ISD-COB17

ISD-COB17x x x User’s Manual September 2006 Rev 2 1/4 DESCRIPTION: The ISD-COB17xxx is a COB/demo board for ISD1700 series. It has either an ISD17xxx die or ISD17xxx SOIC unit assembled, where xxx represents the duration, to demonstrate the functionalities and voice quality of the ISD1700 device. The default settings for sampling frequency and output are 8kHz and PWM speaker outputs, respectively. Product supported ISD1730 / 40 / 50 / 60 / 90 / 120 / 150 / 180 / 210 / 240 where xxx represents the duration CONTENTS OF THE KIT: − − The ISD-COB17xxx COB/Demo board User’s manual Ordering Code ISD-COB17xxx HARDWARE CONNECTIONS: • • • Connect a speaker and a power supply to the related terminals. Please ensure the polarity of the power is correct to avoid any damages to the demo board. When AnaIn recording or feed-through (FT) is required, simply connect the related signal to the AnaIn and ground points and/or connect FT jumper for FT mode. Speaker/AUD selection: Default setting is speaker output. If AUD is needed, remove the connection from center pad to Sp- (Sp+) pad of J4 (J5) and re-connect the center pad to Vcc (AUD) of J4 (J5), as shown below. Also, need to install a jumper at J8 (AUD1-AUX) for AUD output. Vcc J4 J5 AUD OPERATIONS: Standalone Operations: To Record, simply press-and-hold the REC button and speak to the microphone. The LED stays on while recording. Release Record button to stop recording. To Playback the recorded message, pressing PLAY button once plays the message and it stops automatically when completed. During playback, pressing PLAY button again will halt the playback operation. While playback operation, the LED flashes. To Erase a message, simply pressing ERASE button will erase the message when it is the 1st or last message. To Forward to the next message, pressing FWD button once will advance to the next message. SP- SP+ September 2006 Rev 2 2/4 To change the Volume, pressing VOL button once will alter one volume level. To Reset the device, pressing RESET button will bring the device back to its default state. To vary the sampling frequency, change the Rosc (R5) to the desired value. To feed-through (FT) AnaIn signal to output, install jumper at J2, then connect signal to AnaIn terminal. SPI Operations: Simply connect the SPI signals to the SPI terminal and start running the program. For other technical details on the ISD1700 series, please refer to the datasheet. SCHEMATIC: September 2006 Rev 2 3/4 PCB LAYOUT PICTURES: Dimension: 54 mm x 40 mm Top view: Rear view: September 2006 Rev 2 4/4