MLX90111 Просмотр технического описания (PDF) - Unspecified

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MLX90111

128bit Read Write Transponder

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MLX90111

128bit Read Write Transponder

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 20

1

3

+ 6bit

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

MLX90111 Timing Specifications in ms for a Carrier Freq = 125kHz, Tclk=8µs

Speed

Bit Period

Tas

Min (2 bit) Max (3 bit)

Tclk*128 Tclk*192

TWD

20 bit

Tclk*1280

Freq/64 (2kbaud) Tclk*64 = 0.512

1.024

1.536

10.24

Freq/32 (4kbaud) Tclk*32 = 0.256

0.55

0.7

5.12

Verify command Resynchronize

+ Write / Read on Start bit

EEPROM data

PROG/READ

32 bit

Tclk*2048

16.384

8.192

1. Modulation on Reader Antenna

Tsetup

FHIGH

FLOW

2. Modulation on Tag Antenna

ACP pattern

Tas Tas Tas

6bit

Twd

0 - 0 0 1- ...

SB-CMF1- ...

FHIGH

FTHRESHOLD

FLOW

Biphase: 1 1 1 0 0 1 1 1 0 1 1 - - - -

3. 1+2 Superposed on Tag Antenna

- X: samples taken by transponder

- Dark shaded: reader coil modulation ON

- Light shaded: reader coil modulation OFF

MLX90111 128bit Read Write Transponder Page 9 of 12

Rev 1.12 5-Feb-01

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