HT-CM400 NXP Semiconductors, HT-CM400 Datasheet - Page 82

• Manufacturer Part Number: HT-CM400
• Description: Ht Cm400; Ht Rm440 Family; Ht Rm800 Family Interface Protocol Reader - Host
• Manufacturer: NXP Semiconductors

Transponders
4.1.3 Operation-Modes and Configuration
4.1.3.1 Modes of Operation
The HITAG 1 can be operated in following 2 modes that cannot be configured using the
Configuration Page, but via host-commands.
Standard Protocol Mode:
This mode is activated using the command GetSnr.
Advanced Protocol Mode:
This mode is activated using the command GetSnr_Adv.
Advanced Protocol Mode is not available for HITAG 1 transponders based on ASIC HT1 ICS30 01x
(only available for HITAG 1 transponders based on ASIC HT1 ICS30 02x).
Advanced Protocol Mode uses, above all, an additional Cyclic Redundancy Check (CRC) for read
operations.
4.1.3.2 Configuration
The Configuration Page consists of 4 Configuration Bytes, the first two bytes are used for
configuration, the other two bytes can be used freely.
The bitmaps in Configuration Bytes 0 and 1 determine the configuration of the memory, i.e. they
define which area is secret or public, r/w, ro, wo or neither read nor write.
You can allocate and write the Configuration Page until it is locked (Bit 4 of Configuration Byte
1 is set to ‘0’).
After that these bytes are read only bytes and the configuration of the transponder memory cannot
be changed any more.
ATTENTION: Once set to read only the Configuration Page cannot be changed back to
r/w again (transponder is hardware protected)!
If you change the configuration, you have to place the transponder directly on the
antenna or hold it directly to it (0-distance)! In order to avoid any errors do not move the
transponder during this write process and be sure that you are in a safe environment
without electrical noise.
Configuration Bytes 2 and 3: These two bytes, too, are set to read only by the OEM Lock Bit
(Configuration Byte 1 / Bit 4 = ”0”). Considering that fact you can use these two bytes freely.
They will not affect memory configuration. For example, the OEM client can put his own OEM
serial number here.
Explanations of abbreviations used:
Htswp.doc/HS
r/w
ro
wo
0
read and write
read only
write only
neither read nor write
Page 82 (104)
Rev. 1.0
98-02-10