SRI512-A3S/1GE STMicroelectronics, SRI512-A3S/1GE Datasheet - Page 15

• Manufacturer Part Number: SRI512-A3S/1GE
• Description: IC MEMORY 13.56MHZ EEPRM ADH ANT
• Manufacturer: STMicroelectronics
• Series: SRI512r

Specifications of SRI512-A3S/1GE

• Rf Type: Read / Write
• Frequency: 13.56MHz
• Features: ISO14443-B
• Package / Case: 38mm x 38mm
• Operating Temperature (max): 85C
• Operating Temperature Classification: Commercial
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-5535-2

SRI512
4.1
Resettable OTP area
This area contains five individual 32-bit Boolean words (see
area). A Write_block command will not erase the previous contents of the block as the write
cycle is not preceded by an auto-erase cycle. This feature can be used to reset selected bits
from 1 to 0. All bits previously at 0 remain unchanged. When the 32 bits of a block are all at
0, the block is empty, and cannot be updated any more. See
examples of the result of the Write_block command in the resettable OTP area.
Figure 12. Resettable OTP area (addresses 0 to 4)
Figure 13. Write_block update in standard mode (binary format)
The five 32-bit blocks making up the Resettable OTP area can be erased in one go by
adding an auto-erase cycle to the Write_block command. An auto-erase cycle is added
each time the SRI512 detects a Reload command. The Reload command is implemented
through a specific update of the 32-bit binary counter located at block address 6 (see
Section 4.2: 32-bit binary counters
Previous data stored in block
Data to be written
New data stored in block
Address
Block
0
1
2
3
4
MSb
b31
b31
1
1
1
Doc ID 13263 Rev 5
...
...
...
32-bit Boolean Area
32-bit Boolean Area
32-bit Boolean Area
32-bit Boolean Area
32-bit Boolean Area
for details).
1
1
1
b16 b15 b14
32-bit Block
1
0
0
0
0
0
1
1
1
0
0
0
b8 b7
1
1
1
Figure 12
Figure 13
1
1
1
1
0
0
LSb
1
0
0
b0
for a map of the
and
Memory mapping
1
1
1
Figure 14
Resettable
OTP Bit
Description
0
1
0
1
1
1
for
ai07658
ai12381
15/47
1
1
1
b0