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Power Tools 1993 October - Disc 1
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a3821022
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1992-05-09
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Asynchronous FIFO Interface, Technical Data
For CIO-based HP 9000 Series 800 Systems Product Number 27114B
The HP 27114B Asynchronous FIFO Interface (AFI) provides a high-speed
parallel connection between a CIO-based HP 9000 Series 800 System and
an external device.
The interfacing flexibility of the HP 27114B is enhanced over the
HP 27114A by increased FIFO control (using a FIFO counter), more
handshaking modes, and more control and status lines.
The Hardware Reference Manual and User's Design Guide provide
detailed information on hardware operation, hardware-software
interaction, and writing application software. Documentation includes
application notes and performance information.
HP 27114B is plug-compatible with the HP 27114A in all supported
applications where standard HP-UX drivers are used.
Features
o Backward-compatible with supported applications of 27114A
o Detailed Hardware Reference Manual and User's Design Guide
o Handshaking modes: Full mode (both master and slave) and FIFO master
mode
o FIFO buffering using a 24-bit FIFO counter*
o Differential or single-ended line drivers/receivers**
o Separate data input and output lines
o 8- or 16-bit transfers, half- duplex operation
o Up to 6 each, user-configurable control and status lines
o FIFO buffer is up to 64 words for input, up to 58 words for output **
for single-ended transmission, order option 003
* FIFO Buffer is up to 64 words for input, up to 58 words for output.
** For single-ended transmission, order option 003.
Documentation
Reference Manual: provides detailed information on installation,
configuration, and theory of operation. This manual also includes
hardware troubleshooting information and schematics and PAL equations.
Programmer's Guide: provides detailed information on
hardware-software interaction and writing application software for the
HP 27114B.
Application Notes: provide examples of HP 27114B AFI connection to
itself, a Centronics-type device, and a generic-type device. The
application notes also include sample application programs. These notes
are included with the manuals and are also available separately
(P/N 5958-9044).
Performance Note: provides detailed performance test information on
specific configurations of the HP 27114B. This note is included with
the manuals and is also available separately (P/N 5958-9045).
Functional Specifications
Handshaking Modes
The HP 27114B supports three handshaking modes to accommodate the
protocols of various external devices.
Full Master Mode: The full master mode handshake can be used with
external devices that require the host to wait for an acknowledge from
the device before the host can initiate a data transfer.
Full Slave Mode: The full slave mode handshake is useful when the
external device connected to the AFI card must be the master of the
handshake. This mode allows hardware support of AFI-to-AFI
communication (one card uses the full master mode, and the other uses
full slave mode).
FIFO Master Mode: This mode can be used with external devices that
do not need to acknowledge a host's request to transfer data before the
transfer occurs. This mode is the same as the pulsed mode used by the
27114A.
Data Transfer
Protocol: Transfer either 8 or 16 parallel bits at a time. The
backplane channel can operate either in byte mode or word mode.
Maximum Transfer Rates: The theoretical maximum transfer rate is
4.3 Mbytes/second. Actual transfer rate is system and block size
dependent. For complete information on transfer rate testing, please
refer to the HP 27114B Performance Note (P/N 5958-9045).
HP 27114B AFI cabling
All HP 27114B cables come standard with connectors on both ends. The
reference manual describes how to cut and custom wire the cables. A
special male wire-wrap connector is also included.
o Maximum distance differential mode: 12 meters
o Maximum distance single-ended mode: 3 meters
Line Characteristics
Signal Lines Table 1
RD [15:0] Read Data Bus
SD [15:0] Send Data Bus
PCTL Peripheral Control Output
PFLG Peripheral Flag Input
CTL [3:0] Control Output Lines
STS [3:0] Status Input Lines
PDIR/CTL5 Peripheral Direction Output/Control Output 5
ATTN/STS5 Attention Input/Status Input 5
HEND/CTL4 Host End Output/Control Output 4
PEND/STS4 Peripheral End Input/Status Input 4
Backplane Polling
The HP 27114B is a CIO group 0 polling device, and therefore must be
placed in slots 0 through 7. The default system slot is slot 5.
Logic Sense: Logic sense in single-ended mode transmission can be
configured by the user as specified in the reference manual. Logic
sense in differential mode can be configured by custom wiring the cable
or external peripheral.
Control and Status Bit Communication
CTL [5:0] Control Output: User-configurable control output lines
are available to send information from the AFI card to the external
peripheral. CTL [3:0] are always available as control lines, while
CTL[4] and CTL[5] can be alternatively configured as HEND and PDIR
respectively.
STS [5:0] Status Input: User-configurable status input lines are
available to receive information from the external peripheral to the
AFI card. STS [3:0] are always available as status lines, while STS[4]
and STS[5] may be configured as PEND and ATTN respectively.
PDIR Peripheral Data Direction Output: PDIR defines the data
transfer direction (incoming or outgoing). The user may select either
PDIR or CTL[5].
ATTN Attention Input: An asynchronous interrupt line from the
external peripheral. The user may select either ATTN or STS[5].
HEND Host End Output: The AFI card asserts HEND when the last
output transfer is about to begin or when the last input transfer has
just occurred. The user may select either HEND or CTL[4].
PEND Peripheral End Input: The peripheral device asserts PEND to
signal the end of the incoming or outgoing transfer. The user may
select either PEND or STS[4].
Environmental Characteristics
The HP 27114B operates in any CIO-based HP 9000 Series 800 System under
the operating temperature, humidity, and altitude specifications
specified for the system.
Physical Characteristics
Dimensions: 17.2 cm (6.8 in) long by 17.2 cm (6.75 in) wide.
Weight:
Interface Card, 243 grams (8.5 oz)
3 meter cable, 440 grams (15.5 oz)
Electrical Characteristics
Direct Current Requirements
Voltage: +5 volts
Typical Current: 2.63 amps
Two standard deviation current: 2.8 amps
The HP 27114B requires the following external device specifications
(table 2).
External Device Specifications Table 2
Minimum Maximum Typical
------------------------------------------------------------------
External Device Line Driver Requirements
(HP 27114B uses 26LS32B Line Receivers)
Single-ended Mode:
VOH at IOH = -2.67 mA (max) 2.4 V
VOL at IOL = 24 mA (max) 0.4 V
Differential Mode:
|VOD| at RL = 120Ω 2.0 V
VOC at RL = 120Ω 3.0 V
External Device Line Receiver Requirements
(HP 27114B uses MC3487 Line Drivers)
Single-ended Mode:
VIH 2.0 V
VIL 0.8 V
IIH 20.0 uA
IIL -0.4 uA
Differential Mode:
VICM (common mode voltage) +7.0 V
VTH (differential input threshold voltage) 0.2 V
VTL (differential input threshold voltage) 0.2 V
VHYS (hysteresis voltage) 50 mV
II at VI = 15 V 1.2 mA
II at VI = -15 V -1.7 mA
Line Termination Requirements (receivers):
Single-ended Mode: Equivalent of 220W/330W voltage divider (330W to
GND)
Differential Mode: 120 W between + and 3/4 lines
Ordering Information
The HP 27114B includes:
27114-60101 Printed Circuit Assembly
27114-63001 3-meter terminated cable
1252-1643 96 pin male wirewrap connector
27114-90004 Reference Manual
27114-90003 Programmer's Guide
5958-9044 Application Notes
5958-9045 Performance Note
HP 27114B Options:
0B0 Deletes Reference Manual (27114-90004), Programmer's Guide
(27114-90003), Application Notes (5958-9044), and Performance
Note (5958-9045)
002 Adds loopback test hood (27114-60002)
003 For single-ended transmission, adds 6 single inline pin
resistor packs (1810-0906 and 1810-0677)
004 Replaces 3-meter terminated cable (27114-63001) with 12-meter
terminated cable (27114-63003)
005 Deletes 3-meter terminated cable (27114-63001)
[Figure 1 (Asynchronous FIFO Interface diagram) Caption: none]
From HP Networking Communications Specifications Guide,
5091-3821E, 9205, p 022
Associated files: la382125.gal, la382125.plt
Asynchronous FIFO Interface, Technical Data