ST5080D datasheet(17/32 Pages) STMICROELECTRONICS

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Table 9: Control Register CR7 Functions

76543

Function

Tone gain

Attenuation

f1 Vpp

f2 Vpp

....0dB *

-3 dB

-6 dB

-9 dB

-12 dB

-15 dB

-18 dB

-21 dB

-24 dB

-27 dB

...2.4 (1)

1.70

1.20

0.85

0.60

0.43

0.30

0.21

0.15

0.10

....1.9 (1)

1.34

0.95

0.67

0.47

0.34

0.24

0.17

0.12

0.08

f1 and f2 muted

f2 selected

f1 selected

f1 and f2 in summed mode

Squarewave signal selected

Sinewave signal selected

Normal operation

Tone / Ring Generator connected to

Transmit path

state at power on initialization

(1):

value provided if f1 or f2 is selected alone.

if f1 and f2 are selected in the summed mode, f1=1.34 Vpp while f2=1.06 Vpp.

Output generator is 2.4 Vpp

reserved: write 0

Table 10: Control Register CR8 Functions

76543

Function

f17

f16

f15

f14

f13

f12

f11

f10

msb

lsb

Binary equivalent of the decimal number used to calculate f1

Table 11: Control Register CR9 Functions

76543

Function

f27

f26

f25

f24

f23

f22

f21

f20

msb

lsb

Binary equivalent of the decimal number used to calculate f2

ST5080A

17/32

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