UHF-Reader
Manual
ID ISC.ANT.U500/270 - DM
FEIG ELECTRONIC GmbH
Page 21 of 117
H71011-0e-ID-B.docx
7. Configuration Parameters
The configuration memory of the Reader is organized in configuration blocks of 16 byte each. The-
se are divided into 14 byte configuration parameters and a 2 byte CRC16 checksum. Each of these
configuration blocks takes a number (CFG 0...CFG n).
Structure of a configuration block in Reader configuration memory and Reader EEPROM (CFG):
Byte
0
1
2
3
4
5
6
7
8
9
10 11 12 13 14 15
Contents
PARAMETER
CRC16
The parameters are stored in two different configuration memory locations:
Reader RAM
Backup EEPROM (used for storing parameter over power down)
Multiple configuration memory locations can be addressed by the value of the parameter CFG-
ADR.
CFG-ADR:
CFGn:
memory-address of the required configuration block
LOC:
specifies the location of the configuration block (RAM / EEPROM)
MODE:
specifies one or all configuration blocks
Bit
7
6
5
4
3
2
1
0
Function
LOC
MODE
CFGn: address of configuration block
The EEPROM configuration blocks are protected by a 16 bit CRC-checksum. The examination of
these checksums is executed after each reset of the Reader. If a checksum error is found, the
Reader goes into an error status "EE-Init-Mode" and sets the configuration block which is faulty to
the default-values.
While the EE-Init-Mode is active, the LED blinks alternately red and green and the Reader answers
external commands with the status "0x10 EEPROM Failure". The "EE-Init-Mode" can be exited
now by a new reset (cold start or
command
).
If after this the checksums
of all data records are correct, the Reader shifts to the configured operation mode.
NOTE:
Malfunctions may occur if parameters are configured outside their described range or if
unspecified parameters have been changed!
A downgrade of the firmware will result in a complete reset of the EEPROM. All parameters
will be reset to factory default.
