ZEPIR0BAS02MODG datasheet(14/78 Pages) ZILOG

14 / 78 page

PS030504-0917

Signal Descriptions, Serial Interface Mode

ZMOTION® Detection Module II

Product Specification

Motion Detect

An active Low output, Pin 5 (MD) is activated when motion is detected. The duration in

which this signal remains active is set by the DLY signal. This signal is actively driven

High.

• 0 = motion detected

• 1 = no motion detected

Light Gate

A high-impedance analog input, Pin 6 (LG), should be provided with a voltage that is pro-

portional to the amount of ambient light in the environment (typically provided via a CDS

photocell or similar circuit). The signal is used internally to gate the MD output signal

such that it does not activate in the presence of daytime ambient light. When the voltage

on this pin is lower than 1.0V, the MD signal will not activate even when motion is

detected. If MD is in an active state when LG transitions below 1.0V, the current DLY

duration is completed before MD is deactivated. If LG is unused, connect to VDD.

• GND to 1.0V = MD does not activate when motion is detected

• 1.0V to VDD = MD is activated when motion is detected

Sleep Mode

Pin 7 (SLP) is an active Low digital input. When at logic 0, the Module enters low-power

Sleep Mode. The Module does not detect any motion and MD is driven inactive. When

SLP is at logic 1, the Module exits Sleep Mode and begins detecting motion. This signal

must be held at logic 1 during power ON.

• 0 = module disabled; low-power Sleep Mode is active

• 1 = normal operation

Signal Descriptions, Serial Interface Mode

This section describes the signals for operating in Serial Interface Mode.

Ground

Both Pin 1 and Pin 8 ground (GND) signals are tied together on the ZDMII Module and

are connected to power ground.

ZEPIR0BAS02MODG Datasheet(PDF) 14 Page - Zilog, Inc.