ISD1700 SERIES
5 PIN DESCRIPTION
Refer to Design Guide for details before performing any design or PCB layout.
PIN NAME
V
CCD
LED
RESET
FUNCTIONS
Digital Power Supply:
Power supply for digital circuitry.
LED:
An LED output.
RESET:
When active, the device enters into a known state.
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.
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.
Serial Clock:
Clock of the SPI interface.
Slave Select:
Selects as a slave device and enables the SPI interface.
Analog Ground:
Ground path for analog circuitry.
AnaIn:
Auxiliary analog input to the device for recording or feed-through.
MIC+:
Non-inverting input of the differential microphone signal.
MIC-:
Inverting input of the differential microphone signal.
Ground:
Ground path for negative PWM speaker drive.
SP-:
The negative Class D PWM speaker output.
Power Supply for PWM Speaker Driver:
Power for PWM speaker drive.
SP+:
The positive Class D PWM speaker output.
Ground:
Ground path for positive PWM speaker drive.
Auxiliary Output:
Either an AUD (current) or AUX (voltage) output.
Automatic Gain Control (AGC):
The AGC adjusts the gain of the
microphone preamplifier circuitry.
Volume:
This control has 8 levels of volume adjustment.
Oscillator Resistor:
A resistor determines the sample frequency of the
device, which sets the duration.
Analog Power Supply.
Power supply for analog circuitry.
Feed-through:
Enable the feed-through path for AnaIn signal to the
outputs.
Playback:
Plays the recorded message individually, or plays messages
sequential in a looping mode.
Record:
When active, starts recording message.
Erase:
When active, can erase individual message or do global erase.
Forward:
Advances to the next message from the current location.
An open drain output. Can review ready or interrupt status.
Digital Ground:
Ground path for digital circuitry
Publication Release Date: January 23, 2007
Revision 1.3-S2
MISO
MOSI
SCLK
SS
V
SSA
AnaIn
MIC+
MIC-
V
SSP2
SP-
V
CCP
SP+
V
SSP1
AUD/AUX
AGC
VOL
R
OSC
V
CCA
FT
PLAY
REC
ERASE
FWD
RDY INT
V
SSD
-7-
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