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ISD1740EY01 Datasheet(PDF) 7 Page - Winbond |
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ISD1740EY01 Datasheet(HTML) 7 Page - Winbond |
7 / 24 page ISD1700 SERIES Publication Release Date: January 23, 2007 - 7 - Revision 1.3-S2 5 PIN DESCRIPTION Refer to Design Guide for details before performing any design or PCB layout. PIN NAME FUNCTIONS VCCD Digital Power Supply : Power supply for digital circuitry. LED LED : An LED output. RESET RESET : When active, the device enters into a known state. MISO Master In Slave Out: Data is shifted out on the falling edge of SCLK. When the SPI is inactive ( SS = high), it’s tri-state. MOSI Master Out Slave In: Data input of the SPI interface when ISD1700 is a slave. Data is latched into the device on the rising edge of SCLK. SCLK Serial Clock: Clock of the SPI interface. SS Slave Select: Selects as a slave device and enables the SPI interface. VSSA Analog Ground : Ground path for analog circuitry. AnaIn AnaIn: Auxiliary analog input to the device for recording or feed-through. MIC+ MIC+: Non-inverting input of the differential microphone signal. MIC- MIC-: Inverting input of the differential microphone signal. VSSP2 Ground : Ground path for negative PWM speaker drive. SP- SP- : The negative Class D PWM speaker output. VCCP Power Supply for PWM Speaker Driver : Power for PWM speaker drive. SP+ SP+: The positive Class D PWM speaker output. VSSP1 Ground : Ground path for positive PWM speaker drive. AUD/AUX Auxiliary Output : Either an AUD (current) or AUX (voltage) output. AGC Automatic Gain Control (AGC) : The AGC adjusts the gain of the microphone preamplifier circuitry. VOL Volume: This control has 8 levels of volume adjustment. ROSC Oscillator Resistor : A resistor determines the sample frequency of the device, which sets the duration. VCCA Analog Power Supply . Power supply for analog circuitry. FT Feed-through: Enable the feed-through path for AnaIn signal to the outputs. PLAY Playback: Plays the recorded message individually, or plays messages sequential in a looping mode. REC Record: When active, starts recording message. ERASE Erase: When active, can erase individual message or do global erase. FWD Forward: Advances to the next message from the current location. INT RDY An open drain output. Can review ready or interrupt status. VSSD Digital Ground : Ground path for digital circuitry |
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