SR176_07 Datasheet, PDF (22/35 Pages) STMicroelectronics – 13.56 MHz, 176-bit short range contactless user EEPROM with 64-bit Unique ID

Device operations (instructions)
SR176
Figure 32. PROTECT_BLOCK frame exchange between Reader and SR176
Reader SOF 09h 0Fh 00h LOCK_REG CRCL CRCH EOF
SR176
No Response
AI07712B
5.8
GET_PROTECTION
Command Code = 08h,0Fh
Prior to any GET_PROTECTION, the SR176 must have been set into the SELECTED state.
GET_PROTECTION allows the protection status of memory blocks 4 to 15 to be read.
When receiving the GET_PROTECTION command, the SR176 responds with the 16-bit
value of block 15 (Figure 35). It gives the status of the LOCK_REG and the Chip_ID of the
SR176.
Request parameters (Figure 33):
● none
Response parameters (Figure 34):
● Chip_ID: least significant Byte
● LOCK_REG: most significant Byte
Figure 33. GET_PROTECTION request format
SOF
PROTECT_BLOCK
08h
0Fh
CRCL
8 bits
Figure 34. GET_PROTECTION response format
SOF
Chip_ID
8 bits
LOCK_REG
8 bits
CRCL
8 bits
CRCH
8 bits
EOF
AI07713B
CRCH
8 bits
EOF
AI07714B
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