HT-CM400 NXP Semiconductors, HT-CM400 Datasheet - Page 84

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

Transponders
Configuration Byte 1:
Configuration Byte 1 / Bit 5 ... 7:
These three bits are reserved.
ATTENTION: When writing a new value to byte Configuration Byte 1, bit positions
marked as „reserved“ must not be altered. To meet that condition read the current
Configuration Byte 1 value and mask in your new values for bit positions you are allowed
to change.
Configuration Byte 1 / Bit 4:
Bit= ‘1’: Configuration Page can be read and written to.
Bit= ‘0’: Configuration Page can only be read. This process is irreversible !
ATTENTION: Do not set Bit 4 of Configuration Byte 1 to ‘0’ before having written the
final data into the Configuration Page of the transponder.
Configuration Byte 1 / Bits 1 ... 3:
These three bits are reserved.
ATTENTION: When writing a new value to byte Configuration Byte 1, bit positions
marked as „reserved“ must not be altered. To meet that condition read the current
Configuration Byte 1 value and mask in your new values for bit positions you are allowed
to change.
Configuration Byte 1 / Bit 0:
Bit= ‘0’: Access type for Blocks 4 to 7 is SECRET.
Bit= ‘1’: Access type for Blocks 4 to 7 is PUBLIC.
This bit can be set or reset until Bit 4 of Configuration Byte 1 is set to ‘0’.
Htswp.doc/HS
7 6
5 4
3 2
1 0
Page 84 (104)
Rev. 1.0
Access type for Blocks 4 to 7: "0" ... SECRET
reserved
reserved
reserved
OEM Lock Bit: "1" ... Configuration Page is r/w
reserved
reserved
reserved
"0" ... Configuration Page is ro
"1" ... PUBLIC
98-02-10