TDA7417 datasheet(14/34 Pages) STMICROELECTRONICS

부품명	TDA7417

상세설명	Car radio audio processor

PDF	34 Pages

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제조업체	STMICROELECTRONICS [STMicroelectronics]

홈페이지	http://www.st.com

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14 / 34 page

Description of the audioprocessor

TDA7417

14/34

AutoZero-Remain

In some cases, for example if the µP is executing a refresh cycle of the IIC-Bus-

programming, it is not useful to start a new AutoZero-action because no new source is

selected and an undesired mute would appear at the outputs. For such applications, it can

be switched in the AutoZero-Remain-Mode (Bit 6 of the subaddress-byte). If this bit is set

to high, the AutoZero will not be invoked and the old adjustment-value remains.

4.3

Loudness

There are four parameters programmable in the loudness stage:

4.3.1

Attenuation

Figure 4 shows the attenuation as a function of frequency at fP = 400Hz.

Figure 4.

Loudness Attenuation @ fP = 400Hz

4.3.2

Peak Frequency

Figure 5 shows the four possible peak-frequencies at 400, 800 and 2400Hz.

Figure 5.

Loudness Center frequencies @ Attn. = 15dB

TDA7417 데이터시트(PDF) 14 Page - STMicroelectronics