Sony S530D manual HGA IC601 to Servo IC701, Sdcps

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IC202 to IC601 Communications

Signal	Active	Signal Present when
Chip Select (CS1 or CS4)	Low	IC202 & IC205 gets Vcc
Clock IC202/pin 5	Low	IC202 gets B+
Write IC202/pin 22	Low	IC202 & IC205 gets Vcc
Six Address lines HA 0-5		IC202 gets B+
16 Data lines HD 0-15		IC202 gets B+

When IC601 wants to send reply data to IC202, an interrupt signal is sent to IC202. When IC202 is ready, it will send chip select, clock, read pulses and address to support the data received from IC601.

IC601 to IC202 Communications

Signal	Active	Signal Present when
Interrupt (INT1 or INT3)	Low	An operation is completed
		(e.g. sled moved)
Chip Select (CS1 or CS4)	Low	IC202 and IC205 gets Vcc
Clock IC202/pin 5	Low	IC202 gets B+
Read IC202/pin 24	Low	IC202 and IC205 gets Vcc
Six Address lines HA 0-5		IC202 gets B+
16 Data lines HD 0-15		IC202 gets B+

HGA IC601 to Servo IC701

Bi-directional communications between these two ICs is similar to that described for IC202 and IC601. The differences are in the IC pin num- bers and that IC601-IC701 communications are only taking place when a servo command is changed.

IC601 to IC701 Communications

	Signal				Active		Signal Present when
Chip Select (SDCPS					Low		Power on/off, Tray in/out,
IC601/pin 118)							disc playback
Clock Input IC701/pin 108					Low		3.3V is present
Write (SDPWR IC601/pin					Low		Power on/off, Tray in/out,
116)							disc playback
Two Address lines HA 0-1							IC202 gets Vcc
8 Data lines HD 0-7							IC202 gets Vcc
		IC701 to IC601 Communications
	Signal			Active			Signal Present when
Interrupt (HINT			from	Low		An operation		is completed
IC701/pin 128)						(e.g. sled moved)
Chip	Select	(SDCPS		Low		Power on/off,		Tray	in/out,
from IC601/pin 118)						disc playback
Clock	Input	IC701/pin		Low		3.3V is present
108
Read	from	IC601/pin		Low		Power on/off,		Tray	in/out,
117						disc playback
Two	Address	lines	HA			IC202 gets Vcc
0-1
8 Data lines HD 0-7						IC202 gets Vcc