PIC and voice chip isd4003

Using PIC16f876 SPI to control the Voice Chip ISD4003
Schematic Diagram for teh ISD4003 voice chip. Works Great. Circuit works on 3V Click here for the source code New source code ( using basic memory segmentation )	IMPORTANT NOTE: The pictures shown in the oscilloscope show a data burst starting at the raising edge of the clock. It SHOULD BE ON THE FALLING EDGE instead. Using this commmand: setup_spi(SPI_MASTER \| SPI_H_TO_L \| SPI_CLK_DIV_16 ); Ernesto	Hits to this page.
snap shots from the oscilloscope are down here	MOSI Control Bytes PIC sents MSB first In oscciloscope bits are read from left to right Ao, A1, .. A10,Co, ... C4
Blue channel indicates clock signal generated by the PIC16F876 Yellow channel indicates data sent to D4003	POWER UP Voice Chip Address byte: 00000000 Instruction Byte: 00100000 RUN = 0 = ns PLAY/RECORD = 0 = ns PU = 1 = POWER UP IAB = 0 = ns
Blue channel indicates clock signal generated by the PIC16F876 Yellow channel indicates data sent to ISD4003	RECORD at Address A0-A10 Address byte: 00000000 Instruction Byte: 10100000 RUN = 1 PLAY/RECORD = 0 = RECORD PU = 1 = Already On IAB = 0 = Use Address
Blue channel indicates clock signal generated by the PIC16F876 Yellow channel indicates data sent to ISD4003	STOP Playing or Recording Address byte: 00000000 Instruction Byte: 00110000 RUN = 0 = STOP PLAY/RECORD = 0 = ns PU = 1 = Already On IAB = 1 = Ignore address bit
Blue channel indicates clock signal generated by the PIC16F876 Yellow channel indicates data sent to ISD4003	PLAY at Address A0-A10 Address byte: 00000000 Instruction Byte: 11100000 RUN = 1 = RUN PLAY/RECORD = 1 = PLAY PU = 1 = Already On IAB = 0 = Use address
Blue channel indicates clock signal generated by the PIC16F876 Yellow channel indicates SS pin on ISD4003	Slave Select Signal. This picture shows SS pin on the ISD4003 when data is transmitted from PIC16f87 to it using SPI I give enough time before transmitting data.

Any comments? e-mail me: earroyo@media.mit.edu

Last Update: 10/27/2003