ATA555811-DDT ATMEL [ATMEL Corporation], ATA555811-DDT Datasheet - Page 23
![no-image](/images/no-image-200.jpg)
ATA555811-DDT
Manufacturer Part Number
ATA555811-DDT
Description
1 kbit R/W IDIC with Deterministic Anticollision
Manufacturer
ATMEL [ATMEL Corporation]
Datasheet
1.ATA555811-DDT.pdf
(42 pages)
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Figure 6-2.
Figure 6-3.
4681C–RFID–09/05
T
T
T
Tag
Tag
T
GetID Command with Partially Known Tag ID
Subsequent Tag Responses in Anticollision Loop (Two Alternative Tag IDs)
Tag
IR
2 bit period
2 bit period
TagID bit
TagID bit
S
final
final
'0'
Gap
'1'
Anticollision response
SOC
00
from all tags.
T
GetID
1
SOF
T
00
0
remaining tag with '1' in last TagID
remaining tag with '1' in last TagID
even
00
Interrogator acknowledge gap
Anticollision response from
Anticollision response from
Interrogator command GetID (TagIDpart = "A23")
position (TagID = A232)
position (TagID = A233)
Final tag response for TagID "A232" + CRC
10
2 bit period 2 bit period 2 bit period
Tag response for TagID's "A232" or "A233"
SOF
SOF
'0'
Final Tag response for TagID "A233" + CRC
subsequent TagID bits
A
10
'0'
00
'0'
'0'
'1'
'1'
'1'
2
16 bit Manchester coded CRC (= "7D2C" )
10
16 bit Manchester coded CRC (= "6D0D" )
'1'
'1'
T
Tag
ATA5558 [Preliminary]
Alternative A (TagID = "A233")
Alternative B (TagID = "A232")
'0'
'1'
Anticollision response from all tags
00
with '1' in current TagID position
Interrogator acknowledge gap
(TagID = A233 and/or A232)
3
'0'
'0'
11
SOF
'1'
'1'
'1'
'1'
T
Tag
'0'
'0'
T
Tag
'1'
'0'
23
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