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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： | 54/83页 |
| 文件大小： | 734K |
| 代理商： | MAS3587F |
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MAS 3587F
ADVANCE INFORMATION
54
Micronas
4.3.6.1. PIO Handshake Lines
PCS
The PIO chip select PCS must be set to
‘
0
’
to activate
the PIO in operation mode.
IN
PR
Pin PR
must be set to
‘
1
’
when ready to send/receive
data to/from MAS 3587F PIO pins.
IN
PRTR
Ready to read. This signal indicates that the
MAS 3587F is able to receive data in PIO input mode.
OUT
PRTW
Ready to write. This pin indicates that MAS 3587F has
data available in PIO output mode.
OUT
EOD
EOD indicates the end of an DMA cycle in the IC
’
s PIO
input/output mode. In
’
serial
’
input mode it is used as
Demand signal, that indicates that new input data are
required.
OUT
4.3.7. Serial Input Interface (SDI)
SID
SII
SIC
I
2
S compatible serial interface A for digital audio data.
This interface can be used for audio input in the
encoder.
DATA
IN
IN
IN
WORD STROBE
CLOCK
4.3.8. Serial Input Interface B (SDIB)
SIBD
SIBI
SIBC
The serial interface B is used as bitstream input inter-
face. The SIBI line must be connected to VSS in the
serial decoder application.
DATA
IN
IN
IN
WORD STROBE
CLOCK
4.3.9. Serial Output Interface (SDO)
SOD
SOI
SOC
Data, Frame Indication, and Clock line of the serial out-
put interface. The SDO is reconfigurable and can be
adapted to several I
2
S compliant modes.
DATA
OUT
OUT
WORD STROBE
CLOCK
IN/OUT
4.3.10. S/PDIF Input Interface
SPDI1
SPDI2
SPDIR
SPDIF1 and SPDIF2 are alternative input pins for
S/PDIF sources according to the IEC 958 consumer
specification. A switch at D0:7f2 selects one of these
pins at a time. The SPDIR pin is a common reference
for both input lines (see Fig. 4
–
31 on page 80).
IN
IN
IN
4.3.11. S/PDIF Output Interface
SPDO
The SPDO pin provides an digital output with standard
CMOS level that is compliant to the IEC 958 consumer
specification.
OUT
4.3.12. Analog Input Interfaces
The analog inputs are used in the standard MPEG
encoding DSP firmware. They can also be selected as
a source for the D/A converters (refer to audio codec
register 00 07
hex
(see Table 3
–
12 on page 43)).
MICIN
MICBI
The MICIN input may be directly used as electret
microphone input, which should be connected as
described in application information. The MICBI signal
provides the supply voltage for these microphones.
IN
IN
INL
INR
INL and INR are analog line-in input lines. They are
connected to the embedded stereo A/D converter of
the MAS 3587F. The sources should be AC coupled.
The reference ground for these analog input pins is the
VREF pin.
IN
IN
4.3.13. Analog Output Interfaces
OUTL
OUTR
OUTL and OUTR are left and right analog outputs, that
may be directly connected to built-in 16
loudspeak-
ers via 22
series resistance to the headphones as
described in the application information (see Fig. 4
–
30
on page 79).
OUT
OUT
FILTL
FILTR
Connection to input terminal of output amplifier.Can be
used to connect a capacitance from OUTL respectively
OUTR to FILTL respectively FILTR in parallel to feed-
back resistor and thus implement a low pass filter to
reduce the out-of-band noise of the DAC.
IN
IN
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