Direct I/O RS-232 Serial Interface, Technical Data
   For HP 9000 Series 200/300 Computer Systems Product Number 98644A
The HP 98644A Serial Interface is an RS-232-C* compatible interface
used for simple asynchronous I/O applications with HP 9000 Series 200
or 300 systems. This includes driving terminals, line printers, and
modems.
   *RS-232-C is a data communication standard established and published
by the Electronic Industries Association (EIA). Copies of the standard
are available from the association at 20001 Eye Street N.W., Washington
D.C. 20006. Its equivalent for European applications is CCITT V.24.

Features
o Inexpensive serial interface
o EIA RS-232-C (CCITT V.28/V.24) compatibility
o Modem control
o Data rates from 50 to 19,200 baud
o Software selectable character length and number of stop bits
o Software selectable parity configuration
o Software selectable baud rate
o Interface to Series 200/300 RS-232-C compatible
  peripherals--terminals, modems, printers
o Support of remote keyboard enable
o Interrupt capability through status or modem signal lines
o Standard 25-pin connector compatibility

Functional Specifications
   Physical Specifications
      Length:  14.6 cm (5.75 in)
      Width:  19.2 cm (7.56 in)
      Thickness:  2.95 cm (1.16 in)
      Weight:  0.94 kg (0.43 lbs)
      Shipping Weight:  2.29 kg (1.04 lbs)

Environmental Specifications
   Temperature:  0 degrees C to 55 degrees C (32 degrees F to 131
      degrees F)
   Relative Humidity:  5% to 95% at 40 degrees C (104 degrees F)
   Altitude:  4,572 meters (15,000 feet)

Electrical Specifications
    +5 V supply    2.03 watts
   +12 V supply    0.30 watts
   -12 V supply    0.03 watts
   Total Power Consumption:   2.36 watts RMS. This card does not have
battery backup capabilities.
   Data Rates
   Standard software selectable data rates (bits/second) available:
   50     75     110    134.5
   150    200    300    600
   1200   1800   2400   3600
   4800   7200   9600   19200
   The 98644A interface is recommended for use in character mode
applications only.
   Pin and Signal Assignment
    1   Frame Ground
    2   Transmitted Data
    3   Received Data
    4   Request to Send
    5   Clear to Send
    6   Data Set Ready
    7   Signal Ground
    8   Carrier Detect
   20   Data Terminal Ready
   22   Ring Indicator
   23   Data Rate Select
   Comparison with HP 98626A RS-232-C Interface
o The 98644A uses a standard 25-pin female DTE connector instead of the
  50-pin connector used in the 98626A.
o The 98644A will not support the following connection products:
  13265A 300 Baud Mode or 13266A Current Loop Interface. These products
  are supported with the 98626A serial interface. They take their power
  via the 50-pin interface connector. The 98644A does not provide power
  through its 25-pin connector.
o The 98644A has no switches for setting the baud rate and the
  character format. These parameters are software programmable.

Ordering Information
Earliest Language Version Recommended:   BASIC 3.0, Pascal 3.0, HP-UX
2.1.
   The 98644A RS-232 Serial Interface includes:
      98644-66502 Serial Interface Card
      98644-90002 Installation and Reference Manual
   Recommended Cables:  Cables must be ordered from HP's Direct
Marketing Division (DMK).
      HP 13222Y 5-meter cable for 262X Terminals (25-pin male to 50-pin
         male)
      HP 13232Y 4.5-meter cable for 264X Terminals (25-pin male to
         264X)
      HP 13242G 5-meter cable for Terminals and 2601A printer (25-pin
         male to 25-pin male)
      HP 13242N 5-meter for Modems (25-pin male to 25-pin male)
   The test connector (P/N 98644-67950) is available from HP's
Corporate Parts Center (CPC).

From HP Networking Communications Specifications Guide,
   5091-3821E, 9205, p 056
Associated files: none
Direct I/O RS-232 Serial Interface, Technical Data