參數(shù)資料
型號： MCP452WB
廠商： Microchip Technology Inc.
英文描述： 13.56 MHz Read/Write Passive RFID Device
中文描述： 13.56 MHz讀/寫無源RFID器件
文件頁數(shù)： 33/50頁
文件大小： 1172K
代理商： MCP452WB
2003 Microchip Technology Inc.
DS40232H-page 33
MCRF450/451/452/455
7.3
Bit Layout
7.3.1
BLOCK 0
The bit layout in Block 0 is given in the following table.
FR and TF bits are not write-protectable.
TABLE 7-2:
BIT LAYOUT OF BLOCK 0
7.3.1.1
Description Of Bits
TABLE 7-3:
FR BIT (B0:31)
TABLE 7-4:
TF BIT (B0:30)
TABLE 7-5:
TFT BITS (B0:29 - B0:28)
TABLE 7-6:
DF BITS (B0:27 - B0:26)
B0:31
B0:30
B0:29
B0:28
B0:27
B0:26
B0:25
B0:24
FR
TF
TFT1
TFT0
DF1
DF0
MT1*
MT0*
B0:23
B0:22
B0:21
B0:20
B0:19
B0:18
B0:17
B0:16
TM2*
TM1*
TM0*
User Memory
B0:15
B0:14
B0:13
B0:12
B0:11
B0:10
B0:9
B0:8
User Memory
B0:7
B0:6
B0:5
B0:4
B0:3
B0:2
B0:1
B0:0
User Memory
Note:
* These are ‘hardwired’ bits, not EEPROM bits.
FR
Reply to FRR
(Fast Read Request) Command
Reply to FRB
(Fast Read Bypass) Command
Application Example
0
No
Yes
(see Example 9-1 for response)
“Item” has been purchased in
retail EAS applications.
1
Yes
(see Example 9-1 for response)
No
“Item” is unpaid in retail EAS
applications.
Note:
FR bit is not write-protectable.
TF
Condition
0
Interrogator-Talks-First (ITF) mode: Wait for FRR command for FRR Response.
1
Tag-Talks-First (TFT) mode if FR bit is also set: Send Fast Read response without waiting for FRR
command.
Note:
TF bit is not write-protectable.
TFT1
TFT0
TCMAX
1
for Tag-Talks-First mode
0
0
1
0
1
2
1
0
4
1
1
Never Elapses (Default)
2
Note 1:
Only applicable in TTF mode. TSMAX
parameter is set to 64 for TTF mode. For
the ITF mode, the TCMAX is given in the
FRR command.
2:
The device continuously sends its FR
response until it receives its correct
matching code. On average, the device
will send its FR response every 80 ms.
DF1
DF0
FR Data Field Length
0
0
32 bits (Default)
0
1
48 bits
1
0
64 bits
1
1
96 bits
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