Rainbow Electronics ISD1700 - Manual (Page 7)

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
V
CCD
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.
V
SSA
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.
V
SSP2
Ground : Ground path for negative PWM speaker drive.
SP- SP- : The negative Class D PWM speaker output.
V
CCP
Power Supply for PWM Speaker Driver : Power for PWM speaker drive.
SP+ SP+: The positive Class D PWM speaker output.
V
SSP1
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.
R
OSC
Oscillator Resistor : A resistor determines the sample frequency of the
device, which sets the duration.
V
CCA
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.
V
SSD
Digital Ground : Ground path for digital circuitry