FDA803D datasheet(29/78 Pages) STMICROELECTRONICS

29 / 78 page

DocID031487 Rev 2

29/78

FDA803D

Muting function architecture

FDA803D uses a mixed signal approach for muting function.

Muting function is activated by different "mute command signal":



“High voltage mute”: active when Vcc enters in a voltage window over the max voltage;

the window is specified in the electrical parameters table.



“Low Battery mute”: active when Vcc enters in a voltage window under the min voltage;

the window is specified in the electrical parameters table.



“Hardware mute”: active when HWMute pin enters in the voltage window specified in

the electrical parameters table.



Thermal mute”: active when temperature enters in the temperature window over the

max temperature; the window is specified in the electrical parameters table.



“I2C Mute”: active user select mute/play I2C bits.

The mute is achieved by the combination of two separated actuators, “Analog-mute” and

“Digital-mute”.

8.1

Command dependence

Analog and digital mute actuators activation could be different based on the mute command

signal. This is described in the following table:

Table 7. Command dependence

Command signal

When?

Mute

Unmute

Low Battery mute

When Vcc enters inside

the low battery mute

window

Mixed mute. Analog &

Digital, at the same

time (1)

1. User can decide to disable Digital-Mute/Unmute using bit IB13-d6; in this case in all the conditions, (except

I2C Mute), the Mute/Unmute will be purely Analog.

Digital (1)

High Voltage mute

When Vcc enters inside

the high voltage mute

window

Mixed mute. Analog &

Digital, at the same

time (1)

Digital (1)

Thermal Mute

When temperature

enters inside thermal

mute window

Analog

Hardware Mute

When hardware pin

voltage enters inside its

mute window

Mixed mute. Analog &

Digital, at the same

time(1)

Digital (1)

I2C Mute

When I2C mute bits are

selected

Digital

FDA803D 데이터시트(PDF) 29 Page - STMicroelectronics

FDA803D 데이터시트(HTML) 29 Page - STMicroelectronics

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78

데이터시트 다운로드

링크 URL