104 Module

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Emerald-MM-8

- 8 serial ports
- 8 digital I/O lines
- Jumper selectable RS-232, RS-422, RS-485 on all ports
- Up to 460.8kbps data rate
- 16C654 Quad UARTs with 64-byte FIFOs
- Interrupt sharing - any no. of ports or boards
- Interrupt status register for Windows NT
- Dual 40-pin I/O headers (4 ports per header)
- 16-bit PC/104 bus for additional interrupt levels
- +5V only power supply
- -40 to +85ºC operation
Now with higher density than ever, our new Emerald-MM-8 gives you 8 serial ports on a single PC/104 module. Each version of the board provides 8 serial ports operating at speeds up to 460.8kbps. Several versions are available:
EMM-8M-XT 8 ports RS-232/422/485 user selectable
EMM-8232-XT 8 ports fixed RS-232 (low-cost version)


In RS-232 mode, the full complement of standard PC serial port signals (8 signals + ground) are provided for each port. In RS-422 mode, Signals RX+, RX-, TX+, and TX- are provided, along with ground. In RS-485 mode, signals TX+/RX+ and TX-/RX- are provided, along with ground. Ports are grouped 4 per 40-pin I/O header. Ports 1-4 are on the right, and ports 5-8 are on the left.

Two 16C654 quad serial port ICs are used for the serial ports. This chip supports data rates up to 460.8kbps and contains a 64-byte transmit and receive FIFOs for each port to minimize processor overhead.
Grzegorz Kowalczyk 12 323 62 21 Kom: 502 898 801
Krzysztof Świat 12 323 62 25 Kom: 502 899 046
Marcin Obarzanek 12 323 62 26 Kom: 502 899 002
Andrzej Jamrozik 12 323 62 22 Kom: 502 899 048
Justyna Undas 12 323 62 31

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