Hand Held Products 3700 CCD manual Microprocessor, Timing Sequence

Microprocessor

The microprocessor controls the generation of timing signals required for the operation of the SCANTEAM 3700 device. Additionally it monitors the digital output of the device, configures the operating parameters sent through serial commands (as required), and decodes the scanned bar code data.

Timing Sequence

Figure A.2 illustrates the timing sequence for the SCANTEAM 3700.

Bar Code Symbol

Being Scanned

Timing

Shift Out Analog Data

Illumination

Analog Signal from CCD Array

White

Black

Digital Data Out

White

Black

Decoded Data (Decoded Output Only)

Figure A.2 SCANTEAM 3700 Timing Sequence

CCD Operation and Bar Code Scanning A–3