MAS3506D datasheet(10/52 Pages) MICRONAS

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MAS 3506D

PRELIMINARY DATA SHEET

Micronas

2.5. Interfaces

The MAS 3506D uses an I2C control interface, a serial

input interface for the Broadcast Channel, and a digital

audio output interface for the decoded audio data (I2S

or similar). Additionally, a general-purpose parallel I/O

interface (PIO) may be used for monitoring and mode-

selection tasks. The PIO lines are controlled by the

internal firmware.

2.5.1. Broadcast Channel (BC) Input Interface

The BC input interface consists of the three pins SIC,

SII, and SID. For WorldSpace operation the SII pin is

always to be connected to VSS. The Broadcast Chan-

nel input signal format is shown in Figure 2–4. The

data values are latched with the falling edge of the SIC

signal. The input interface is asynchronous and

accepts data streams generated by the DRD 3515A

BC output.

Fig. 2–4: Schematic timing of the SDI (BC) input

The BC input can be switched to an alternate port.

This function is controlled by input pin PI18. For more

details please see Section 3.1.3. on page 13

Fig. 2–5: DC/DC converter connections

765 43210

tSICLK

tbw

BCC

→(SIC)

BCD

→(SID)

0...15

32...47

64...94

−

VSS

AVSS

AVDD

VDD

CLKI

DCSO

DCSG

DCEN

PUP

WSEN

VSENSE

47 k

Ω

47 k

Ω

Power-On

Push Button

10 k

Ω

10 nF

DC/DC

converter

voltage

monitor

Start-up

oscillator

µController

µH

VIN ≥ 0.9 V

COUT

330

µF

Low ESR

CIN

330

µF

DCCF

8ehex

optional

filter

Start-up

oscillator

+32

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