srf66v01st Infineon Technologies Corporation, srf66v01st Datasheet - Page 9

• Manufacturer Part Number: srf66v01st
• Description: Intelligent 1 Kbit Eeprom With Contactless Interface Compliant To
• Manufacturer: Infineon Technologies Corporation

Furthermore, identification and addressing of tags is possible via a conditional test conducted on a user defined
Conditional Identifier stored in chip memory. The chip rejects commands if the Conditional Identifier stored in chip
memory is less than the Conditional Identifier supplied in the command. For example, this feature can be used like
a date-code to communicate only to tags whose date-code is higher than the value supplied with the command.
The memory of the chip can be selectively read and written as fully buffered words. It is lockable, which effectively
prevents selected memory areas from being overwritten. The PJM Light can be configured to be password
protected, preventing unauthorized writes to memory. A special Password Protected Read provides an
authentication mechanism without the need of writing to the memory.
The communication speed from the reader to the tag is at a data rate of 424 kbit/s. Chips reply on one of eight
channels at a data rate of 106 kbit/s or 424 kbit/s. At 106 kbit/s readers are able to receive multiple tags using
different reply channels simultaneously. For fast identification rate, a pseudo-random channel hopping is available
which chooses one of the eight channels for transmitting the chip reply. Furthermore, chips can be temporarily
muted to speed up the identification of multiple tags.
2.5
To identify the different types of PJM contactless memories, the ISO/IEC 18000-3 Mode 2 defines Hardcode
Words. If present, they override the default memory organization and indicate optional functionality. The Hardcode
Words are included in normal chip replies.
The memory size and organization as well as the programming time of the PJM Light are meeting the default tag
parameters defined in ISO/IEC 18000-3 Mode 2. Only additional functionality included in the PJM Light is
described in one special function Hardcode Word with value E805
are:
•
•
•
2.6
The PJM Light chip is compliant with ISO/IEC 18000-3 Mode 2. The commands set defined in this standard is
implemented by this chip. Additionally, custom commands are implemented to support fast identification and
operation.
Short Product Information
ECC status
SYSCFG
Short Mute, Short Read, Select, Password Protected Read, Queue and Execute Now, High Speed Reply,
Timed Wakeup and ’1 out of 4’ all available
Determination of the Chip Type
Supported Standards
9 / 10
H
. The features described in this Hardcode Word
SRF 66V01ST PJM Light
SRF 66V01ST
PJM Light
2009-02-26