User Guide

Overview

The EVAL-CN0569-PMDZ is a 4-layer printed circuit board (PCB) that allows evaluation of the CN-0569 Infrared Light Angle Sensor Module for Gesture Recognition. The board is fabricated with a 0.5 oz./1 oz. copper cladding (external layers overplated to 1.5 oz.) and IPC-4101 (or IPC-4103) laminates and bonding materials.

Designed to use the I²C Pmod hardware interface, the EVAL-CN0569-PMDZ features a small form-factor with PCB dimensions of 2.7 in (68.58 mm) × 0.8 in (20.32 mm) x 0.062 in (1.5748 mm). The evaluation board uses the standard 1 x 6, 0.1 in (2.54 mm) right-angle male header for I²C Pmod devices. Two 3D-printed optical baffles are included with the EVAL-CN0569-PMDZ for use with the onboard ADPD2140 sensors.

Evaluation Board Hardware

I²C Pmod Connector (P1)

The controller board must be connected to the EVAL-CN0569-PMDZ through the 1 x 6, 0.1 in. (2.54 mm) right-angle header (P1). The pinout of this connector follows the standard I²C Pmod specification, as shown below:

I²C Pmod Connector (P1) Pinout

Pin Number	Pin Name	Pin Function on the EVAL-CN0569-PMDZ
1	INT	General-Purpose Input/Output 0. Actual function depends on the configuration of the ADPD1080 GPIO0 pin.
2	RESET	No connection.
3	SCL	I²C SCL. I²C Clock from the controller board to the ADPD1080.
4	SDA	I²C SDA. I²C Data from the controller board to the ADPD1080.
5	GND	Ground
6	VCC	Pmod VCC. Input power to the EVAL-CN0569-PMDZ.

Note

Connecting Hardware Designed for Digilent I²C Pmod Interface Specification Ver. 1.0.0:

Version 1.0.0 of the Digilent Pmod Interface Specification required 2×4 headers to be used for I²C devices, instead of the 1x6 headers specified by later versions. The EVAL-CN0569-PMDZ can still be used with controller boards that follow this old standard (such as the EVAL-ADICUP3029). In this case however, the INT pin of the evaluation board will have to be manually wired if access to the ADPD1080 GPIO0 pin is needed by an application.

Test Points (Power, GPIO, and LED Driver Pins)

The EVAL-CN0569-PMDZ contains several test points that can be used to connect to the GPIO and LED driver pins of the ADPD1080 photometric front end device.

Test Point	Hardware Pin	Pin Function on the EVAL-CN0569-PMDZ
IO0	ADPD1080 (U3) GPIO0	General Purpose Input/Output 0. Actual function depends on the configuration of the ADPD1080 GPIO0 pin.
IO1	ADPD1080 (U3) GPIO1	General Purpose Input/Output 1. Actual function depends on the configuration of the ADPD1080 GPIO1 pin.
LED1	ADPD1080 (U3) LEDX1	LED 1 Driver Current Sink. Used by the onboard infrared LED by default.
LED2	ADPD1080 (U3) LEDX2	LED 2 Driver Current Sink. Unused by default. Can be connected to an external LED.
LED3	ADPD1080 (U3) LEDX3	LED 3 Driver Current Sink. Unused by default. Can be connected to an external LED.
1V8	ADPD1080 (U3) AVDD/DVDD	1.8 V Supply. Regulated 1.8 V used to power the ADPD1080.
VCC	Pmod VCC	Pmod VCC. Input power to the EVAL-CN0569-PMDZ.
VLED	LED Supply	Supply Voltage for IR_LED. Shorted to Pmod VCC by default.
GND	GND	Ground

The actual functions of the GPIO0 and GPIO1 pins can be set via the registers. For details on the the functions of these pins, please refer to the ADPD1080 datasheet.

Note

IO0 and IO1 are connected directly to the pins of the ADPD1080. Level shifting is needed to interface with these test points if the external circuit does not support 1.8 V logic. GPIO0 is also available via the INT pin of the I²C Pmod connector (P1). When accessed from this pin, the GPIO signal will use the Pmod VCC as its logic level (same as the I²C signals).

If needed by the application, the three LED drivers of the ADPD1080 can be used with external LEDs. To do this, connect the cathode pin of the external LED to any of the LED1, LED2 and LED3 test points. The anode pin of the external LED should be connected to a supply voltage.

Note that LED1 is normally used by the infrared LED (IR_LED) of the EVAL-CN0569-PMDZ. To use this with an external LED instead, the zero Ohm resistor (R1) must be removed first.

Warning

For proper operation with an external LED, the voltage level on the corresponding LED driver test point must not exceed 3.6 V.

Test Points (Photodiode Inputs)

The EVAL-CN0569-PMDZ uses two ADPD2140 sensors spaced 1 in (25.4 mm) apart to implement the gesture sensing algorithm. However, it is possible to modify this distance using by splitting the board into two along the breakaway line and manually wiring the corresponding test points together. Two rows of test points are provided for this application.

Test Point	Hardware Pin	Pin Function on the EVAL-CN0569-PMDZ	Hardware Pin	Test Point
PD5	ADPD1080 (U3) PD5	Photodiode Current Input (Anode) 5	ADPD2140 (U2) XR	XR2
PD6	ADPD1080 (U3) PD6	Photodiode Current Input (Anode) 6	ADPD2140 (U2) XL	XL2
PD7	ADPD1080 (U3) PD7	Photodiode Current Input (Anode) 7	ADPD2140 (U2) YB	YB2
PD8	ADPD1080 (U3) PD8	Photodiode Current Input (Anode) 8	ADPD2140 (U2) YT	YT2
PDC	ADPD1080 (U3) PDC	Photodiode Common Cathode Bias	ADPD2140 (U2) PDC	PDC
GND	GND	Ground	GND	GND

Gesture Sensing Reference Demo and Software

A basic gesture sensing example application for the EVAL-CN0569-PMDZ was developed using the EVAL-ADICUP3029 platform.

Note

For more information on this demo, please refer to the Optical Gesture Sensor Demo page.

Schematic, PCB Layout, Bill of Materials

Download

EVAL-CN0569-PMDZ Design & Integration Files

• Schematic

• Bill of Materials

• Gerber Files

• Assembly Drawing

Registration

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