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OBSOLETE - No Longer Available

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Synchronous RS-422/RS-485
MPAP-200/300..JPG (15Kb)

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blueball.gif (772 bytes) RS-422 or RS-485 serial interface
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Provides Bisync, HDLC and SDLC synchronous
     communication protocols

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4 Mbps maximum data rate
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Configured as DTE
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2K transmit and receive FIFOs
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Programmable baud rate generator
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DOS, Windows and OS/2 supported
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SYNCDRIVE software included
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PCMCIA Card Services Specification 2.1 compliant


This PCMCIA Card is OBSOLETE - No Longer Available
and we do not have a replacement for this!


 Description Return to top of page

MPAP-200/300 is a Type-II PCMCIA card which adds a single multi-protocol serial interface using a Zilog 85230 compatible SCC controller. The port can be configured as RS-422 by connecting an 100 Ohm resistor, or as RS-485 by connecting a 60 Ohm resistor. The SCC can support asynchronous formats, byte-oriented synchronous protocols such as IBM Bisync, and bit-oriented synchronous protocols such as HDLC and SDLC. The SCC also offers internal functions such as on-chip baud rate generators, and digital phase-lock loop (DPLL) for recovering data clocking from received data streams.

Because the PCMCIA 2.1 standard does not support direct memory access (DMA), the MPAP-200/300 supports only interrupt-driven communications. To compensate for the lack of DMA, the card is equipped with 1024-byte transmit and receive FIFOs. With the FIFOs enabled, data can be moved to and from the SCC in large blocks, providing for high data throughput and low interrupt overhead.

The MPAP-200/300 provides standard data rates of 0.6, 1.2, 2.4, 4.8, 9.6, 19.2, 38.4, and 57.6 kbps. Higher data rates up to 2.45 Mbps are achievable subject to the limitations of the cabling and the interrupt response time of the host computer. The MPAP-200/300's top speed is limited by the 85230 SCC, and with an upgraded crystal the card can reach speeds to 4 Mbps.

All necessary software is included to install and configure the card for use with DOS/Windows 3.x, Windows 95/98, and OS/2. In addition, our frame-level HDLC and Bisync driver, SYNCDRIVE, is included free.


 Specifications Return to top of page

BUS INTERFACE: PCMCIA Card Specification 2.1



2.45 MBPS or 4.0 Mbps with an upgraded crystal.
Contact a Interworld sales engineer for information on upgraded crystals available for the MPAP-200/300


CONTROLLER: 85230-compatible 16-MHz SCC

FIFOs: 1024-byte Transmit and Receive FIFOs

I/O ADDRESS RANGE: 16-byte contiguous range required, determined by PCMCIA system

INTERRUPT LEVELS: One IRQ required, determined by PCMCIA system

POWER REQUIREMENTS: 5V, 30mA (typical)

Return to top of page


Standard DSUB-25 MALE connector via a pigtail cable off the Type II PCMCIA Card


Pin 1: Chassis ground
Pin 2: Transmit Data    
Pin 3: Receive Data
Pin 4: Request To Send
Pin 5: Clear To Send
Pin 6: Data Set Ready
Pin 7: Signal Ground
Pin 8: Carrier Detect
Pin 9: Receive Clock In -
Pin 10: Carrier Detect -
Pin 11: Receive Clock Out -
Pin 12: Transmit Clock In -
Pin 13: Clear to Send -
Pin 14: Transmit Data -
Pin 15: Transmit Clock In-
Pin 16: Receive Data-
Pin 17: Receive Clock In
Pin 19: Request To Send-
Pin 20: Data Terminal Ready
Pin 21: Sync In (RS-422)
Pin 22: Data Set Ready-
Pin 23: Data Terminal Ready-
Pin 24: Transmit Clock Out
Pin 25: Chassis Ground



OS SUPPORT:  DOS, Windows 3.1x, Windows 95/98, OS/2, Win 2000 and XP.

INCLUDED SOFTWARE: Quatech's frame-level HDLC and BiSync driver, SyncDrive, is included for Windows 95/98/Me and OS/2. For Windows 2000/XP, SyncDrive Plus, a bit-synchronous SDLC/HDLC driver is also included. Both SyncDrive packages are not application programs themselves, but provide C callable routines and C data structures designed to aid users in the development of their own application software.


USA Office

Address: 1480 Gulf Road, Suite 837,
PO Box 1280
Point Roberts, WA 98281

Western Canada - Vancouver BC

Tel:1.800.663.6001 or 1.604.925.6150
Address: 2454 Haywood Ave
West Vancouver, BC V7V 1Y1

Eastern Canada - Markham, Ontario

Tel:1.800.465.0164 or 1.905.513.7027