MLX90110 ETC1 [List of Unclassifed Manufacturers], MLX90110 Datasheet - Page 7

• Manufacturer Part Number: MLX90110
• Description: 128bit OTP/RW Transponder
• Manufacturer: ETC1 [List of Unclassifed Manufacturers]

Data send to transponder
Normal
Transponder mode/operations
Read
TACP
FLOW
FHIGH
16
3 Timing specification
3.1 Asynchronous Control Pattern
The ACP is a pattern send by the reader to the
transponder without any synchronization.
signals the transponder to stop transmitting and
listen for a programming sequence.
The control pattern is based on the detection of
4 transitions between high field strength (FHIGH
or Vacprh) and low field strength (FLOW or
Vacprl).
successfully detected, the transponder stops
modulating.
Before starting the ACP, the field must be stable
at FHIGH for at least 2 bit periods (Tas).
Right after the last ACP transition, there is an
additional delay equal to Tas before the
transponder resets the watchdog counter (TWD).
During this delay the Field can be put back to
high to optimise operating distance.
MLX90110 128bit MTP Transponder
MLX90110 Timing Specifications (carrier: Freq=125kHz, Tclk=8 s)
Freq/64 (2kbaud)
Freq/32 (4kbaud)
modultion
TWD
Stop
16
Speed
After the control pattern has been
detection
Start bit
SB
1
Tas
Bit period
0.512ms
0.256ms
RECEIVE
Tclk
Treceive
DATA
16
Tas
ERASE
WORD
Terase
TWD / Tsend
16
Tclk*1024
8.912ms
4.096ms
Tas
ACP pattern
WRITE
WORD
Twrite
It
16
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Tas
Terase/ Twrite
Tclk*1024
8.912ms
4.096ms
Watchdog
The transponder samples the field strength once
per bit. An edge will be detected correctly if the
tag has sampled at least 2 consecutive values
on one level, and then at least 2 values at the
other level.
than 2 bit, to guarantee that the transition will be
correctly detected. The four transitions should
be completed in timeout of 16 periods (TACP).
If the startbit is not detected within 16 periods
(TWD) after TACP a time out will occur. See
operating modes to see correct flow at time out.
3.2 Other timings
The startbit is followed by a 16bit word, which
will be programmed at the address defined by
the address counter. This counter is reset when
the ACP is received. It increments after each
new word.
The other timings can be calculated based on
the formulas below.
time out
TWD
16
Tas
128bit OTP/RW Transponder
startbit
New
SB
Therefore, Tas should be longer
1
RECEIVE
Treceive
MLX90110
DATA
16
Twd
Rev 1.14 1-Dec-2000
WRITE
start bit
Terase
WORD
16
ERASE
WORD
Twrite
16