CY3236A-PIRMOTION Cypress Semiconductor Corp, CY3236A-PIRMOTION Datasheet - Page 2

• Manufacturer Part Number: CY3236A-PIRMOTION
• Description: KIT PIR MOTION DETECT
• Manufacturer: Cypress Semiconductor Corp
• Series: PSoC®r

Specifications of CY3236A-PIRMOTION

• Design Resources: PIR Motion Sensor Board BOM
• Sensor Type: Motion, PIR (Pyroelectric Infrared)
• Interface: Relay
• Sensitivity: Adjustable
• Voltage - Supply: 12V
• Embedded: Yes, MCU, 8-Bit
• Utilized Ic / Part: CY8C27443-24PVXI
• Processor To Be Evaluated: CY8C27443
• Lead Free Status / RoHS Status: Not applicable / Not applicable
• Sensing Range: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Not applicable / Not applicable
• Other names: 428-2022; CY3236A-PIRMOTION

Welcome to the CY3236A-PIRMOTION Evaluation Kit
Thank you for your interest in Cypress’ CY3236A-PIRMOTION Pyroelectric
Infrared Sensor Evaluation Kit. This kit allows you to quickly familiarize
yourself with the PIR board and firmware. Below you will find information
regarding the theory of infrared sensing, as well as some simple kit setup
instructions to get you on your way to using the PIR board. PDF versions of
the User Guide and datasheets for the major parts, along with schematics,
firmware and other design files can be found on the CD-ROM titled
“Pyroelectric Infrared Sensor Evaluation Kit” included with this kit. You must
have Adobe Acrobat reader installed on your PC to view PDF documents.
Theory of Infrared Light Sensing
The theory behind infrared sensing involves the conversion of these infrared light
rays to usable analog and digital signals, which can then be processed using a
microcontroller. In the case of this kit, a Cypress CY8C27443 PSoC is used as the
microcontroller. See the CY8C27443 datasheet included on the Design Files CD-
ROM of this kit.
The human body radiates a certain amount of infrared light undetectable to the
human eye. The length of these rays is in the realm of 10µm. Using a Pyroelectric
Infrared (PIR) sensor like the one manufactured by Glolab Corp., along with the help
of a PSoC microcontroller, these light rays can be converted to an electric charge.
This charge can in turn, be amplified and filtered to produce a digital signal capable
of controlling other hardware such as turning on/off a light, opening or unlocking a
door, or activating an alarm.
Below is a block diagram showing the internal circuitry of the Glolab PIR325 PIR
device along with the external circuitry used in this kit.
The sensor itself consists of a crystalline material that generates an electric charge
when exposed to heat from infrared radiation. This charge gets buffered by an
internal FET whose output can then be fed into a two stage amplifier and a series of
filters to condition the signal. See the PIR325 datasheet included on the Design Files
CD-ROM for more information.
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