STW5094 datasheet(14/37 Pages) STMICROELECTRONICS

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STw5094

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Control Register CR12 Functions (Address: 0x0C)

*: state at power on initialization

X: reserved write 0

Control Register CR13 Functions (Address: 0x0D)

Control Register CR14 Functions (Address: 0x0E)

Control Register CR15 Functions (Address: 0x0F)

* state at power on initialization

7654

3210

Function

TONEG(3:0)

FSEL(1:0)

Tone gain is 0 dB

Tone gain is -3 dB

Tone gain in 3 dB step

Tone gain is -33 dB

f1 and f2 muted

f1 selected

f2 selected

f1 and f2 in summed mode

Squarewave signal selected

Sinewave signal selected

Tone

⁄ Ring Generator not connected to Transmit path

Tone

⁄ Ring Generator connected to Transmit path

765432

Function

F1(7:0)

msb

lsb

Binary equivalent of the decimal number used to calculate f1

See Table 1

765432

Function

F2(7:0)

msb

lsb

Binary equivalent of the decimal number used to calculate f2

See Table 1

765432

Function

BZ(5:0)

Buzzer output disabled (set to 0)

Buzzer output enabled

Duty Cycle is intended as the relative width of logic 1

Duty cycle is intended as the relative width of logic 0

msb

lsb

Binary equivalent of the decimal number used to calculate the

duty cycle, using the formula:

DutyCycle = BZ(5:0) x 0.78125 %

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