september 2006 rev 2 1/4 ISD-COB17x x x user?s manual
september 2006 rev 2 2/4 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 demons trate 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 ? user?s manual hardware connections: ? connect a speaker and a power supply to the rela ted 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 re quired, 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 inst all a jumper at j8 (aud1-aux) for aud output. operations: standalone operations: to record, simply press-and-hold the rec button and speak to the micropho ne. the led stays on while recording. release record button to stop recording. to playback the recorded message, pressing pla y button once plays the message and it stops automatically when completed. during playback, pressing pla y 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 1 st or last message. to forward to the next message, pressing fwd button once will advance to the next message. sp+ aud sp- vcc j4 j5
september 2006 rev 2 3/4 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 t he 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 sp i terminal and start running the program. for other technical details on the isd1700 series, please refer to the datasheet. schematic:
september 2006 rev 2 4/4 pcb layout pictures: dimension: 54 mm x 40 mm top view: rear view:
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