lri2k STMicroelectronics, lri2k Datasheet - Page 53

• Manufacturer Part Number: lri2k
• Description: 13.56 Mhz, 2048-bit Eeprom Tag Ic With 64-bit Uid And Kill Code, Iso 15693 And Iso 18000-3 Mode 1 Compliant
• Manufacturer: STMicroelectronics

LRI2K
20.6
Read Multiple Block
When receiving the Read Multiple Block command, the LRI2K reads the selected blocks
and sends back their value in multiples of 32 bits in the response. The blocks are numbered
from '00 to '3F' in the request and the value is minus one (–1) in the field. For example, if the
“number of blocks” field contains the value 06h, 7 blocks will be read. The maximum number
of blocks is fixed at 64. During Sequential Block Read, when the block address reaches 64,
it rolls over to 0. The Option_Flag is supported.
Table 34.
Request parameters:
Table 35.
1. Repeated as needed.
Response parameter:
Table 36.
Table 37.
Response parameter:
Request
Response
Response SOF
SOF
b
SOF
7
Option_Flag
UID (Optional)
First Block Number
Number of Blocks
Block Locking Status if Option_Flag is set (see
N Blocks of Data
Error code as Error_Flag is set:
–
–
0Fh: other error
10h: block address not available
b
Request_
6
Flags
Response_
8 bits
Read Multiple Block request format
Read Multiple Block response format when Error_Flag is NOT set
Block Locking status
Read Multiple Block response format when Error_Flag is set
Flags
8 bits
b
Response_Flags
5
Multiple
Block
Read
23h
8 bits
All 0
b
4
Locking
8 bits
Status
Block
b
(1)
3
64 bits
UID
Error code
b
2
8 bits
b
32 bits
1
Data
number
Table 36: Block Locking
block
8 bits
0: Current Block not locked
1: Current Block locked
First
(1)
Number
CRC16
blocks
16 bits
8 bits
of
CRC16
16 bits
b
0
Commands codes
CRC16
16 bits
Response EOF
status)
Response
Request
EOF
EOF
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