SRI512 SRI512 commands
Doc ID 13263 Rev 5 31/47
8.3 Slot_marker(SN) command
Command code = x6h
The SRI512 must be in Inventory state to interpret the Slot_marker(SN) command.
The Slot_marker byte code is divided into two parts:
● b
3
to b
0
: 4-bit command code
with fixed value 6.
● b
7
to b
4
: 4 bits known as the Slot_number (SN). They assume a value between 1 and
15. The value 0 is reserved by the Pcall16() command.
On receiving the Slot_marker() command, the SRI512 compares its Chip_slot_number
value with the Slot_number value given in the command code. If they match, the SRI512
returns its Chip_ID value. If not, the SRI512 does not send any response.
The Slot_marker() command, used together with the Pcall16() command, allows the reader
to search for all the Chip_IDs when there are more than one SRI512 device in Inventory
state present in the reader field range.
Figure 29. Slot_marker request format
Request parameter:
● x: Slot number
Figure 30. Slot_marker response format
Response parameters:
● Chip_ID of the SRI512
Figure 31. Slot_marker frame exchange between reader and SRI512
SOF Slot_marker CRC
L
CRC
H
EOF
AI07675b
X6h 8 bits 8 bits
SOF Chip_ID CRC
L
CRC
H
EOF
AI07671
8 bits 8 bits 8 bits
SOF X6h CRC
L
CRC
H
EOF
AI10944
Reader
SRI512
SOF Chip_ID CRC
L
CRC
H
EOF
<-t
0
-> <-t
1
->
