YMF743 Datasheet, PDF (12/24 Pages) YAMAHA CORPORATION – AC’97 Revsion2.1 Audio CODEC with Digital Audio I/F

YMF743
28h : Extended Audio ID (Read Only, Default: 0xxxh)
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
ID1 ID0 -
-
-
- AMAP LDAC SDAC CDAC -
-
-
-
-
-
ID1,ID0.........These bits indicate CODEC ID. The states is determined by setting both No.45 and 46 pins.
When MSEL is high, they are fixed to “Primary ID00”.
ID1# (No.46)
Pin Status Logic Value
ID0# (No.45)
Pin Status Logic Value
CODEC ID
Configuration
OPEN (“H”)
“0”
OPEN (“H”)
“0”
Primary ID00
OPEN (“H”)
“0”
GND (“L”)
“1”
Secondary ID01
GND (“L”)
“1”
OPEN (“H”)
“0”
Secondary ID10
GND (“L”)
“1”
GND (“L”)
“1”
Secondary ID11
AMAP...........This bit is hardwired to “1”. It indicates that the PCM DAC uses data of the standard slot into
twelve slots, as the following table.
CODEC
Slot Number
ID
PCM Left DAC PCM Right DAC
00
3
4
Original definition (master)
01
3
4
Original definition (docking)
10
7
8
Left / Right surround channels
11
6
9
Center / LFE channels
LDAC ...........When PCM DAC uses the LFE channel, this bit is set to “1”.
SDAC ...........When PCM DAC uses the surround channels, this bit is set to “1”.
CDAC ...........When PCM DAC uses the center channel, this bit is set to “1”.
62h : Vendor Function (Read/Write, Default: 0224h)
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
*
*
*
*
*
*
*
*
*
*
*
* TX EXEN *
*
TX.................This bit selects the pin function of No.47.
“0” : EAPD
“1” : DIT
EXEN ...........This bit selects whether EXT24M pin outputs clock or not.
“0” : EXT24M is power down state, and outputs low level.
“1” : EXT24M outputs clock.
The bits except TX and EXEN should not be changed from the default value.
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December 18, 2000