ZEPIR0BAS02MODG datasheet(13/78 Pages) ZILOG

13 / 78 page

PS030504-0917

Signal Descriptions, Hardware Interface Mode

ZMOTION® Detection Module II

Product Specification

Delay

A high-impedance analog input, Pin 3 (RXD/DLY), sets the duration for the Motion

Detect (MD) pin to remain active when motion has been detected. Provide a voltage

between 0V and 2V to select a delay of 2 seconds to 15 minutes (see Table 2). Typically,

a simple resistor divider or trim pot is used to set the voltage.

Sensitivity

A high-impedance analog input, Pin 4 (TXD/SNS) sets the Module’s sensitivity to motion.

Provide a voltage between 0V and 1.8V to adjust the sensitivity to meet the application

requirements. A lower voltage means higher sensitivity. Typically, a simple resistor

divider or trim pot is used to set the voltage.

• 1.8V = lowest sensitivity

• 0V = highest sensitivity

This signal also determines the interface mode of the Module. At power ON, and when

exiting Sleep Mode, the signal is sampled; if it is greater than 2.5V (for example, pulled to

VDD via resistor), then the system enters Serial Interface Mode and the pin is converted to

TXD. If the signal is between 0V and 1.8V, Hardware Interface Mode is selected.

Table 2. Delay Time and Voltage on DLY

Delay Time

Voltage on DLY

2 sec

5 sec

0.2V

10 sec

0.4V

30 sec

0.6V

1 min

0.8V

2 min

1.0V

3 min

1.2V

5 min

1.4V

10 min

1.6V

15 min

1.8V

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