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MLX90111
128bit Read Write Transponder
MLX90111 128bit Read Write Transponder
Page 9 of 12
Rev 1.12 5-Feb-01
Data send to transponder as number of bit periods
Asynchron
Tsetup
ACP
TWD
TWD
Synchron
SB
CMF
ADDR PAR
DATA
CRC
PROG/READ
SB
Bit periods
>5
3*Tas
+ 6bit
20
1
3
4
1
16
8
32
20
1
Transponder mode / operations
Normal read Enter program mode:
-
Stop modulation
-
Synchronize on Start bit
Read (32-bit) command
Verify command
+ Write / Read
EEPROM data
Resynchronize
on Start bit
MLX90111 Timing Specifications in ms for a Carrier Freq = 125kHz, Tclk=8µµs
Speed
Bit Period
Tas
TWD
PROG/READ
Min (2 bit)
Max (3 bit)
20 bit
32 bit
Tclk*128
Tclk*192
Tclk*1280
Tclk*2048
Freq/64 (2kbaud)
Tclk*64 = 0.512
1.024
1.536
10.24
16.384
Freq/32 (4kbaud)
Tclk*32 = 0.256
0.55
0.7
5.12
8.192
Tas
6bit
Twd
0 - 0 0 1- ...
SB-CMF1- ...
Tas
FLOW
FHIGH
Tsetup
ACP pattern
Tas
Biphase: 1 1 1 0 0 1 1 1 0 1 1 - - - -
FLOW
FTHRESHOLD
FHIGH
1. Modulation on Reader Antenna
2. Modulation on Tag Antenna
3. 1+2 Superposed on Tag Antenna
-
X: samples taken by transponder
-
Dark shaded: reader coil modulation ON
-
Light shaded: reader coil modulation OFF
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