参数资料
型号: MAS3587F
厂商: Electronic Theatre Controls, Inc.
元件分类: 通用总线功能
英文描述: MPEG Layer 3 Audio Encoder/Decoder
中文描述: MPEG层3音频编码器/解码器
文件页数: 36/83页
文件大小: 734K
代理商: MAS3587F
MAS 3587F
ADVANCE INFORMATION
36
Micronas
D0:7f1
(continued)
Main I/O Control, continued
bit[1]
Decoder:
0 (reset)
DEMAND MODE (PLL off, MAS 3587F is clock
master)
BROADCAST MODE (PLL on, clock of MAS 3587F
locks on data stream)
1
Encoder:
SDI Word Strobe Invert
0 (reset)
do not invert
1
invert incoming word strobe signal
Note:
L/R channel swap is present today with the reset value. Correct value
for encoder is
1
. Correct default channel setting will be implemented in future
versions.
bit[0]
Validate
0 (reset)
1
changes in control memory will be ignored
changes in control memory will become effective
Bit[0] is reset after the DSP has recognized the changes. The controller
should set this bit after the other D0 control memory cells have been initialized
with the desired values.
D0:7f2
Interface Status Control
(reset = 05
hex
)
This control cell allows to enable/disable the data I/O interfaces. In addition,
the clock of the output data interfaces, S/PDIF and SDO, can be set to a low-
impedance mode.
All
bit[6]
S/PDIF input selection
0 (reset)
1
select S/PDIF input 1
select S/PDIF input 2
bit[5]
Enable/disable S/PDIF output
0 (reset)
enable S/PDIF output
1
S/PDIF output off (tristate)
Note that
S/PDIF audio output is only available for MPEG 1 (sampling fre-
quencies 32, 44.1 and 48 kHz)
bit[4]
Reserved, must be set to zero
bit[3]
Enable/disable serial data output SDO
0
SDO on
1 (reset)
SDO off
bit[2]
Output clock characteristic (SDO and S/PDIF outputs)
0
low impedance
1 (reset)
high impedance
bit[1]
reserved, must be set to zero
bit[0]
Enable/disable external serial data input SDI
0
use external audio source (SDI)
1 (reset)
use internal A/D converter as audio source
Both digital outputs, S/PDIF and SPO, and the D/A converters may use the
outgoing audio independent of each other.
Changes at this memory address must be validated by setting bit [0] of D0:7f1.
InterfaceControl
Table 3
7:
D0 Control Memory Cells
Memory
Address
(hex)
Function
Name
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