7.1.2.
SET_PROTOCOL
This command is used to control the line speed of the communication channel between BioCARDKey
reader and host device. The line speed of the communication is controlled by two factors, namely, the
Delay Factor and the Baud Rate.
Command format
Instruction
Code
Data length
Data
DELAY N
03
H
01
H
To change only the Delay Factor (for RS232 reader only), or
Instructi
on Code
Data
length
Data
DELAY N
BAUD RATE
03
H
02
H
to change the Delay Factor and the Baud Rate (for RS232 reader only).
DELAY
Determines the time delay inserted by the BioCARDKey between two consecutive
bytes sent in order to adapt to slower host system speeds. The time delay is given by
N * 0.1msec, with N ranging from 0 ... 255 (00 - FF
H
). The default value is N = 0
(delay changes only valid on RS232 reader).
BAUD RATE
Selects the baud rate (bps) of the serial interface between reader and host system.
The default hardware baud rate is 9600 bps. (Baud rate changes are only valid on
RS232 reader).
BAUD RATE
Serial Baud Rate
(bps)
12
H
9600
11
H
19200
10
H
38400
03
H
14400
02
H
28800
01
H
57600
00
H
115200
Response data format
No
response
data
The new protocol becomes effective by the completion of the
SET_PROTOCOL
command,
immediately
after the BioCARDKey has sent out the response string to the SET_PROTOCOL
command
.
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AET60 Reference Manual
Version 1.7
Page 16 of 24
www.acs.com.hk
