BLUENRG-2 datasheet(36/190 Pages) STMICROELECTRONICS

36 / 190 page

Functional details

BlueNRG-2

36/190

DocID030675 Rev 2

Bit

Field name

Reset

Description

SWSTART

0x0

Starts the ADC conversion phase when set.

RESET

0x0

Reset all the ADC registers when set.

STOP

0x0

Permits to stop the continuous conversion.

0: continuous conversion is enabled but SWSTART and

ADCON bits must be set.

1: stop the continuous conversion and switch off the ADC.

ENAB_COMP

0x0

Enables the window comparator when set to 1. WDOG

flag is ADC_SR register is set if the converted value is

between THRESHOLD_HI and THRESHOLD_LO value.

RSTCALEN

0x0

Disable the calibration phase when set to 1. This bit has to

be set to disable the calibration each time calibration is

enabled.

AUTO_OFFSET

0x0

Enables the update of OFFSET register.

0: OFFSET register is not updated.

1: OFFSET register is updated.

MIC_ON

0x0

Enables the filter chain for voice when set to 1.

0: Filter chain is disabled.

1: Filter chain is enabled.

DMA_EN

0x0

Enables the DMA.

0: DMA is disabled.

1: DMA is enabled.

31:10

RESERVED

0x0

RESERVED

Table 33: ADC - CONF register description: address offset ADC_BASE_ADDR+0x04

Bit

Field name

Reset

Description

EN_DFMODE

0x1

Control the current in differential mode:

0: Differential mode with DC common mode current not

nulled.

1: Differential mode with DC common mode current

nulled.

3:1

CHSEL

0x7

Select the input channel:

000b: All switches open.

001b: Single ended through ADC2 pin. InP = Vbias

(internal), InN = ADC2 pin.

010b: Single ended through ADC1 pin. InP = ADC1 pin,

InN = Vbias (internal).

011b: Differential ADC1 pin - ADC2 pin, InP = ADC1 pin,

InN = ADC2 pin.

100b: Temperature sensor. InP = 0.6 V (internal), InN =

TEMP.

101b: Battery level detector. InP = 0.6 V (internal), InN =

BLD.

110b: Short InN = InP = 0.6 V (internal).

5:4

REFSEL

0x3

Set the Vbias for single ended conversion:

10b: 0.6 V

11b: 1.2 V

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