SR176

Signal description

7/35

The memory array of the SR176 is divided into two main areas: the unique identifier (UID)

and the User EEPROM. The UID is a 64-bit unique identifier, written by ST during product

manufacture. The User EEPROM is divided into areas which can be write-protected so that

they behave as ROM. The write protection is activated using an OTP lock bits register. It is

possible to program the SR176 4-bit chip_ID used by the SELECT command. Its default

can be selected individually.

Figure 2.

Die floor plan

2

Signal description

2.0.1

AC1, AC0

AC1 and AC0 pads must be directly bonded to the antenna.

AI09782

AC1

AC0