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Quatech CompactFlash Card User’s Manual 

 

SSCF-200/300 

 

- 8 - 

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 

 

 
 

 
 

 
 

 
 

 

 
 

 

Содержание SSCF-200

Страница 1: ...arkway 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 SSCF SSCF 200 300 200 300 One Port...

Страница 2: ...ndows 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...

Страница 3: ...OS 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 Thro...

Страница 4: ...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...

Страница 5: ...ns 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 C...

Страница 6: ...ctor on the supplied cable the cable is pinned one to one PIN NAME FUNCTION 1 RXD Receive Data inverting input 2 RXD Receive Data non inverting input 3 TXD Transmit Data inverting output 4 TXD Transmi...

Страница 7: ...te 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 guarante...

Страница 8: ...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...

Страница 9: ...n the cable To prevent reception of these data bits the SSCF 200 300 receiver inputs incorporate 1 2k bias resistors one pulling up on and one pulling down on that ensure that the differential voltage...

Страница 10: ...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 conn...

Страница 11: ...ir MUST be assigned a Returned Material Authorization RMA number prior to shipment This RMA number must be clearly marked on the exterior of the product s return packaging and in any correspondence to...

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