Sony S530D manual Audio DSP IC501

Serial Bus 1

Bus 1 is used for communications between:

·System Control IC202

·Audio DSP IC501

·Audio 2 channel IC902

·Front, Rear, and Center D/A converters IC905 to IC907

System Control IC202 is the master IC. It sends and receives data on the serial data in (SI1, at IC202/pin 79) and out (SO1, at IC202/pin 80) lines. The data is always accompanied by serial clock (SC1, at IC202/pin 89) from IC202. There are always communications present at IC202/pins 79,80 and 89 as long as there is power applied just like in serial bus 0.

Audio DSP IC501

Bi-directional communications between System Control IC202 and IC501 is similar to that with EEProm IC201. Communications between System Control IC202 and Audio DSP IC501 are accomplished using:

·Two serial data lines (SO1 and SI1)

·Clock from IC202/pin 89

·Chip Select from IC601/pin 28

Periodically in IC202’s routine, Audio DSP IC501 is chip selected. When the chip select pin 62 line is brought low, data is transferred between the ICs on the data lines (SO1 and SI1).

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IC Function

IC Name	Number	Function
System Control	IC202	Main Micro
Interface	IC201-FL101	Accepts user commands
	Bd	(play, open tray, next, etc)
EEProm	IC201-MB85 Bd	Stores servo info
Audio DSP	IC501	Delays (echoes) for speaker
		effects
Audio 2 channel D/A	IC902	D/A Converter for analog
Converter		audio
Front, Rear, Center,	IC905 - IC907	D/A Converter for 5.1 AC-3
D/A Converter		signal.

Audio 2 Channel D/A Converter IC902

Audio Front, Rear, and Center D/A Converters IC905 - IC907

System Control IC202 communicates with the remainder of the ICs on the serial bus 1 lines in a unidirectional manner. Each one of these D/A Converters has an individual chip select line from IC601. The SO1 data line from IC202/pin 80 is common to the D/A Converters. Data applies only to the D/A Converter when its chip line is low. The data as always is accompanied by bit clock from IC202/pin 89.