
YMF753
March 6, 2001
7
02h : Master Volume (Read/Write, Default: 8000h)
D15
D14
D13
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
Mute
-
ML5-0
-
MR5-0
Mute..............Setting this bit to “1” mutes both left and right channels of the line output.
ML5-0...........These bits determine the volume level of the line output left channel by 1.5dB step. The volume
range is from 0dB to -46.5dB. When all bits are set to “0”, volume is maximum (0dB) and when
they are set to “011111b”, volume is minimum (-46.5dB). And when ML5 bit is set to “1”, the
volume level is minimum (-46.5dB), then their status become “011111b”.
MR5-0...........These bits determine the volume level of the line output right channel by 1.5dB step.
Setting to them is the same as the upper ML5-0 bits.
04h : LNLVL Volume (Read/Write, Default: 0000h)
D15
D14
D13
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
-
Though the register can be written any value, it does not function.
0000h is always read out.
06h : Master Volume Mono (Read/Write, Default: 8000h)
D15
D14
D13
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
Mute
-
MM5-0
Mute..............Setting this bit to “1” mutes the monaural output.
MM5-0..........These bits determine the volume level of the monaural output by 1.5dB step. The volume range
is from 0dB to -46.5dB. When all bits are set to “0”, volume is maximum (0dB) and when they
are set to “011111b”, volume is minimum (-46.5dB). And when MM5 bit is set to “1”, the
volume level is minimum (-46.5dB), then their status become “011111b”
08h : Master Tone (Read/Write, Default: 0707h)
D15
D14
D13
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
-
BA2-0
-
TR2-0
BA2-0 ...........These bits determine the bass level by 1.5dB step. The tone range is from 0dB to +10.5dB.
When all bits are set to “0”, tone is maximum (+10.5dB) and when all bits are set to “1”, tone is
minimum (0dB)
TR2-0............These bits determine the treble level by 1.5dB step. Setting to them is the same as the upper
BA2-0.