YMF715E Datasheet, PDF (32/54 Pages) YAMAHA CORPORATION – OPL3 Single-chip Audio System 3

YMF715Eɹɹɹɹɹɹɹɹɹɹɹɹɹɹɹɹɹɹɹɹɹɹɹɹɹɹɹɹ
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)
ɹ9-1-4. MPU401
The followings are the I/Os for MPU401 compatibility.
MPU base
MPU base +1
MPU base + 1
(R/W)
(R)
(W)
MIDI Data port
Status Register port
Command Register port
ɹ9-1-5. OPL3-SA3 control register
This register is used to control the additional functions (ex. power management, wide stereo).
CTRL base
CTRL base +1
(R/W) Index port
(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”.
PSV (power save)...
Set this bit to “0”, before analog power is supplied again.
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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