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UM026001-0413 Operation

ZMOTION

Detection Module II Evaluation Kit

User Manual

Operation

The ZMOTION Detection Module II Evaluation Board provides a number of features to

control its overall operation. It operates in two basic modes:

•

Hardware Interface Mode

•

Serial Interface Mode

Each of these modes is described in this section.

Hardware Interface Mode

Hardware Interface Mode provides the simplest mode of operation and allows basic con-

trol of the ZMOTION Detection Module II with hardware jumpers and potentiometers. In

this mode, the serial interface is disabled and the trim pots on the Evaluation Board (Sen-

sitivity, Delay and Ambient Light Threshold) are used to control operation.

To enable Hardware Interface Mode and test its basic operation, observe the following

steps.

1. Place SW1 in the HARDWARE position.

2. Turn the AMBIENT potentiometer fully counterclockwise, towards

Light, to set the

ambient light threshold to its maximum brightness, as shown in Figure 2

on page 4.

Essentially, the maximum amount of ambient light will be required to disable the

Motion Detection output (LED). For details about the AMBIENT pot, see the

Ambient Light Threshold

section on page 8.

3. Turn the DELAY potentiometer fully counterclockwise, towards ‘–’, to select the

minimum LED “on” time (2 seconds). For details about the DELAY pot, see the /MD

Output Delay Time section on page 9.

4. Turn the SENSITIVITY potentiometer fully clockwise, towards ‘+’, to select the

maximum motion-detection sensitivity. For details about the SENSITIVITY pot, see

the Sensitivity

section on page 9.

5. Press Reset or apply power.

At this point, ZDM II will power up and check the voltage applied to the TXD/SNS

pin to determine its Interface Mode. With SW1 in the HARDWARE position, the volt-

age on this pin will be between 0 V and 1.8 V and determine its selection to be

Hard-

ware Interface Mode

. This interface mode is detected once, and only after reset,

while the ambient light threshold, delay and sensitivity are monitored continuously.

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