SR176

Device operations (instructions)

19/35

Figure 26.

READ_BLOCK frame exchange between Reader and SR176

Figure 27.

64-bit UID storage format

Unique Identifier (UID)

Members of the SR176 family are uniquely identified by a 64-bit Unique Identifier (UID). This

is used for addressing each SR176 device uniquely after the anticollision loop. The UID

complies with ISO/IEC 15963 and ISO/IEC 7816-6. It is a read-only code, and comprises

(as summarized in Figure 28):

●

an 8-bit prefix, with the most significant bits set to D0h

●

an 8-bit IC Manufacturer code (ISO/IEC 7816-6/AM1) set to 02h (for

STMicroelectronics)

●

a 6-bit IC code set to 00 0010b = 2d for SR176

●

a 42-bit Unique Serial Number

Figure 28.

64-bit unique identifier of the SR176

SOF DATAL

AI07707B

DATAH

Reader

SR176

CRCL CRCH EOF

SOF

08h

CRCL CRCH EOF

ADDR

t0

t1

b15

UID2

b0 b15

UID1

b0 b15

UID0

b0

AI07708B

b63

b0

UID3

b0 b15

AI14078

D0h

Unique Serial Number

02h

63

55

47

0

Most significant bits

Least significant bits

41

2d