LRIS2K_08 Datasheet, PDF (67/102 Pages) STMicroelectronics – 2048-bit EEPROM tag IC at 13.56 MHz, with 64-bit UID and Password, ISO15693 and ISO18000-3 Mode 1 compliant

LRIS2K
31 Lock AFI
Lock AFI
On receiving the Lock AFI request, the LRIS2K locks the AFI value permanently. The
Option_flag is supported.
During the write cycle t_W, there should be no modulation (neither 100% nor 10%).
Otherwise, the LRIS2K may not Lock correctly the AFI value in memory. The t_W time is
equal to t_1nom + 18 × 302 µs.
Table 50. Lock AFI request format
Request Request_ Lock
SOF
flags
AFI
8 bits
28h
UID
64 bits
CRC16
16 bits
Request
EOF
Request parameter:
● UID (optional)
Table 51. Lock AFI response format when Error_flag is NOT set
Response
SOF
Response_flags
CRC16
8 bits
16 bits
Response parameter:
● No parameter
Response
EOF
Table 52. Lock AFI response format when Error_flag is set
Response Response_
SOF
Flags
Error code
CRC16
8 bits
8 bits
16 bits
Response parameter:
● Error code as Error_flag is set
– 11h: block is locked
– 14h: block not locked
Response
EOF
Figure 48. Lock AFI frame exchange between VCD and LRIS2K
VCD
SOF
Lock AFI
request
EOF
LRIS2K
<-t₁-> SOF
Lock AFI
response
EOF
Lock sequence when
error
LRIS2K
<------------ t_W ------------><- t₁ -> SOF
Lock AFI
response
EOF
67/102