ATA555812C-DBB Atmel, ATA555812C-DBB Datasheet - Page 33

• Manufacturer Part Number: ATA555812C-DBB
• Description: IC IDIC 1KBIT R/W SAWN WAFER
• Manufacturer: Atmel

Specifications of ATA555812C-DBB

• Function: Read/Write
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

7.13
4681E–RFID–11/09
SelectGroup
When receiving the SelectGroup command, all tags in the READY state with the matching par-
tial Tag ID will enter the Selected state and answer with the SOF pattern. The partial Tag ID can
vary in length. It’s pattern position relative to the Tag ID is set by the first (leftmost) 1 in the com-
mand parameter. The preceeding 0 bits act solely as “don’t care” spacer bits. This “mask
header” is not part of the actual partial Tag ID. The mask pattern follows the mask header and is
terminated by the end of command.
Leading 0 don’t care mask bits + 1 = mask header (not part of Partial Tag ID)
X = don’t care mask bits
Table 7-26.
Table 7-27.
Example of SelectGroup Parameters:
Sample Tag ID 6CB9 :
The above Tag ID would be selected by all the following GroupSelect command parameters:
1) Command Parameter:
2) Command Parameter:
3) Command Parameter:
4) Command Parameter:
Command
SelectGroup = 00 10 0
5 bits
SOF
Start of Frame
3 .. 10-bit period
Partial Tag ID:
Partial Tag ID:
Partial Tag ID:
Partial Tag ID:
Interrogator Command Parameters
Tag Response
Parameter 1
Mask header: <m–1>
<m> bits, (m = 1 .. Tag ID length)
01 10 11 00 10 11 10 01
0 00 00 00 10 10 11
0 00 00 00 00 01 11 10
0 00 00 00 00 00 00 00 11
1 01 10 11 00
XX XX XX XX XX XX XX X1
XX XX XX X0 10 11 XX XX
XX XX XX XX XX 11 10 XX
01 10 11 00 XX XX XX
0 + 1
Parameter 2
Partial Tag ID
<n> bits, (1 .. Tag IDTag ID
length)
ATA5558
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