abaco systems PMC423 Quick user guide

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Hardware Reference Manual
PMC423* Port Serial, Front/Rear I/O
THE PMC423 IS DESIGNED TO MEET THE EUROPEAN UNION (EU) RESTRICTIONS OF
HAZARDOUS SUBSTANCE (ROHS) DIRECTIVE (2002/95/EC) CURRENT REVISION.
Publication No. RX-URMH 006 Rev. E.0
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2PMC423* Port Serial, Front/Rear I/O Publication No. RX-URMH 006 Rev. E.0
Document History
Revision Date Description
C.0 July 2011 Hardware Reference Manual
D.0 October 2016 Reformatted
E.0 December 2016 Corrected error in Table 1 per ECO 28084
Waste Electrical and Electronic Equipment (WEEE) Returns
Abaco Systems is registered with an approved Producer Compliance Scheme (PCS) and, subject
to suitable contractual arrangements being in place, will ensure WEEE is processed in
accordance with the requirements of the WEEE Directive.
Abaco Systems will evaluate requests to take back products purchased by our customers before
August 13, 2005 on a case by case basis. A WEEE management fee may apply.
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Publication No. RX-URMH 006 Rev. E.0 Contents 3
About This Manual
Conventions
Notices
This manual may use the following types of notice:
WARNING
Warnings alert you to the risk of severe personal injury.
CAUTION
Cautions alert you to system danger or loss of data.
NOTE
Notes call attention to important features or instructions.
TIP
Tips give guidance on procedures that may be tackled in a number of ways.
LINK
Links take you to other documents or websites.
Numbers
All numbers are expressed in decimal, except addresses and memory or register
data, which are expressed in hexadecimal. Where confusion may occur, decimal
numbers have a “D” subscript and binary numbers have a “b” subscript. The prefix
“0x” shows a hexadecimal number, following the ‘C’ programming language
convention. Thus:
One dozen = 12D= 0x0C = 1100b
The multipliers “k”, “M” and “G” have their conventional scientific and engineering
meanings of x103, x106and x109, respectively, and can be used to define a transfer
rate. The only exception to this is in the description of the size of memory areas,
when “K”, “M” and “G” mean x210, x220 and x230 respectively.
In PowerPC terminology, multiple bit fields are numbered from 0 to n where 0 is the
MSB and n is the LSB. PCI terminology follows the more familiar convention that bit
0 is the LSB and n is the MSB.
Text
Signal names ending with a tilde (“~”) denote active low signals; all other signals are
active high. “N” and “P” denote the low and high components of a differential signal
respectively.
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4PMC423* Port Serial, Front/Rear I/O Publication No. RX-URMH 006 Rev. E.0
Further Information
Abaco Website
You can find information regarding Abaco products on the following website:
LINK
https://www.abaco.com
Abaco Documents
This document is distributed via the Abaco website. You may register for access to
manuals via the Abaco website above.
LINKS
https://www.abaco.com/products/pmc423-serial-io-mezzanine
Technical Support Contact Information
You can find technical assistance contact details on the Embedded Support page.
LINK
https://www.abaco.com/embedded-support
Abaco will log your query in the Technical Support database and allocate it a unique
Case number for use in any future correspondence.
Alternatively, you may also contact Abaco’s Technical Support at the website below:
LINK
[email protected]
Returns
If you need to return a product, there is a Return Materials Authorization (RMA)
form available on the Embedded Support page.
LINK
https://www.abaco.com/embedded-support
Do not return products without first contacting the Abaco Repairs facility.
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Publication No. RX-URMH 006 Rev. E.0 Contents 5
Additional Notes
Introduction
The PMC423* is a versatile sixteen port serial controller in PCI Mezzanine Card
(PMC) format. Signaling characteristics of each port can be controlled for RS232,
RS422 or RS485 operations. The signaling protocol configuration is per four
channels, providing four independent configuration settings. The serial interfaces
are implemented using an Octal UART. This combines compatibility with the most
commonly used components (16C550 compatible register set), with full support of
PCI attributes (e.g., 32-bit data transfers) for increased performance. This allows
rapid integration to legacy systems, while providing an evolutionary path for
enhanced software to improve performance.
Product Features
The PMC423 is a powerful and flexible method to integrate serial data channels to a
PCI system. Features include:
•Sixteen independent serial channels
•Programmable baud rate from 100-bits/second to 921.6Kbits/s (*with default
Crystal at 14.7456 MHz)
•UART register sets compatible with 16C550
•64 Byte First-in/First-out (FIFO) per channel
•Full PCI compatibility (32-bit/33 and 66 MHz PCI capable)
•Signaling characteristics of each channel pair (RS232/RS422/RS485)
configured with software
•Two Input/Output (I/O) routings:
oSixteen ports front connection
oSixteen ports rear (J4) connection
NOTE
*Customer may specify the speed of the Crystal.
Software Support
Abaco provides full software support for all of the popular software environments
(e.g., VxWorks®, LynxOS®, Windows NT®, SolarisTM). Each driver has been
developed specifically for the real-time data acquisition market.
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6PMC423* Port Serial, Front/Rear I/O Publication No. RX-URMH 006 Rev. E.0
Safety Summary
The following general safety precautions must be observed during all phases of the
operation, service and repair of this product. Failure to comply with these
precautions or with specific warnings elsewhere in this manual violates safety
standards of design, manufacture and intended use of this product.
Abaco assumes no liability for the customer's failure to comply with these
requirements.
Ground the System
To minimize shock hazard, the chassis and system cabinet must be connected to an
electrical ground. A three-conductor AC power cable should be used. The power
cable must either be plugged into an approved three-contact electrical outlet or used
with a three-contact to two-contact adapter with the grounding wire (green) firmly
connected to an electrical ground (safety ground) at the power outlet.
Do Not Operate in an Explosive Atmosphere
Do not operate the system in the presence of flammable gases or fumes. Operation of
any electrical system in such an environment constitutes a definite safety hazard.
Keep Away from Live Circuits
Operating personnel must not remove product covers. Component replacement and
internal adjustments must be made by qualified maintenance personnel. Do not
replace components with power cable connected. Under certain conditions,
dangerous voltages may exist even with the power cable removed. To avoid injuries,
always disconnect power and discharge circuits before touching them.
Do Not Service or Adjust Alone
Do not attempt internal service or adjustment unless another person capable of
rendering first aid and resuscitation is present.
Do Not Substitute Parts or Modify System
Because of the danger of introducing additional hazards, do not install substitute
parts or perform any unauthorized modification to the product. Return the product
to Abaco for service and repair to ensure that safety features are maintained.
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Publication No. RX-URMH 006 Rev. E.0 Contents 7
Contents
1 • Handling and Installation....................................................................................................... 10
1.1 Handling Precautions ......................................................................................................................................... 10
1.2 Unpacking Procedures........................................................................................................................................ 10
1.3 Installation ........................................................................................................................................................... 11
1.4 Front Panel Connectors and Indicators............................................................................................................. 12
1.5 I/O Signal Pinouts ............................................................................................................................................... 14
1.5.1 RS485 Support (SW2-SW12) ..........................................................................................................................................16
2 • Theory of Operation................................................................................................................ 18
2.1 PMC423 Block Diagram...................................................................................................................................... 18
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8PMC423* Port Serial, Front/Rear I/O Publication No. RX-URMH 006 Rev. E.0
List of Tables
Table 1-1 I/O Signal Pinouts PMC423 .......................................................................................................................... 14
Table 1-2 RS485 Support Switches (SW2-SW12)........................................................................................................ 16
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Publication No. RX-URMH 006 Rev. E.0 List of Figures 9
List of Figures
Figure 1-1 Installation of PMC Module......................................................................................................................... 11
Figure 1-2 Front Panel Connectors and Indicator ....................................................................................................... 12
Figure 1-3 PIM422.......................................................................................................................................................... 13
Figure 1-4 Default Switch Settings ............................................................................................................................... 17
Figure 2-1 PMC423 Block Diagram............................................................................................................................... 18
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10 PMC423* Port Serial, Front/Rear I/O Publication No. RX-URMH 006 Rev. E.0
1 • Handling and Installation
1.1 Handling Precautions
CAUTION
Handle the board by the edges or front panel only.
Electronic assemblies use devices that are sensitive to static discharge. Some of the
components assembled on Abaco Systems products may be sensitive to electrostatic
discharge and damage may occur on boards that are subjected to a high energy
electrostatic field. Observe anti-static procedures when handling these boards. All
products should be in an anti-static plastic bag or conductive foam for storage or
shipment. Work at an approved anti-static workstation when unpacking boards.
When the board is placed on a bench for configuring, etc., it is suggested that
conductive material be inserted under the board to provide a conductive shunt.
Unused boards should be stored in the same protective boxes in which they were
shipped.
1.2 Unpacking Procedures
Any precautions found in the shipping container should be observed. All items
should be carefully unpacked and thoroughly inspected for damage that might have
occurred during shipment. The board(s) should be checked for broken components,
damaged printed circuit board(s), heat damage and other visible contamination. All
claims arising from shipping damage should be filed with the carrier and a complete
report sent to Abaco Technical Support.
Remove the PMC423 from the shipping box and anti-static packaging. Verify that it
is not damaged and that all items are present by referring to the packing list.
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Publication No. RX-URMH 006 Rev. E.0 Handling and Installation 11
1.3 Installation
The PMC module is now ready for installation. Installation is done generically as
with the commercial versions of the card. Follow any specific procedures
recommended by the manufacturer of the chassis used. Perform the following steps:
1. Turn all system power OFF.
2. Remove the host board from the chassis (if currently installed).
3. Locate the PMC connectors on the host board.
4. Carefully plug the PMC module into the mating connectors on the host’s
printed circuit board.
5. Make sure the PMC module is seated properly into the common mezzanine
card (CMC) connectors on the host.
6. Use screws to fasten PMC to the host CMC.
7. Remove the four screws from the bottom of the stand-offs of the PMC.
8. Lineup the J1 and J2 connectors on the host CMC to the J1 and J2 connectors
on the PMC.
9. Ensure all connectors are properly aligned before pushing the connectors
together.
10. Use the four screws to connect the PMC stand-offs to the host CMC.
11. The chassis may now be powered up.
Refer to Figure 1-1 below:
Figure 1-1 Installation of PMC Module
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12 PMC423* Port Serial, Front/Rear I/O Publication No. RX-URMH 006 Rev. E.0
1.4 Front Panel Connectors and Indicators
The front panel connector is a high-density, small computer system interface (SCSI)
female connector, AMP part number AMP-796055-1.
Figure 1-2 Front Panel Connectors and Indicator
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Publication No. RX-URMH 006 Rev. E.0 Handling and Installation 13
Figure 1-3 PIM422
TOP BOTTOM
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14 PMC423* Port Serial, Front/Rear I/O Publication No. RX-URMH 006 Rev. E.0
1.5 I/O Signal Pinouts
Each serial port has two control signals:
•TX - Transmitted Data
•RX - Received Data
To support differential signaling standards (e.g., RS422), each signal has a positive
and negative line. When using a single ended standard (e.g., RS232), use the negative
version.
All I/O signals are available both at the front panel connector and on the J4
“backplane” connector. The following table details all connections.
Table 1-1 I/O Signal Pinouts PMC423
Port Signal
Front Panel Pin J4 Pin
Positive Negative Positive Negative
1 RX 2 1 2 1
TX
4
3
4
3
2 RX 6 5 6 5
TX 8 7 8 7
3 RX 11 10 10 9
TX 13 12 12 11
4 RX 15 14 14 13
TX 17 16 16 15
5 RX 19 18 18 17
TX 21 20 20 19
6 RX 23 22 22 21
TX 25 24 24 23
7 RX 28 26 26 25
TX 30 29 28 27
8 RX 32 31 30 29
TX 34 33 32 31
9 RX 36 35 34 33
TX 38 37 36 35
10 RX 40 39 38 37
TX 42 41 40 39
11 RX 45 44 42 41
TX 47 46 44 43
12 RX 49 48 46 45
TX 51 50 48 47
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Publication No. RX-URMH 006 Rev. E.0 Handling and Installation 15
Port Signal
Front Panel Pin J4 Pin
Positive Negative Positive Negative
13 RX 53 52 50 49
TX 55 54 52 51
14 RX 57 56 54 53
TX 59 58 56 55
15 RX 62 60 58 57
TX 64 63 60 59
16 RX 66 65 62 61
TX 68 67 64 63
NOTE
Ground is available on the front panel connector on pins 9, 27, 43 and 61.
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16 PMC423* Port Serial, Front/Rear I/O Publication No. RX-URMH 006 Rev. E.0
1.5.1 RS485 Support (SW2-SW12)
These switches are used when running a port in RS485 signaling mode. When
running RS485 (half duplex), the three switches associated with the port should be
Closed. In all other signaling modes, the switches should be Open (see table below
for port/switch position assignments).
NOTE
The use of RS485 requires use of the correct software interface. Consult the driver manual for the operating
system used for details.
As shipped from factory, all switches are in the Open state.
Table 1-2 RS485 Support Switches (SW2-SW12)
Port
1 SW1:1 SW2:1 SW9:1
2 SW1:2 SW2:2 SW9:2
3 SW1:3 SW2:3 SW9:3
4 SW1:4 SW2:4 SW9:4
5 SW3:1 SW4:1 SW10:1
6 SW3:2 SW4:2 SW10:2
7 SW3:3 SW4:3 SW10:3
8 SW3:4 SW4:4 SW10:4
9 SW5:1 SW6:1 SW11:1
10 SW5:2 SW6:2 SW11:2
11 SW5:3 SW6:3 SW11:3
12 SW5:4 SW6:4 SW11:4
13 SW7:1 SW8:1 SW12:1
14 SW7:2 SW8:2 SW12:2
15 SW7:3 SW8:3 SW12:3
16 SW7:4 SW8:4 SW12:4
Where SW3:4 means Switch pack 4, switch 4, etc.
NOTE
The above applies to the Rev. D and later revisions of the board. For earlier revisions, please e-mail:
[email protected]
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Publication No. RX-URMH 006 Rev. E.0 Handling and Installation 17
Figure 1-4 Default Switch Settings
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18 PMC423* Port Serial, Front/Rear I/O Publication No. RX-URMH 006 Rev. E.0
2 • Theory of Operation
This chapter provides information for local device connections, the bridge to the host
PCI and the general system's function. The design of the PMC423 is illustrated in the
block diagram that follows.
2.1 PMC423 Block Diagram
Figure 2-1 PMC423 Block Diagram
The PMC423 can operate with the 32-bit 33/66-MHz PCI bus, +3.3 V or +5 V PCI
signaling. This allows for the maximum flexibility for the different PCI bus speeds
and signaling. The signaling level for the serial communication (RS232, RS422, etc.) is
configured via the software. The card generates the necessary voltage for the serial
signaling onboard using the +5 V supply. This allows the PMC423 to operate from
the +3.3 V and +5 V supply only.
There are two eight-port serial devices that are after the PCI to PCI bridge for a total
of sixteen ports. Due to the density of the serial ports, the hardware handshake
signals have not been routed to the front or the rear of the card.
PCI/PCI Bridge
Host PCI
8 Port Serial
L
Lo oc
ca
al lP PC CI IB Bu
us s
Signal
8 Port Serial
Signal Signal
Condi tioningSignal
1
Port 23 4 5 6 16
15
141378 9 10 11 12
Port
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Publication No. RX-URMH 006 Rev. E.0 Theory of Operation 19
The PMC423 is a flexible solution for integrating multiple serial I/O channels onto a
Single Board Computer (SBC). Efficiently packaging sixteen channels onto a single
PMC makes effective use of the few PMC locations available. Routing I/O to the rear
(via the ‘J4’ connector to the host card) enhances flexibility in developing
economical, and non-intrusive cabling solutions. Each serial port is implemented
with an independent UART (Asynchronous Receiver and Transmitter) with a
separate programmable baud rate. Accessing the UART controllers via PCI
integrates more effectively to modern SBC implementations than proprietary or
legacy devices.
Traditional UART controllers are limited to 8-bit access, incurring all bus protocol
overhead for every character transferred (and control operations). The Octal UART
utilized on the PMC423 supports 32-bit transfers, allowing four characters to be
transferred in a single bus operation. Reducing programmed I/O operations is
critical to achieving good performance in PCI systems.
While the extended transfer options offer an opportunity to maximize performance,
in many cases, the first (and sometimes only) criteria are software development and
integration. The 16C550 register set definition is in common usage for serial I/O
devices in all environments. Maintaining compatibility with this de facto standard
can markedly reduce the time required to integrate the PMC423 into existing
software environments. Having the software integration based upon earlier drives
reduces the risk of unexpected (and undesirable) changes in application interfaces,
which can be critical when creating an evolutionary improvement of existing
systems.
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