ISD-COB17x x x User's Manual
Contents
1. NUVOTON o n ISD COB17x x x User s Manual imaa NTI Fe ee O Sogn 2 gt AUCH Sm SP co OL e 92 i 62 VOL February 2011 Rev 3 1 4 NUVOTON JSS 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 Ordering Code ISD1730 40 50 60 90 120 150 180 210 240 ISD COB17xxx where xxx represents the duration CONTENTS OF THE KIT The ISD COB17xxx COB Demo board Users manual HARDWARE CONNECTIONS e 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 Analn recording or feed through FT is required simply connect the related signal to the Analn and ground points and or connect FT jumper for FT mode e 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 jumper2. at J8 AUD1 AUX for AUD output i SP J4 WO SONC AUD SP 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 15 or last message To Forward to the next message pressing FWD button once will advance to the next message To change the Volume pressing VOL button once will alter one volume level February Rev 3 2 4 NUVOTON JSS 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 Analn signal to output install jumper at J2 then connect signal to Analn terminal SPI Operations For the purpose of saving power the MIC bias circuit has no ground when the REC button is not pressed However this will cause SPI recording have no signal source To fix this and make the SPI interface fully functional please do the following change shown below cut the line at red oval place and connect ground at the green oval place Afte
3. r fixing the board now user can connect the SPI signals to the SPI terminal and start evaluating For other technical details on the ISD1700 series please refer to the datasheet VECA 4 lt yec VSSP2 AUDIAUX VESP uF 1 14 VSSP1 3 1 10uF 45 February 2011 Rev 3 3 4 Vssp2 Gnd plain Vsspl Gnd plain NUVOTON 0 EE PCB LAYOUT PICTURES Dimension 54 mm x 40 mm Vssa Gnd plain Top view Te tt j 8 2 ante prg Vssd Gnd plain Vssa Gnd plain Vssd Gnd plain February 2011 Rev 3 4 4
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