SRI512_08 datasheet(17/47 Pages) 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

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17 / 47 page

SRI512

Memory mapping

17/47

Figure 16.

Count down example (binary format)

The counter with block address 6 controls the Reload command used to reset the resettable

OTP area (addresses 0 to 4). Bits b31 to b21 act as an 11-bit Reload counter; whenever one

of these 11 bits is updated, the SRI512 detects the change and adds an Erase cycle to the

Write_block command for locations 0 to 4 (see Section 4.1: Resettable OTP area). The

Erase cycle remains active until a Power-off or a Select command is issued. The SRI512’s

resettable OTP area can be reloaded up to 2,047 times (211-1).

ai07661

...1111111111111

...111111111111

...11111111111

Initial data

1-unit decrement

b31

...11111111111

...111111111

0100

...111111111

1000

1-unit decrement

8-unit decrement

Increment not allowed

SRI512 Datasheet(PDF) 17 Page - STMicroelectronics