SR176_07 datasheet(13/35 Pages) STMICROELECTRONICS

Part #	SR176

Description	13.56 MHz, 176-bit short range contactless user EEPROM with 64-bit Unique ID

PDF	35 Pages

Scroll/Zoom	100%

Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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13 / 35 page

SR176

Memory mapping

13/35

4.2

Device selection

After introducing the device in the reader’s electromagnetic field, the SR176 has to be

activated by a INITIATE command. After this command, the SR176 is in the ACTIVE state

and waits for a SELECT command, as shown in Figure 13. The SELECT command

specifies a 4-bit Chip_ID as a parameter. If the Chip-ID of the SR176 matches this

parameter, the SR176 goes in the SELECTED state, and memory blocks become available

for READ_BLOCK and WRITE_BLOCK commands up to the reception of a COMPLETION

command. If the Chip_ID does not match, the SR176 returns to, or stays in, the

DESELECTED state. Write access rights are activated by the SELECT command.

After the Power On of the SR176, if the INITIATE command is not send or is not correctly

generated, memory blocks will not be activated, and the SR176 will not respond to any

command.

SR176 Datasheet(PDF) 13 Page - STMicroelectronics