xra00 STMicroelectronics, xra00 Datasheet - Page 32

• Manufacturer Part Number: xra00
• Description: Uhf, Epcglobal Class 1b, Contactless Memory Chip 96 Bit Epc With Inventory And Kill Function
• Manufacturer: STMicroelectronics

XRA00
Lock Function
The Lock function is implemented by programming
a specific value into the lock bits of the XRA00, us-
ing the ProgramID command. In order to lock the
XRA00, the 8 upper bits of the row 7 must be pro-
Table 14. Row 7 of an Unlocked or Erased Memory
Table 15. Row 7 of a Locked Memory (Showing Lock Code A5h)
EraseID and ProgramID Timing
The time required to erase or program a XRA00 is
t
Backscattered Answer Modulation Parameters
values.
The Reader to XRA00 Request Frame is much like
the Basic Command frame. The differences be-
tween the two are listed below:
Figure 34. EraseID and ProgramID Signaling
32/40
erase
Prior sequence
transaction gap
or carrier off
Row 7
Row 7
Value
Value
P
3
bit
bit
The Programmer must send 0's after the
[EOF] for the duration of the program or erase
time, t
64µs
and t
bit8bit 1
bit8bit 1
000000000000000000000
127
127
pgm
0
1
pgm
, respectively. See
or t
Spin up
126
126
20 0's
0
0
erase
125
125
.
0
1
1
O
S
F
124
124
Lock Bit
Lock Bit
0
0
Command
variable number of bits
Table 4., XRA00
123
123
0
0
P
1
Pointer
122
122
Variable Data
0
1
16 data bits
P
2
always 16
121
121
Length
0
0
for
ProgramID, EraseID Commands
120
120
P
3
0
1
grammed with the value A5h, as shown in
14.
If a value different from A5h is programmed in the
8 upper bits of the row 7, the tag in NOT LOCKED,
and the XRA00 will return this value in response to
any ScrollID, ScrollAllID or Verify command.
variable
number
Value
of bits
bit8bit1
bit8bit1
119
119
and
0
0
The ProgramID and EraseID operations are
terminated by a "1" at the end of t
The Programmer must transmit seven 0's after
the terminating "1" to allow the XRA00 to
perform an orderly shutdown of the erase/
program sequence.
Transmission of subsequent programming
commands must be preceded by an XRA00
carrier off interval of at least 8 x t
P
4
Table 15.
P
5
118
118
O
E
F
0
0
EOF
117
117
0
0
t erase or t pgm
116
116
Kill Code
Kill Code
0's
0
0
115
115
0
0
114
114
0
0
t 0
10000000
Power Off Interval
7 0's
0
Between Rows
erase
= 8t 0 minimun
.
113
113
0
0
P
4
P
5
or t
O
E
F
ai10772
Table
112
112
pgm
0
0
.