Quatech SSCF-200 Manual de usuario

QUATECH, INC.

5675 Hudson Industrial Parkway

Hudson, Ohio 44236

TEL: (330) 655-9000

FAX: (330) 655-9010

http://www.quatech.com.

CompactFlash Card

User’s Manual P/N: 940-0190-110

Version 1.10, 02.05.04

User’s Manual

SSCFSSCF--200/300200/300

One Port RS-422/485 Serial

CompactFlash Card

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are reserved. The information contained in this document cannot be

reproduced in any form without the written consent of Quatech, Inc.

Likewise, any software programs that might accompany this

document can be used only in accordance with any license

agreement(s) between the purchaser and Quatech, Inc. Quatech Inc.

reserves the right to change this documentation or the product to

which it refers at any time and without notice.

CompactFlash is a trademark of Sandisk Corporation. IBM®, PC®,

and PC-AT® are trademarks of the International Business Machines

Corporation. Windows®, Windows 95®, Windows 98®, Windows

NT®, Windows 2000®, Windows Me®, Windows XP®, Windows CE®

and MS-DOS® are trademarks of the Microsoft Corporation. All other

trademarks or registered trademarks are property of their respective

owners.

The authors have taken due care in the preparation of this document

and every attempt has been made to ensure its accuracy and

completeness. In no event will Quatech, Inc. be liable for damages of

any kind, incidental or consequential, in regard to or arising out of

the performance or form of the materials presented herein or in any

software program(s) that may accompany this document.

Changes or modifications to this device not explicitly approved by

Quatech will void the user's authority to operate this device.

Quatech, Inc. encourages and appreciates feedback concerning this

document. Please send any written comments to the Technical

Support department at the address listed on the cover page of this

manual.

Trademarks

Disclaimer

Feedback

Quatech CompactFlash Card User’s Manual SSCF-200/300

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Table of contents

1. Overview---------------------------------------------------------------------------------------------------4

2. About The SSCF-200/300------------------------------------------------------------------------------4

3. Installing The SSCF-200/300-------------------------------------------------------------------------5

3.1 Windows CE, PocketPC-------------------------------------------------------------------------5

3.2 Windows 95, 98, Me, 2000, XP ----------------------------------------------------------------5

3.3 DOS & Windows 3.x -----------------------------------------------------------------------------5

4. SSCF-200/300 Register Interface--------------------------------------------------------------------5

5. Hardware Specification --------------------------------------------------------------------------------6

5.1 Pinout -----------------------------------------------------------------------------------------------6

5.2 Electrical--------------------------------------------------------------------------------------------7

5.3 Power Consumption -----------------------------------------------------------------------------7

5.4 Mechnaical-----------------------------------------------------------------------------------------7

5.5 Environmental ------------------------------------------------------------------------------------7

5.6 Notes on Serial Data Throughput------------------------------------------------------------8

5.7 Baud Rate Settings ---------------------------------------------------------------------------------8

6. Using The SSCF-200/300------------------------------------------------------------------------------9

6.1 Termination----------------------------------------------------------------------------------------9

6.2 Fail Safe Open Circuit Protection------------------------------------------------------------9

6.3 TxD and RTS Drivers ---------------------------------------------------------------------------9

6.4 RS-422 Operation------------------------------------------------------------------------------- 10

6.5 RS-485 Operation------------------------------------------------------------------------------- 10

7. Warranty-----------------------------------------------------------------------------------------------------11

Quatech CompactFlash Card User’s Manual SSCF-200/300

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1. Overview

The SSCF-200/300 card is a single port RS-422/485 Serial CompactFlash card with the following

features:

•Type I CompactFlash form factor for CF+ equipped PDAs, Handheld, Laptop, & Tablet PCs

Windows 95/98/Me/2000/XP/CE, PocketPC, DOS compatible using O.S. standard drivers

•Industry standard 16550 register set.

•Transmission rates up to 115.2K Baud as standard.

•Switchable x1 or x8 baud rate providing up to 921Kbaud.

•Compatible with 3.3V and 5V systems.

•Hardware modem control line support.

•Compatible with standard PCMCIA slots using CompactFlash Adapter (not included)

•Standard PC IO port decode for COM1 to COMn

•“Any” IO port and interrupt decode option for best PNP flexibility

•ESD protected RS-422/485 drivers

•Software controlled power management

•Low power consumption

•Supplied with 300mm DB9-male terminated cable

2. About the SSCF-200/300

The SSCF-200/300 is a RS-422/485 serial card with a 16550 compatible UART ASIC device. The

serial data and control lines are buffered using ESD protected RS-422/485 drivers.

Industry standard baud rates up to 115.2K baud are supported, together with 16-byte deep TX and

RX FIFOs. A small switch located at the back edge of the card can be used to select a “x1” or “x8”

baud rate multiplier. This feature enables up to 921KBaud operation without requiring special

device drivers on the host (in x8 mode you simply multiply the setting shown on the host by 8 to get

the real serial data rate e.g. 19200 Baud set on host with x8 mode gives 153600Baud true rate in

hardware). See section 5 for the switch settings.

The SSCF-200/300 conforms to the industry standard CompactFlash+ interface that allows

connection of peripherals to the system bus of a laptop, handheld PC or PDA. The CF+ specification

extends the earlier memory-only CompactFlash interface to enable the use of I/O devices and to

provide the extra power required by I/O cards. The SSCF-200/300 is an I/O type device and therefore

requires a CF+ capable slot.

Quatech CompactFlash Card User’s Manual SSCF-200/300

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3. Installing the SSCF-200/300

3.1 Windows CE, PocketPC

There is no need to install any software for Windows CE or PocketPC. Simply insert the SSCF-

200/300 card and it will appear in a list when you set up a “Connection.”For more information about

setting up a “Connection” see the manual for your handheld device.

3.2 Windows 95, 98, 98SE, Me, 2000, XP

The “generic” serial drivers in these Operating Systems support the SSCF-200/300. Before inserting the card,

however, execute the SERIALSETUP.EXE program provided on the Quatech Data Communication CD in the

Serial Port Adapters\Drivers\Windows 95, 98, Me, 2000, XP for CompactFlash directory.

3.3 DOS & Windows 3.1x

Operation in DOS or Windows 3.1 requires 3rd party Card and Socket Services drivers to be properly

installed and configured. Follow your software vendor’s instructions on how to do this.

The SSCF-200/300 requires no extra drivers to operate in DOS. Insertion of the card should create a

familiar “happy beep” as the host software configures the card as a standard DOS COM port.

Resource allocation and troubleshooting is all related to the 3rd party software and any issues that

may arise during configuration should be addressed to the vendors of this software. The SSCF-

200/300 has been tested with: SystemSoft Cardware and Award Cardwizard

4. SSCF-200/300 Register Interface

For reference, the SSCF-200/300 behaves as a 5V card to the host system because Vs1 and Vs2 pins

are not connected. This is to make the host default to 5V when possible, giving the highest RS-

422/485 output signals and therefore the best noise margins. The Card Information Structure (CIS)

does not define any 3.3V tuples because some platforms will also take this as a sign to run at 3.3V

even when 5V is available. On a PDA or HPC, the host will power the card at 5V if it is available, or

at 3.3V if that is the only option (despite there being no 3.3V tuple entries).

Quatech CompactFlash Card User’s Manual SSCF-200/300

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5. Hardware Specification

5.1 PINOUT

The SSCF-200/300 is supplied with a 300mm long Type 46 cable that terminates with a DB9 Male

connector with female screwlocks (to match the port at the back of a PC)

The pin-out below applies to both the SSCF-200/300 card and the DB9 male connector on the

supplied cable (the cable is pinned one-to-one).

PIN NAME FUNCTION

1* RXD-Receive Data inverting input

2RXD+ Receive Data non-inverting input

3TXD-Transmit Data inverting output

4TXD+ Transmit Data non-inverting output

5GND GROUND

6CTS-Clear To Send inverting input

7RTS-Request To Send inverting output

8CTS+ Clear To Send non-inverting input

9RTS+ Request To Send non-inverting output

For ref: mating connector type: Honda rmc-e9f2s-bsla2n-a2

*Pin 1 is nearest the edge of the card.

Baud multiplier switch

PIN 9 PIN 1

Quatech CompactFlash Card User’s Manual SSCF-200/300

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5.2 ELECTRICAL

All figures quoted are typical parameters @ 25°C

ESD PROTECTION: All RS-422/485 signal lines on the SSCF-200/300 card are protected

against electrostatic discharge (ESD)

•>1kv –IEC1000-4-4

UART CLOCK SPEED: x1: UART CLOCK is 1.8432MHz ->115.2KBaud max

x8: UART CLOCK is 14.7456MHz->921.6KBaud max

RS-422 MODE: CTS/RTS flow control signals available.

RS-485 MODE: Auto-tristate of TXD drivers when not transmitting

TERMINATORS: None fitted in card, use an external termination resistor as required.

FAIL-SAFE FEATURE: The receiver inputs include a fail-safe feature that guarantees a logic

high on the receiver when the inputs are open circuit.

5.3 POWER CONSUMPTION

All figures quoted are typical parameters @ 25°C

COMMUNICATION ACTIVE: 80mA typical @ 5V, 55mA typical @ 3.3V

(includes 45mA consumed by terminating resistors)

IDLE MODE : 22mA typical @ 5V, 10mA typical @ 3.3V

5.4 MECHANICAL

MASS: 10g typical.

FORM FACTOR: 36.4mm x 42.8mm x 3.3 mm overall size

5.5 ENVIRONMENTAL

HUMIDITY: <80% non-condensing

TEMP: 0-50°C ambient

Quatech CompactFlash Card User’s Manual SSCF-200/300

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5.6 NOTES ON SERIAL DATA THROUGHPUT

The maximum serial baud rate of 921KBits/sec does not imply that the maximum sustained

throughput rate of the serial port will be as high. The actual throughput rate that can be achieved

depends on many factors including the host PC speed, the serial data source’s data block size and

whether the block are “back-to-back”, whether the interrupt in use on the host is being shared by

other devices leading to increased latency, etc.

As a simple rule of thumb, using the standard serial drivers on a fast PC will allow throughput rates

of 400-600KBits/sec although these rates can’t be guaranteed and will be application specific.

5.7 BAUD RATE SETTINGS

The table below illustrates the common baud rate values available for each of the baud rate

multiplier switch positions:

HOST SETTING SWITCH = x1 SWITCH = x8

300 300 2400

1200 1200 9600

2400 2400 19200

4800 4800 38400

9600 9600 76800

19200 19200 153600

38400 38400 307200

57600 57600 460800

115200 115200 921600

Quatech CompactFlash Card User’s Manual SSCF-200/300

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6. Using the SSCF-200/300 Card

6.1 TERMINATION

RS-422 and RS-485 lines should be terminated at the end of the main branch of the receiver with the

cables characteristic impedance. These terminating impedances reduce signal reflections at the cable

end. It is not necessary to terminate the transmitter end of the cable. The most common method of

termination is to install a terminating resistor, typically with a value of 120Ω, at a single receiver.

The SSCF-200/300 does not have internal terminating resistors fitted as standard. If required, a

120Ωresistor should be connected between the RXD+ and RXD-pins of the DB9 connector. For RS-

422 applications, a terminating resistor will also be required between the CTS+ and CTS-pins.

6.2 FAIL SAFE OPEN CIRCUIT PROTECTION

A transmission line enters an indeterminate state if no drivers are transmitting on it or the line has

been cut. This indeterminate state can cause the receivers to receive invalid data bits from noise

picked up on the cable. To prevent reception of these data bits, the SSCF-200/300 receiver inputs

incorporate 1.2kΩbias resistors (one pulling up on “+” and one pulling down on “-“) that ensure that

the differential voltage on the RXD and CTS pairs is greater than the 200mV input logic “1”

threshold (even in the presence of an external 120Ωterminating resistor).

6.3 TXD AND RTS DRIVERS

The RTS signal driver on the SSCF-200/300 is always enabled, regardless of the mode in which the

card is to be used.

The SSCF-200/300 incorporates an auto-tristate feature on the TXD signal driver. The driver is

enabled only when data is in the process of being transmitted. This mechanism can prevent bus

contention in RS-485 systems (caused by multiple transmitters driving the line in opposing states).

The RS-485 transmitter arbitration scheme is beyond the scope of this guide, and is typically

handled by application software.

Note that when multiple characters are transmitted “back-to-back” the output drivers stay active for

the entire duration of the transmission i.e. the drivers do not go in and out of tri-state for each

character in a multi-character block. The auto-tristate feature is always in operation, regardless of

the mode in which the card is to be used.

Quatech CompactFlash Card User’s Manual SSCF-200/300

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6.4 RS-422 OPERATION

Generally, in RS-422 systems, all 8 signal lines from the DB9 connector are used. Thus 4 twisted

pair cables are used, one pair for each of the 4 signals TXD, RXD, RTS and CTS. The RS-422

arrangement allows data to be transmitted and received simultaneously since each signal has its

own twisted pair.

6.5 RS-485 OPERATION

The SSCF-200/300 can be used for both half-duplex (one twisted pair) and full-duplex (two twisted

pairs) arrangements, however for half-duplex mode, the link between the TXD and RXD signals

must be made externally on the DB9 connector. Also, it should be noted that the transmitted

characters will always be received in this mode. The RXD receiver is not disabled during

transmission.

The handshaking signals RTS and CTS, although driven by the card, are usually not connected to

another node. However, if required by the application software, to force the CTS signal input on the

SSCF-200/300 true, the RTS signals must be looped back to the CTS inputs.

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