ST5090TQFPTR 查看數據表（PDF） - STMicroelectronics

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ST5090TQFPTR

LOW VOLTAGE 14-BIT LINEAR CODEC WITH HIGH-PERFORMANCE AUDIO FRONT-END

STMicroelectronics 

Table 7: Control Register CR5 Functions

7654

Transmit amplifier

0000

0001

-

-

-

-

1111

3210

Sidetone amplifier

0000

0001

-

-

-

-

1111

*: state at power on initialization

0 dB gain

1.5 dB gain

in 1.5 dB step

22.5 dB gain

-12.5 dB gain

-13.5 dB gain

in 1 dB step

-27.5 dB gain

Function

Table 8: Control Register CR6 Functions

7654

Earpiece ampifier

[EARA]

0000

0001

-

-

-

-

1111

3210

Extra amplifier [EXTA]

0 dB gain

-2 dB gain

in 2 dB step

-30 dB gain

0 0 0 0 0 dB gain

0 0 0 1 -2 dB gain

-

-

-

- in 2 dB step

1 1 1 1 -30 dB gain

*: state at power on initialization

Table 9: Control Register CR7 Functions

Function

7654

Tone gain

0000

0001

0010

0011

0100

0101

0110

0111

1XX0

1XX1

3210

Function

F1 F2 SN DE

Attenuation

....0 dB *

-3 dB

-6 dB

- 9 dB

-12 dB

-15 dB

-18 dB

-21 dB

-24 dB

-27 dB

f1 Vpp

...1.6(2)

0.066

00

01

10

11

f1 and f2 muted

f2 selected

f1 selected

f1 and f2 in summed mode

0

Squarewave signal selected

1

Sinewave signal selected

0 Normal operation

1 Tone / Ring Generator connected to

Transmit path

*:

state at power on initialization

(2):

value provided if f1 or f2 is selected alone.

if f1 and f2 are selected in the summed mode, f1=0.89 Vpp while f2=0.7 Vpp.

X

reserved: write 0

ST5090

*

*

*

*

f2 Vpp

1.26(2)

0.053

*

*

*

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