UM022306-1210
P R E L I M I N A R Y
Introduction
ZMOTION
™
Detection Module Development Kit
User Manual
8
provided in the kit to demonstrate this function. When light shines on the photocell, its
resistance decreases, thereby providing a lower voltage to the light gate (LG) signal on the
ZMOTION Detection Module. When the module detects this voltage to be below 1.0 V in
Hardware Mode or the programmed threshold in Serial Mode, the MOTION LED (/MD
signal) will not activate when motion is detected. The AMBIENT potentiometer (R6) sets
the amount of ambient light required to cross the threshold.
Sensitivity
The amount of motion required to trigger the MOTION LED (/MD signal) can be adjusted
using the SENS potentiometer (R3). This adjustment also has the effect of controlling the
range that the detector can
see
—lower sensitivity reduces the range of the detection pat-
tern. The SENS potentiometer provides a voltage between 0 V and 1.8 V to the TXD/SNS
signal on the ZMOTION Detection Module. A higher voltage means lower sensitivity.
The SENS potentiometer is used only in Hardware Interface Mode. In Serial Interface
Mode, the sensitivity is set via commands sent over the serial interface.
/MD Output Delay Time
The amount of time that the MOTION LED (/MD signal) is activated can be controlled by
the DELAY (R4) potentiometer. You can set this range between 2 seconds and 15 minutes.
This feature is typically used in power control applications in which the amount of time
that a device is activated must be controlled. The potentiometer provides a voltage
between 0 V and 1.8 V to the RXD/DELAY input on the ZMOTION Detection Module. A
higher voltage yields a longer activation time.
Hardware and Software Development Support
The ZMOTION Detection Module Development Kit provides support for developing
hardware and software for the module. Signals from the ZMOTION Detection Module are
available to the prototype area as four through-hole connections. 3.3 V (VDD) and ground
are also provided to this area. Do not exceed 90 mA of current draw from the 3.3 V supply.
Software development is supported on the ZMOTION Development Board by using the
Debug connector (J9) with a separately available USB Smart Cable and ZDS II. ZDS II is
Zilog’s integrated development environment (IDE) and is
. The USB Smart Cable provides a means to download and debug the software
developed on ZDS II.
See the
Schematics
section of this User Manual and refer to the
Module Product Specification (PS0284)
for more information about developing your own
hardware and software.