HT2DC20S20/F,122 NXP Semiconductors, HT2DC20S20/F,122 Datasheet - Page 13

• Manufacturer Part Number: HT2DC20S20/F,122
• Description: RFID HITAG STICK TRANSP 125KHZ
• Manufacturer: NXP Semiconductors
• Series: HITAG® 2r

Specifications of HT2DC20S20/F,122

• Rf Type: Read / Write
• Frequency: 125kHz
• Features: 128 bits user data, 128 bits control data
• Package / Case: PLLMC
• Operating Temperature Range: - 40 C to + 85 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 568-2203; 568-2203-1; 568-2203-1; 935233940122; HT2DC20S20M

5.4 Definition of Passwords and Keys
Keys are cryptographic codes, which determine data encryption during data transfer between
read/write device and transponder. They are used to select a HT2DC20S20 transponder in
Crypto Mode. The 16 bit KEY HIGH and 32 bit KEY LOW form one 48-bit key which has to be
identical on both the transponder and the read/write device.
Passwords are needed to select a HT2DC20S20 transponder in Password Mode. There is one
pair of passwords (Password TAG, Password RWD), which has to be identical both on the
transponder and the read/write device.
Password TAG:
Password RWD:
It is important that the following values are in accordance with each other, i.e. the respective data
on the read/write device and on the transponder have to be identical pairs.
HT2DC20S20 in Password mode:
HT2DC20S20 in Crypto mode:
The passwords and keys are predefined by Philips by means of defined Transport Passwords
and a Transport Key. They can be written to, which means that they can be changed (see also
Chapter “Configuration of Delivered HT2DC20S20 Transponders“).
ATTENTION: Passwords and Keys only can be changed if their current values are known!
HITAG 2 Transponders
as an option (depending on the configuration of the read/write device):
as an option (depending on the configuration of the read/write device):
Password that the transponder sends to the read/write device and which
may be verified by the latter (depending on the configuration of the
read/write device).
Password that the read/write device sends to the transponder and which is
checked for identity by the latter.
Password RWD ⇔ Password RWD
Password TAG ⇔ Password TAG
Password TAG ⇔ Password TAG
KEY HIGH
KEY LOW
read/write
read/write
on the
device
on the
device
Product Specification 3.0
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⇔
⇔
transponder
transponder
KEY HIGH
KEY LOW
on the
on the
July 2006