HID Global Corporation 5553 Manuale Utente
1508-USM-00-0-04
HF Multi ISO RFID Reader User Manual, Firmware V1.4
2.2.5 BAUD, Baud Rate Control Register (0Ch)
Default = 00h
The baud rate register defines the communication speed of the reader device.
Baud rate register
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
RFU RFU RFU RFU RFU BS2 BS1 BS0
This register defines the baud rate of the device.
BS2
BS1
BS0
Baud rate
0
0
0
9600 baud (default)
0 0 1 19200
baud
0 1 0 38400
baud
0 1 1 57600
baud
1 0 0 115200
baud
1
0
1
230400 baud (depends on the used interface chip)
1
1
0
460800 baud (depends on the used interface chip)
With the high baud rates (230400 and 460800 baud), proper operation depends on the interface
chip used. Please note that some of the interface chips available do not support these high baud
rates.
chip used. Please note that some of the interface chips available do not support these high baud
rates.
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 %
The following table describes the communication settings.
Description
8 data bits
No parity bit
1 stop bit
No flow control
2.2.5.1
CF Card Version
The Baud rate of the CF Card version is limited to 115200 baud. 230400 and 460800 are not
supported.
supported.
Page 28 of 144
August 2010
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