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SRI512 Datasheet(PDF) 20 Page - STMicroelectronics

Part # SRI512
Description  13.56 MHz short-range contactless memory chip with 512-bit EEPROM and anticollision functions
PDF  47 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

SRI512 Datasheet(HTML) 20 Page - STMicroelectronics

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4.4.2
Fixed Chip_ID (option)
The SRI512 is provided with an anticollision feature based on a random 8-bit Chip_ID. Prior
to selecting an SRI512, an anticollision sequence has to be run to search for the Chip_ID of
the SRI512. This is a very flexible feature, however the searching loop requires time to run.
For some applications, much time could be saved by knowing the value of the SRI512
Chip_ID beforehand, so that the SRI512 can be identified and selected directly without
having to run an anticollision sequence. This is why the SRI512 was designed with an
optional mask setting used to program a fixed 8-bit Chip_ID to bits b7 to b0 of the system
area. When the fixed Chip_ID option is used, the random Chip_ID function is disabled.



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