Yamaha specifications 9-1-4.MPU401, OPL3-SA3control register, YMF715E, Power Management R/W

YMF715E

Mixer default:

02h:AUX1L = 88h (mute) 03h:AUX1R = 88h (mute) 04h:AUX2L = 05h (+4.5dB) 05h:AUX2R = 05h (+4.5dB) 06h:DACL = 80h (mute) 07h:DACR = 80h (mute) 12h:LineL = 88h (mute) 13h:LineR = 88h (mute) 1Ah:MonoIn = C0h (mute)

9-1-4. MPU401

The followings are the I/Os for MPU401 compatibility.

MPU base	(R/W)	MIDI Data port
MPU base +1	(R)	Status Register port
MPU base + 1	(W)	Command Register port

9-1-5. OPL3-SA3 control register

This register is used to control the additional functions (ex. power management, wide stereo).

	CTRL base		(R/W)		Index port
	CTRL base +1		(R/W)		Data port
Power Management (R/W):
	Index	D7	D6		D5	D4	D3	D2	D1	D0
	01h	“0”	“0”		ADOWN	“0”	“0”	PSV	PDN	PDX
	ADOWN (Analog Down)... Analog power supplies can be removed from OPL3-SA3, if
				ADOWN=“1”.
				Set this bit to “0”, before analog power is supplied again.
	PSV (power save)...			Setting this bit to “1” makes OPL3-SA3 in power save mode
				that is categorized into two types.

Power save mode 1

where PSV=PDX=”1”, clock oscillation is disabled and power dissipation of digital portion becomes about 100uA(typ.), and that of analog portion becomes about 5mA(typ.).

Power save mode 2

where PSV=”1” and PDX=0, clock oscillation is active. However power dissipation of digital portion becomes about 10mA(typ.), and that of analog portion becomes about 5mA(typ.).

PDN (Power down)...	Setting this bit to “1” makes in power down mode.
PDX (Oscillation stop)...	Setting this bit to “1” makes the clock oscillation halt.
default : 00h

May 21, 1997

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