SRT512-SBN18/1G2 STMICROELECTRONICS [STMicroelectronics], SRT512-SBN18/1G2 Datasheet - Page 30
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SRT512-SBN18/1G2
Manufacturer Part Number
SRT512-SBN18/1G2
Description
13.56 MHz short-range contactless memory chip with 512-bit EEPROM and anticollision functions
Manufacturer
STMICROELECTRONICS [STMicroelectronics]
Datasheet
1.SRT512-SBN181G2.pdf
(46 pages)
- Current page: 30 of 46
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SRT512 commands
8.3
30/46
Slot_marker(SN) command
Command code = x6h
The SRT512 must be in Inventory state to interpret the Slot_marker(SN) command.
The Slot_marker byte code is divided into two parts:
●
●
On receiving the Slot_marker() command, the SRT512 compares its Chip_slot_number
value with the Slot_number value given in the command code. If they match, the SRT512
returns its Chip_ID value. If not, the SRT512 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 SRT512 device in Inventory
state present in the reader field range.
Figure 28. Slot_marker request format
Request parameter:
●
Figure 29. Slot_marker response format
Response parameters:
●
Figure 30. Slot_marker frame exchange between reader and SRT512
Reader
SRT512
b
with fixed value 6.
b
15. The value 0 is reserved by the Pcall16() command.
x: Slot number
Chip_ID of the SRT512
3
7
to b
to b
SOF
0
4
: 4-bit command code
: 4 bits known as the Slot_number (SN). They assume a value between 1 and
SOF
SOF
X6h
CRC L
Chip_ID
Slot_marker
8 bits
Doc ID 13277 Rev 4
X6h
CRC H EOF
<-t 0 ->
8 bits
CRC L
8 bits
CRC L
<-t 1 ->
SOF
CRC H
8 bits
CRC H
8 bits
Chip_ID
CRC L CRC H
EOF
EOF
AI07671
AI07675b
SRT512
AI13509b
EOF
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