SM5879AV datasheet(14/20 Pages) NPC

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SM5879AV

NIPPON PRECISION CIRCUITS—14

Microcontroller Interface

For microcontroller setting (when P/M is HIGH), the

microcontroller interface consisting of MDT (data),

MCK (clock) and MLEN (latch enable) can be used.

Data from the microcontroller is input to the input-

stage shift registers at the rise of MCK. Changes in

MDT should be performed at the rise of MCK.

Serial data in the shift registers is latched in parallel

to the ﬂag registers at the rise of MLEN.

Two ﬂag registers are available, divided into the

attenuation factor and mode ﬂag by the D7 data.

A0 to A6: Attenuation factor (A6: MSB)

FDEM: Deemphasis ON/OFF (ON when 1)

FBB1: Bass boost setting switch ﬂag 1

FBB2: Bass boost setting switch ﬂag 2

MONO: Stereo/mono setting (Mono when 1)

CSEL: Mono output channel selection

(Right channel when 1)

Figure 4. Format of microcontroller interface input

MLEN

MCK

MDT

Table 2. microcontroller setting ﬂags

Microcontroller

serial data

Flag

FDEM

FBB1

FBB2

MONO

CSEL

SM5879AV Datasheet(PDF) 14 Page - Nippon Precision Circuits Inc