MAS3587F datasheet(54/82 Pages) MICRONAS

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MAS 3587F

ADVANCE INFORMATION

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.

Pin PR must be set to ‘1’ when ready to send/receive

data to/from MAS 3587F PIO pins.

PRTR

OUT

Ready

read.

This

signal

indicates

that

the

MAS 3587F is able to receive data in PIO input mode.

PRTW

OUT

Ready to write. This pin indicates that MAS 3587F has

data available in PIO output mode.

EOD

OUT

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.

4.3.7. Serial Input Interface (SDI)

SID

DATA

SII

WORD STROBE

SIC

CLOCK

I2S compatible serial interface A for digital audio data.

This interface can be used for audio input in the

encoder.

4.3.8. Serial Input Interface B (SDIB)

SIBD

DATA

SIBI

WORD STROBE

SIBC

CLOCK

The serial interface B is used as bitstream input inter-

face. The SIBI line must be connected to VSS in the

serial decoder application.

4.3.9. Serial Output Interface (SDO)

SOD

DATA

OUT

SOI

WORD STROBE

OUT

SOC

CLOCK

IN/OUT

Data, Frame Indication, and Clock line of the serial out-

put interface. The SDO is reconfigurable and can be

adapted to several I2S compliant modes.

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).

4.3.11. S/PDIF Output Interface

SPDO

OUT

The SPDO pin provides an digital output with standard

CMOS level that is compliant to the IEC 958 consumer

specification.

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

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.

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.

4.3.13. Analog Output Interfaces

OUTL

OUT

OUTR

OUT

OUTL and OUTR are left and right analog outputs, that

may be directly connected to built-in 16

Ω loudspeak-

ers via 22

Ω series resistance to the headphones as

described in the application information (see Fig. 4–30

on page 79).

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.

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