DATA SHEET
MAS 35x9F
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.
specification are used in conjunction with download
software only. A switch at D0:ff6 selects one of these
pins at a time. The SPDIR pin is a common reference
for both input lines (see Fig. 5–1 on page 89).
IN
PR
IN
4.3.11. S/PDIF Output Interface
Pin PR must be set to ‘1’ to validate data output from
MAS 35x9F PIO pins.
SPDO
OUT
The SPDO pin provides an digital output with standard
CMOS level that is compliant to the IEC 958 consumer
specification.
PRTR
OUT
Ready to read. This signal indicates that the
MAS 35x9F is able to receive data in PIO input mode.
PRTW
OUT
4.3.12. Analog Input Interfaces
Ready to write. This pin indicates that MAS 35x9F has
data available for PIO output mode.
In the standard MPEG-decoding DSP firmware the
analog inputs are not used. However, they can be
selected as a source for the D/A converters
EOD
OUT
EOD indicates the end of an DMA cycle in the IC’s PIO
input mode. In ’serial’ input mode it is used as Demand
signal, that indicates that new input data are required.
(set MIX ADC scale of the D/A Converter Source
Mixer, Register 00 06
in Table 3–16).
hex
MICIN
MICBI
IN
IN
4.3.7. Serial Input Interface (SDI)
The MICIN input may be directly used as electret
microphone input, which should be connected as
described in application information (see Fig. 5–1 on
page 89). The MICBI signal provides the supply volt-
age for these microphones.
SID
SII
DATA
WORD STROBE
CLOCK
IN/OUT
IN/OUT
IN/OUT
SIC
2
I S compatible serial interface A for digital audio data.
In the standard firmware this interface is not used.
Note: Please refer to Bit [0] of Table 3–5
INL
INR
IN
IN
INL and INR are analog line-in input lines. They are
connected to the embedded stereo A/D converter of
the MAS 35x9F. The sources should be AC-coupled.
The reference ground for these analog input pins is the
VREF pin.
4.3.8. Serial Input Interface B (SDIB)
SIBD
SIBI
DATA
WORD STROBE
CLOCK
IN
IN
IN
SIBC
The serial interface B is primarily used as bitstream
input interface. The SIBI line must be connected to
VSS in the standard application.
4.3.13. Analog Output Interfaces
OUTL
OUTR
OUT
OUT
OUTL and OUTR are left and right analog outputs, that
may be directly connected to the headphones as
described in the application information (see Fig. 5–1
on page 89).
4.3.9. Serial Output Interface (SDO)
SOD
SOI
SOC
DATA
WORD STROBE
CLOCK
OUT
OUT
IN/OUT
FILTL
FILTR
IN
IN
Data, Frame Indication, and Clock line of the serial
output interface. The SOI is reconfigurable and can be
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.
2
adapted to several I S compliant modes.
4.3.10. S/PDIF Input Interface
SPDI1
SPDI2
SPDIR
IN
IN
IN
SPDIF1 and SPDIF2 are alternative input pins for
S/PDIF sources according to the IEC 958 consumer
Micronas
June 30, 2004; 6251-505-1DS
61
MICRONAS [ MICRONAS ]
