EVAL-AD7147EBZ(Rev0) 데이터 시트보기 (PDF) - Analog Devices

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EVAL-AD7147EBZ
(Rev.:Rev0)

CapTouch™ Programmable Controller for Single-Electrode Capacitance Sensors

Analog Devices 

AD7147

DETAILED REGISTER DESCRIPTIONS

BANK 1 REGISTERS

All addresses and default values are expressed in hexadecimal.

Table 20. PWR_CONTROL Register

Address Data Bit

Default

Value

0x000 [1:0]

0

[3:2]

0

[7:4]

0

[9:8]

0

[10]

0

[11]

0

[12]

0

[13]

0

[15:14]

0

Type

R/W

R/W

R/W

R/W

R/W

R/W

R/W

R/W

Name

POWER_MODE

LP_CONV_DELAY

SEQUENCE_STAGE_NUM

DECIMATION

SW_RESET

INT_POL

EXT_SOURCE

Unused

CDC_BIAS

Description

Operating modes

00 = full power mode (normal operation, CDC

conversions approximately every 36 ms)

01 = full shutdown mode (no CDC conversions)

10 = low power mode (automatic wake-up operation)

11 = full shutdown mode (no CDC conversions)

Low power mode conversion delay

00 = 200 ms

01 = 400 ms

10 = 600 ms

11 = 800 ms

Number of stages in sequence (N + 1)

0000 = 1 conversion stage in sequence

0001 = 2 conversion stages in sequence

……

Maximum value = 1011 = 12 conversion stages per

sequence

ADC decimation factor

00 = decimate by 256

01 = decimate by 128

10 = decimate by 64

11 = decimate by 64

Software reset control (self-clearing)

1 = resets all registers to default values

Interrupt polarity control

0 = active low

1 = active high

Excitation source control

0 = enable excitation source to CINx pins

1 = disable excitation source to CINx pins

Set to 0

CDC bias current control

00 = normal operation

01 = normal operation + 20%

10 = normal operation + 35%

11 = normal operation + 50%

Rev. 0 | Page 41 of 68

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