YMF743 Datasheet, PDF (13/24 Pages) YAMAHA CORPORATION – AC’97 Revsion2.1 Audio CODEC with Digital Audio I/F

YMF743
64h : ZV Port Volume (Read/Write, Default: 8848h or C848h)
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
Mute MSEL -
GL4-0
ZEN ZAC -
GR4-0
Mute..............Setting this bit to “1” mutes both left and right channels of the ZV port.
MSEL ...........This bit is read only, and indicates the status of No.40 MSEL pin.
“0” : Low
“1” : High
GL4-0 ...........These bits determine the volume level of the ZV port left channel by 1.5dB step. The volume
range is from +12dB to -34.5dB. When all bits are set to “0”, volume is maximum (+12dB) and
when all bits are set to “1”, volume is minimum (-34.5dB).
ZEN ..............This bit selects whether ZV port is used or not.
“0” : ZV port is power down state, and can not be used.
“1” : ZV port can be used.
ZAC ..............This bit is read only, and indicates whether the bit clock (ZV_BCK) is input to ZV port or not.
“0” : The bit clock (ZV_BCK) is not input.
“1” : ZV port is active because the bit clock (ZV_BCK) is input.
GR4-0 ...........These bits determine the volume level of the ZV port right channel by 1.5dB step.
Setting to them is the same as the upper GL4-0 bits.
66h : DIT Control (Read/Write, Default: 0000h)
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
C15 C14 C13 C12 C11 C10 C9 C8 C5 C4 C3 C2 C1 DMU UDS DEN
C15-8 ............These bits determine Category Code of C-bit (channel status) output from DIT. Normally, set to
10011010b, whose value means “Sampling rate converter, Commercially released pre-recorded
software”.
C5-1 ..............These bits determine Control Code of C-bit (channel status) output from DIT.
Copyright Protection
Audio Data
Digital Data
Copyright
00000b
00001b
No Copyright
00010b
00011b
DMU.............Setting this bit to “1” mutes audio data output from DIT.
UDS ..............This bit selects the data output from DIT.
“0” : Data from the AC-Link
“1” : Data from A/D converter
DEN..............This bit selects whether the SPDIF signal is output from DIT or not.
“0” : DIT is power down state, and outputs low level.
“1” : SPDIF signal is output from DIT.
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December 18, 2000