SN8F5708 datasheet(129/204 Pages) SONIX

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SN8F5708 Series

ADC

Datasheet Rev. 2.4

129

VREFH Register (0xD5)

Bit

Field

Type

Initial

Description

EVHENB

R/W

ADC internal reference high voltage control bit.

0: Enable ADC internal VREFH function. AVREFH/P5.4 pin

is GPIO.

1: Disable ADC internal VREFH function. AVREFH/P5.4

pin is external AVREFH

*(1) input pin.

EVLENB

R/W

ADC internal reference low voltage control bit.

0: Enable ADC internal VREFL function. AVREFL/P5.5 pin

is GPIO.

1: Disable ADC internal VREFL function. AVREFL/P5.5 pin

is external AVREFL

*(2) input pin.

ADPWS

R/W

PWM trigger ADC start control bit.

0: Disable PWM trigger ADC start.

1: Enable PWM trigger ADC start.

VHS[2]

R/W

ADC internal reference high voltage select bit for AIN14.

0: ADC internal VREFH function is depend on

VHS[1:0]

*(3).

1: ADC internal VREFH function is internal VDD.

1..0

VHS[1:0]

R/W

ADC internal reference high voltage selects bits.

00: 2.0V

01: 3.0V

10: 4.0V

11: VDD

*(1) The AVREFH level must be between the VDD and AVREFL + 2.0V.

*(2) The AVREFL level must be between the VSS and AVREFH - 2.0V.

*(3) If AIN14 channel is selected as internal 2V or 3V or 4V input channel. There is no any input pin from outside. In

this time ADC reference high voltage must be internal VDD or External voltage, not internal 2V/3V/4V.

SN8F5708 Datasheet(PDF) 129 Page - SONiX Technology Company

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