I16-COB20

I16-COB20 User’s Manual April 2006 Rev 1 1/4 DESCRIPTION: The I16-COB20 is used to demonstrate the voice quality of the ISD16B20 ChipCorder series. This board has an empty PDIP socket, so that the desired device can be installed. It can also serve as a prototype board for your initial applications. Product supported Ordering Code ISD1610B/12B/16B/20B I16-COB20 CONTENTS OF THE KIT: − − I16-COB20 COB/Demo board User’s manual 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 COB and/or the device. • Speaker (SP)/AUD selection: Default setting is SP output. If AUD output is needed, remove the connection from center pad to Sp+ (Sp-) pad and re-connect the center pad to AUD (Vcc), respectively, per diagram below. Sp+ Vcc AUD SP- OPERATIONS: In order to perform the recording and playback functions, just connect a speaker and a power supply to the demo board. Please ensure the polarity of the power is correct for avoiding any damages to the demo board. 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 using PlayE, simply pressing PlayE button once will play the message and it stops automatically when completed. During playback, pressing PlayE button again will halt the playback operation. To Playback the recorded message using PlayL, simply pressing-and-holding PlayL button will play the message and it stops automatically when completed. During playback, releasing PlayL button will cease the playback operation. To demonstrate the voice quality and various durations, one can change the Rosc to the desired value with respect to the sampling frequency, as shown in the datasheet. March 12, 2009 Rev 1 2/4 SCHEMATIC: R7 1 KΩ VCCD 2 VCCA 3 R1 4.7 KΩ 4 C1 4.7 μ F C4 0.1 μ F 6 C5 0.1 μF 7 R4 4.7 KΩ R2 VCCD 15 REC VSSD PLAYE PLAYL R3 4.7 KΩ MIC+ 12 C2 μ 1 0.1 F V+ C8 10 μ F C3 VSSA 5 0.1 μ F V- VCCA VCCD VCCP VCCA / VCCP 10 C9 10 μ F ISD1600B V SSP 9 Q1 8050C MIC - 80 K Ω 14 16 DI LED AUD ROSC 13 SP- 8 11 AGC SP+ R5 390 Ω C7 0.1 Aud Solder Pads Vcc +SPK- Electret Microphone LED R6 1 kΩ μF C6 4.7 μ F For any technical details of the ISD1600B series, please refer to the datasheet at: http://www.Nuvoton-usa.com March 12, 2009 Rev 1 3/4 PCB LAYOUT PICTURES: Dimension of PCB: 37.5 mm x 27.7 mm March 12, 2009 Rev 1 4/4