SR176_07 Datasheet, PDF(23/35 Page) STMicroelectronics – 13.56 MHz, 176-bit short range contactless user EEPROM with 64-bit Unique ID

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SR176_07 Datasheet, PDF (23/35 Pages) STMicroelectronics – 13.56 MHz, 176-bit short range contactless user EEPROM with 64-bit Unique ID

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SR176

Device operations (instructions)

Table 4. Chip_ID and LOCK_REG

Block 15

Response

bits

parameter bits

Meaning

b15

b14

b13

b12

b11

b10

b4 to b7

b0 to b3

LOCK_REG b7

LOCK_REG b6

LOCK_REG b5

LOCK_REG b4

LOCK_REG b3

LOCK_REG b2

LOCK_REG b1

LOCK_REG b0

Chip_ID b4 to b7

Chip_ID b0 to b3

1: Blocks 14 and 15 are write-protected (0: indicates that write-access is allowed)

1: Blocks 12 and 13 are write-protected (0: indicates that write-access is allowed)

1: Blocks 10 and 11 are write-protected (0: indicates that write-access is allowed)

1: Blocks 8 and 9 are write-protected (0: indicates that write-access is allowed)

1: Blocks 6 and 7 are write-protected (0: indicates that write-access is allowed)

1: Blocks 4 and 5 are write-protected (0: indicates that write-access is allowed)

1: Blocks 2 and 3 are write-protected (0: indicates that write-access is allowed)

1: Blocks 0 and 1 are write-protected (0: indicates that write-access is allowed)

Reserved

Chip_ID (Value from 0h to Fh)

Figure 35. GET_PROTECTION frame exchange between Reader and SR176

Reader SOF 08h

SR176

0Fh CRCL CRCH EOF

t1 SOF Chip_ID LOCK_REG CRCL CRCH EOF

AI07716B

5.9

Power-on state

After Power-on, the SR176 is in the following state:

â The device is in the low power mode.

â The device is deselected.

â The device presents its highest impedance to the reader antenna field.

â It will not answer to any command except INITIATE.

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