LRI2K_08 Datasheet, PDF (57/89 Pages) STMicroelectronics – 2048-bit EEPROM tag IC at 13.56 MHz, with 64-bit UID and kill code, ISO 15693 and ISO 18000-3 Mode 1 compliant

LRI2K
20.9
Commands codes
Write AFI
On receiving the Write AFI request, the LRI2K writes the AFI byte value into its memory. The
Option_flag is supported.
During the write cycle t_W, there should be no modulation (neither 100% nor 10%).
Otherwise, the LRI2K may not write correctly the AFI value into the memory. The t_W time is
equal to t_1nom + 18 × 302µs.
Table 44. Write AFI request format
Request
SOF
Request
_flags
Write AFI
UID
AFI
CRC16
Request
EOF
8 bits
27h
64 bits
8 bits
16 bits
Request parameters:
● UID (Optional)
● AFI
Table 45. Write 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 46. Write AFI response format when Error_flag is set
Response SOF Response_flags Error code
CRC16
8 bits
8 bits
16 bits
Response parameter:
● Error code as Error_flag is set:
– 12h: block is locked
– 13h: block not programmed
Response EOF
Figure 48. Write AFI frame exchange between VCD and LRI2K
VCD
LRI2
K
SOF
Write AFI
request
EOF
<-t₁-> SOF
Write AFI
response
EOF
Write sequence when
error
LRI2
K
<------------ t_W ------------><- t₁ -> SOF
Write AFI
response
EOF
57/89