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