SLRC400 datasheet(4/130 Pages) PHILIPS

4 / 130 page

Philips Semiconductors

Product Specification Rev. 2.0 November 2001

•CODE Reader IC

SL RC400

Preliminary

11.1

Hard Power Down Phase........................................................................................................... 81

11.2

Reset Phase.............................................................................................................................. 81

11.3

Initialising Phase........................................................................................................................ 81

11.4

Initialising the Parallel Interface-Type.......................................................................................... 82

OSCILLATOR CIRCUITRY........................................................................................................ 83

TRANSMITTER PINS TX1 AND TX2.......................................................................................... 84

13.1

Configuration of TX1 and TX2..................................................................................................... 84

13.2

Operating Distance versus Power Consumption .......................................................................... 84

13.2.1

Antenna Driver Output Source Resistance................................................................................... 85

13.3

Changing the Modulation Index .................................................................................................. 87

13.4

Pulse Width............................................................................................................................... 88

RECEIVER CIRCUITRY ............................................................................................................ 89

14.1

General..................................................................................................................................... 89

14.2

Block Diagram........................................................................................................................... 89

14.3

Putting the Receiver into Operation............................................................................................. 90

14.3.1

Automatic Clock-Q Calibration.................................................................................................... 90

14.3.2

Amplifier.................................................................................................................................... 91

14.3.3

Correlation Circuitry ................................................................................................................... 92

14.3.4

Evaluation and Digitizer Circuitry ................................................................................................ 92

SERIAL SIGNAL SWITCH......................................................................................................... 93

15.1

General..................................................................................................................................... 93

15.2

Block Diagram........................................................................................................................... 93

15.3

Registers Relevant for the Serial Signal Switch............................................................................ 94

SL RC400 COMMAND SET ....................................................................................................... 95

16.1

General Description................................................................................................................... 95

16.2

General Behaviour..................................................................................................................... 95

16.3

SL RC400 Commands Overview ................................................................................................ 96

16.3.1

Basic States.............................................................................................................................. 97

16.3.2

StartUp Command 3Fhex ............................................................................................................ 97

16.3.3

Idle Command 00hex................................................................................................................... 97

16.4

Commands for Label Communication.......................................................................................... 98

16.4.1

Transmit Command 1Ahex........................................................................................................... 98

16.4.2

Receive Command 16hex .......................................................................................................... 100

16.4.3

Transceive Command 1Ehex ..................................................................................................... 102

16.4.4

States of the Label Communication........................................................................................... 102

16.4.5

State Diagram for the Label Communication.............................................................................. 103

16.5

Commands to Access the E²PROM .......................................................................................... 104

16.5.1

WriteE2 Command 01hex .......................................................................................................... 104

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