SR176A4T1GE STMicroelectronics, SR176A4T1GE Datasheet - Page 18

• Manufacturer Part Number: SR176A4T1GE
• Manufacturer: STMicroelectronics

Specifications of SR176A4T1GE

• Operating Temperature (max): 85C
• Operating Temperature Classification: Commercial
• Lead Free Status / RoHS Status: Compliant

Device operations (instructions)
5.4
5.5
18/35
Read the 64-bit UID
READ_BLOCK
Command Code = 08h,(X.AD)
When receiving the READ_BLOCK command, the SR176 reads the requested block and
sends back its 16-bit value in response
bits of the address code, (X.AD) (b
example, address 06h sends back the value of block 6.
Prior to any READ_BLOCK command, the SR176 must have been set into the SELECTED
state.
Request parameters
Response parameters
To read the complete 64-bit UID value from the SR176, the reader must provide a sequence
of four READ_BLOCK commands, in the following order
Figure 24. READ_BLOCK request format
Figure 25. READ_BLOCK response format
ADDRESS: to specify an address block from 00h to 0Eh
DATA
DATA
READ_BLOCK @ 0 to get UID0
READ_BLOCK @ 1 to get UID1
READ_BLOCK @ 2 to get UID2
READ_BLOCK @ 3 to get UID3
SOF
SOF
L
H
: least significant Byte
: most significant Byte
READ_BLOCK
08h
DATA L
8 bits
(Figure
(Figure
24):
+ 4-bit address
25):
4 zero-bits
ADDRESS
DATA H
8 bits
3
to b
(Figure
0
) represents the block address to be read. For
26). The AD value of the four least significant
CRC L
8 bits
CRC L
8 bits
(Figure
CRC H
27):
8 bits
CRC H
8 bits
EOF
EOF
AI07705B
AI07706B
SR176