TDA7406T datasheet(12/49 Pages) STMICROELECTRONICS

部件名	TDA7406T

功能描述	CAR RADIO SIGNAL PROCESSOR

PDF	49 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

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12 / 49 page

TDA7406T

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Figure 4. 1st and 2nd Order Loudness @ Attn. = 15dB, fP=400Hz

2.4 Soft Mute

The digitally controlled Soft Mute stage allows signal muting/demutingwith a programmable slope. The Mute

time is selectable among 4 values: 0.48, 0.96, 123 and 324ms. The mute process can either be activated by the

Soft Mute pin or via the I

2C-bus. This slope is realized in a special S-shaped curve to mute slow in the critical

regions (see Figure 5).

For timing purposes the I

2C-bus output register (Bit0 = SM read bit) is set to 1 from the start of muting until the

end of de-muting.

Figure 5. Soft Mute-Timing

Note: Please notice that a started Mute-action is always terminated and could not be interrupted by a change of the mute -signal.

-20.0

-15.0

-10.0

-5.0

0.0

10.0

100.0

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TDA7406T 数据表(PDF) 12 Page - STMicroelectronics