ATA555812-DDW Atmel, ATA555812-DDW Datasheet - Page 34

• Manufacturer Part Number: ATA555812-DDW
• Manufacturer: Atmel

Specifications of ATA555812-DDW

• Operating Temperature (max): 85C
• Operating Temperature (min): -40C
• Operating Temperature Classification: Industrial
• Lead Free Status / RoHS Status: Not Compliant

7.14
34
SelectNGroup
ATA5558 [Preliminary]
When receiving the SelectNGroup command, all tags in the READY state which do not match
the partial Tag ID will enter the Selected state and answer with the SOF pattern. The partial Tag
ID can vary length. It’s pattern position relative to the Tag ID is set by the first (leftmost) 1 in the
command 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 7-28.
Table 7-29.
Example of SelectNGroup Parameters:
Sample Tag ID 6CB9 :
The above Tag ID would be selected by all the following GroupNSelect command parameters:
1) Command Parameter:
2) Command Parameter:
3) Command Parameter:
4) Command Parameter:
Command
SelectGroup = 00 10 1
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 – 2
01 10 11 00 10 11 10 01
0 00 00 00 1 0 00 11
0 00 00 00 00 01 11 11
0 00 00 00 00 00 00 00 1 0
1 00 10 11 00 10 11 10 01
XX XX XX X0 00 11 XX XX
XX XX XX XX XX 11 11 XX
XX XX XX XX XX XX XX X0
00 10 11 00 10 11 10 01
0 + 1
Parameter 2
Matching pattern section of Tag
ID
<n> bits; n = 2 ..
4681C–RFID–09/05