User's Manual

ACG HF Multi ISO RFID Reader V1.0
ACG Identification Technologies GmbH 52
The following table describes the exact baud rates used by the reader.
Baud rate Exact baud rate Difference
9600 baud 9603 baud 0.03 %
19200 baud 19207 baud 0.04 %
38400 baud 38305 baud -0.25 %
57600 baud 57458 baud -0.25 %
115200 baud 114915 baud -0.25 %
230400 baud 233793 baud 1.47 %
460800 baud 452000 baud -1.91 %
Figure 12-11: Exact baud rates
The following table describes the communication settings
Description
8 data bits
No parity bit
1 stop bit
No flow control
Figure 12-12: Communication settings
12.3.5.1 CF Card Version
The Baud rate of the CF Card version is limited to 115200 baud. 230400 and 460800
are not supported.
12.3.6 Command Guard Time (0Dh)
The Command Guard Time is used to ensure that commands are not sent to fast
consecutively. Following commands are sent after the guard time is elapsed. One
time slice is around 37,8us. The longest timeout value is 9,6ms (FFh).
The default value is 20h (1,2ms).