BH3874AKS2 查看數據表（PDF） - ROHM Semiconductor

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BH3874AKS2

Sound processor IC

ROHM Semiconductor 

Audio ICs

BH3874AKS2

(4) Relation of the serial data and 33pin capacitor

The interval γ of the data and the data can be more shortly set by changing the capacitor of 33pins.

(Ex. When making the changing speed of VOLUME faster)

The relation between the interval γ of the data and the data and the capacitor of 33pin is as follows.

33pin Capacitor

The interval of the data and

the next data

0.047µF

0.1µF

0.22µF

More than 25ms

More than 50ms

More than 100ms

Note: It is possible to do the interval of the data and the next data more shortly by changing

33pin capacitor into 0.047µF. However, the switching sound becomes rather bigger

than the switching sound of setting 0.1µF about the switching sound of VOLUME,

DBASS, SURROUND, MODE SELECTOR.

(5) Others

If there is common impedance in GND of the IC, the switching sound something occurs by changing the mode.

Wiring pattern of SI and SCK shall be away from that of analog unit and cross talk shall not be acceptable.

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