WinSystems PCM-DSPIO User manual

OPERATIONS MANUAL
PCM-DSPIO
PCM-J1708
WinSystems reserves the right to make changes in circuitry
and specifications at any time without notice.
© Copyright 1996 WinSystems®. All Rights Reserved.

REVISION HISTORY
P/N 403-0247-000
ECO Number Date Code Revision
ORIGINATED 960508 A
98-88 980826 A1
98-105 981117 A2
WinSystems- "The Embedded Systems Authority"

TABLE OF CONTENTS
Section Paragraph Title Page
Visual Index – Quick Reference
1 General Information 1-1
1.1 Features 1-1
1.2 General Description 1-1
1.3 Specifications 1-2
2 PCM-DSPIO Technical Reference 2-1
2.1 Introduction 2-1
2.2 Serial I/O Address Selection 2-1
2.3 Serial Interrupt Selection 2-2
2.4 RS- 232 Mode Configuration 2-2
2.5 RS- 422 Mode Configuration 2-3
2.6 RS- 485 Mode Configuration 2-5
2.7 SAE J1708 Mode Configuration 2-7
2.8 Parallel Port I/O Address Selection 2-8
2.9 Parallel Port Direction Control 2-9
2.10 Parallel Port Interrupt Routing Selection 2-9
2.11 Parallel Port I/O Connector Pinout 2-9
2.12 PC/104 Bus Connectors 2-10
2.13 Connector/Jumper Summary 2-11
APPENDIX

Visual Index – Quick Reference
For the convenience of the user, a copy of the Visual Index has been provided with direct links to
connector and jumper configuration data.
J1
SERIAL I/O
CONNECTOR
J2 , J3
CHANNEL 2 RS-485/J1708
CONFIGURATION JUMPER
J5, J6
CHANNEL 1 RS-485/J1708
CONFIGURATION JUMPER
J4
PARALLEL PORT
I/O CONNECTOR
J8
PARALLEL PORT
BI-DIRECTIONAL MODE
CONTROL JUMPER
J9
SERIAL I/O MAP
SELECTION JUMPER
J10
PARALLEL PORT
I/O ADDRESS
SELECTION JUMPER
J7
INTERRUPT ROUTING
HEADER
J11
PC/104 8-BIT
BUS CONNECTOR
J12
PC/104 16-BIT
BUS CONNECTOR
981117 PCM-DSPIO/J1708 OPERATIONS MANUAL

1GENERAL INFORMATION
1.1FEATURES
nPC/104 compliant dual serial/parallel I/O module
nTwo fully 16550 compatible async serial channels
nA fully compatible Centronics parallel port
n16-byte serial transmit/receive FIFO
nFull RS-232 Modem control line support
nProgrammable Baud rates from 50 to 115,200 bps
nFour Jumper selectable serial I/O maps
nTwo jumper selectable Parallel port addresses
nSupports optional RS-422, RS-485, and SAE J1708 on both channels
nDual mode bi-directional parallel printer port
n+5 Volt only operation
n-40° to +85° C operating temperature range
1.2GENERAL DESCRIPTION
ThePCM-DSPIOisasmalllow-cost,add-onmoduleforPC/104basedsystemsthatpro-
videstwoPC compatibleserial portsand aPCcompatibleparallelprinterport. Both serial
channels come standard supporting RS-232 including all standard Modem control lines.
Eitherorbothchannelscanoptionallybeconfigured for RS-422orRS-485interfaceleve ls.
A factory configured option allows for support of SAE J1708 on both serial channels. The
programmable 16-byte transmit and receive FIFOs allow for multiple channels of high
speed serial I/O without excessive processor bottlenecking. The PC compatible parallel
port can be used as a primary or secondary printer port or can be used for general purpose
digital I/O with its bi-directional capability.
981117 PCM-DSPIO/J1708 OPERATIONS MANUALPage 1-1

1.3SPECIFICATIONS
1.3.1 Electrical
Bus Interface : PC/104 8-Bit (optional 16-bit connector available for expanded interrupt capability)
VCC : +5V +/-5% @ 90mA. typ. all channels RS-232
120ma typ. all channels RS-422
I/O Addressing : PLD Controlled I/O address uses 10-bit address. Each serial channel requires 8
consecutive I/O port addresses.
Parallel port requires 4 consecutive I/O port addresses.
1.3.2Mechanical
Dimensions : 3.8" X 3.8" X 0.5"
PC Board : FR4 Epoxy Glass, with 2 signal layers with screened component legend,and plated
through holes.
Jumpers : 0.025" square posts on 0.10" centers
Serial I/O Connector : 20 pin 0.10" grid RN type IDH-20-LP
Parallel I/O Connector : 26 pin 0.10" grid RN type IDH-26-LP
1.3.3Environmental
Operating Temperature : -40° to +85°C
Non-Condensing Relative Humidity : 5% to 95%
Page 1-2PCM-DSPIO/J1708 OPERATIONS MANUAL981117
WinSystems- "The Embedded Systems Authority"

2PCM-DSPIO TECHNICAL REFERENCE
2.1Introduction
This section of the manual is intended to provide sufficient information regarding the
configuration and usage of the PCM-DSPIO module. WinSystems maintains a Technical
SupportGroup to helpanswerquestionsregarding configuration and programming of the
board.For answers to questions not adequately addressed in this manual, contact Techni-
cal Support at [phone] between 8AM and 5PM Central Time. Technical support
may also be requested via FAX at [phone]. Appendix C contains the complete re-
printoftheStartech16C552datasheetandisprovidedtotheprogrammerasasourceofin-
formation for all UART registers and parallel port register details.
2.2Serial I/O Address Selection
The PCM-DSPIOmapsthetwo serial channels to anyof 4 pairs ofaddresses as defined
in the illustration below.
981117 PCM-DSPIO/J1708 OPERATIONS MANUALPage 2-1
1 o o 2
3 o o 4
5 o o 6
7 o o 8
9 o o10
11 o o12
13 o o14
15 o o16
17 o o18
19 o o20
1 o o 2
3 o o 4
J9J7
Serial Address Select jumper J9
Interrupt Routing Header J7
1 o o2
3 o o4 1 o o2 3 o o4 1 o o2
3 o o4 1 o o2 3 o o4
J9J9J9J9
CH1 - 3F8H
CH2 - 2F8HCH1 - 3E8H CH2 - 2E8HCH1 - 3A8H CH2 - 2A8HCH1 - 380H CH2 - 280H

2.3Serial Interrupt Selection
Bothserialchannelscanbeprogrammed to generate interruptsonTransmitterempty,
Receive character ready, or Line status changes. Each channel's interrupt output can be
routedtoan IRQ pin onthePC/104 bus via the jumperblockat J7. Note that eachchannel
is repeated throughout the jumper block several times allowing access to most any of the
bus interrupts. Jumpers may be placed vertically or horizontally to route the serial inter -
rupt to the bus. The illustrationbelow shows the J7 header and its corresponding pin defi-
nitions.
2.4RS-232 Mode Configuration
Full RS-232 signal levelsare standard on both serial channels. The two serial channels
are terminated at J1 and a dual DB9 cable is available from WinSystems under part
number CBL-173-1. The following illustrations show the correct jumpering, driver IC in-
stallation,andDB9I/Oconnectorpin-outforRS-232oneachchannel.RefertoAppendixD
for pin definitions when not using the CBL-173-1 cable.
Page 2-2PCM-DSPIO/J1708 OPERATIONS MANUAL 981117
WinSystems- "The Embedded Systems Authority"
1 o o 2
3 o o 4
5 o o 6
7 o o 8
9 o o 10
11 o o 12
13 o o 14
15 o o 16
17 o o 18
19 o o 20
J7
CH1
IRQ3
CH1
IRQ5
CH1
IRQ10
CH1
IRQ12
CH1
LPT
IRQ2
CH2
IRQ4
CH2
IRQ7
CH2
IRQ11
CH2
IRQ15
CH2
1 o
2 o
3 o
U6U4
U2U1
U5U3
J6 J2
J3
J5
Serial configuration
jumpers J2, J3, J5, J6
RS-232 Line Drivers U1, U2
RS-422/RS-485/J1708
Line Drivers U3, U4, U5, U6
1 o
2 o
3 o
1 o
2 o
3 o
1 o
2 o
3 o

2.4.1Channel 1 - RS-232
2.4.2 Channel 2 - RS-232
2.5RS-422 Mode Configuration
RS-422 signal levels are supported on either or both serial channels with the installa-
tion of the optional “Chip Kit” part number CK-75176-2. This kit provides the driver ICs
necessary for a single channel of RS-422. If two channels of RS-422 are required then two
kit will be needed. RS-422 is a 4-wire point to point full-duplex interface allowing much
longer runs than are possible with RS-232. The differential transmitter and receiver
twisted-pairsoffera high degree of noiseimmunity.RS-422usuallyrequiresthat the lines
beterminatedatbothends.Thisterminationcanbeaccomplished eitheronthecableorby
installing resistors on the board in locationsreserved for them. The methodology in det er-
miningthe correct resistor values isbeyond the scope of this document but we recommend
trial values of 100 Ohms in all three locations at the receiver end. The following illustra -
tions show the correct jumpering, driver IC installation, DB-9 I/O connector pin-out, and
termination resistor locations for each of the channels when used in RS-422 mode.
981117PCM-DSPIO/J1708 OPERATIONS MANUALPage 2-3
WinSystems- "The Embedded Systems Authority"
1 o
2 o
3 o
U2 - Installed
U5 - Not Installed
U6 - Not Installed
1 o o6
2 o o7
3 o o8
4 o o9
5 o
J5 J6 CH1 DB9
Jumper PositionsDriver IC StatusI/O Connector Pin Defs
CD
RX Data
TX Data
DTR
GND
DSR
RTS
CTS
RI
1 o
2 o
3 o
U1 - Installed
U3 - Not Installed
U4 - Not Installed
1 o o6
2 o o7
3 o o8
4 o o9
5 o
J2 J3 CH2 DB9
Jumper PositionsDriver IC StatusI/O Connector Pin Defs
CD
RX Data
TX Data
DTR
GND
DSR
RTS
CTS
RI
1 o
2 o
3 o
1 o
2 o
3 o

2.5.1Channel 1 - RS-422
2.5.2 Channel 2 - RS-422
Page 2-4PCM-DSPIO/J1708 OPERATIONS MANUAL981117
WinSystems- "The Embedded Systems Authority"
U2 - Not Installed
U5 - Installed
U6 - Installed
1 o o6
2 o o7
3 o o8
4 o o9
5 o
J5 J6 CH1 DB9
Jumper PositionsDriver IC StatusI/O Connector Pin Defs
N/C
TX+
TX-
N/C
GND
RX+
RX-
N/C
N/C
1 o
2 o
3 o
1 o
2 o
3 o
U1 - Not Installed
U3 - Installed
U4 - Installed
1 o o6
2 o o7
3 o o8
4 o o9
5 o
J2 J3 CH2 DB9
Jumper PositionsDriver IC StatusI/O Connector Pin Defs
N/C
TX+
TX-
N/C
GND
RX+
RX-
N/C
N/C
1 o
2 o
3 o
1 o
2 o
3 o
RS-422NOTE : WhenusedinRS-422
modethe transmitter must be enabledvia
softwareby setting the RTS bitintheMo-
dem Control register (Bit 1).
RS-422NOTE :WhenusedinRS-422
modethe transmitter must be enabledvia
softwareby setting the RTS bitintheMo-
dem Control register (Bit 1).
R7
R5
R6
RX+
RX-
vcc
R10
R11
R12
RX+
RX-
vcc