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參數資料
| 型號： | DDX4100ERRATA |
| 英文描述： | DDX4100 Errata January 17 2002 |
| 中文描述： | DDX4100勘誤表02年1月17日 |
| 文件頁數： | 20/27頁 |
| 文件大小： | 1737K |
| 代理商： | DDX4100ERRATA |
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DDX-4100
Volume
Biquads
Pre-
Scale
Bass
/
Treble
Figure 11: Digital Audio Signal Flow
12.4 Power-down Ctrl/Status Register (PCSR) (address 26h)
D15
D14 D13
D12 D11 D10
EAPD
PR5 PR4
BIT
R/W
RST
NAME
D12
R/W
0
PR4
D9
D8
D7
D6
D5
D4
D3
1
D2
1
D1
1
D0
0
DESCRIPTION
Setting this bit to 1 the BIT_Clk and the SDATA_IN signal
will be fixed to the digital low level. To resume the normal
operation either a hardware reset or a
softReset
must be
performed.
In order to set the device in a power-down-like condition
this bit must be set to 1. This will stop the device internal
clock: only the PL and AC’97, I
C clocks will still be
running. The DSP starts the power-down sequence
(volume fade-out and MUTE).
The value of this bit is checked by the DSP in order to
recognize an external power amplifier power-down
request. As a consequence the DSP starts the power-
down sequence (volume fade-out and MUTE).
D13
R/W
0
PR5
D15
R/W
1
EAPD
NOTE: Bit D0, D3 will be masked to show the value before writing into the RAM register, other bits will simply pass through
.
12.5
Extended Audio ID Register (address 28h) AC’97 Only
D15
D14
D13
D12
D11
D10
D9
D8
0
ID0
0
0
0
0
0
1
The Extended Audio ID is a read-only register that identifies which extended audio features are supported
(see AC’97 revision 2.1 specification, section A2.1). The extended features supported are Variable Rate
PCM Audio (VRA), Double rate PCM Audio (DRA), PCM Center (CDAC), PCM Surround (SDAC) and
PCM LFE (LDAC).
Code ID0, at D14, reports the status of the SA pin. Code ID1, at D15, always reports 0. Hence, the
configurations are primary (00) if SA pin is 0 or Secondary (01) if SA pin is 1.
D7
1
D6
1
D5
0
D4
0
D3
0
D2
0
D1
1
D0
1
20
Details and Specifications are subject to change without notice
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