MCP3564 datasheet(86/108 Pages) MICROCHIP

86 / 108 page

MCP3561/2/4

DS20006181C-page 86

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8.5

CONFIG3 Register

Name

Bits

Address

Cof

CONFIG3

0x4

R/W

CONFIG3: CONFIGURATION REGISTER 3

R/W-0

CONV_MODE[1:0]

DATA_FORMAT[1:0]

CRC_FORMAT

EN_CRCCOM

EN_OFFCAL

EN_GAINCAL

bit 7

bit 0

Legend:

R = Readable bit

W = Writable bit

U = Unimplemented bit, read as ‘0’

-n = Value at POR

‘1’ = Bit is set

‘0’ = Bit is cleared

x = Bit is unknown

bit 7-6

CONV_MODE[1:0]: Conversion Mode Selection

11 = Continuous Conversion mode or continuous conversion cycle in SCAN mode

10 = One-shot conversion or one-shot cycle in SCAN mode. It sets ADC_MODE[1:0] to ‘10’ (standby) at

the end of the conversion or at the end of the conversion cycle in SCAN mode.

0x = One-shot conversion or one-shot cycle in SCAN mode. It sets ADC_MODE[1:0] to ‘0x’ (ADC

Shutdown) at the end of the conversion or at the end of the conversion cycle in SCAN mode (default).

bit 5-4

DATA_FORMAT[1:0]: ADC Output Data Format Selection

11 = 32-bit (25-bit right justified data + Channel ID): CHID[3:0] + SGN extension (4 bits) + 24-bit ADC

data. It allows overrange with the SGN extension.

10 = 32-bit (25-bit right justified data): SGN extension (8-bit) + 24-bit ADC data. It allows overrange with

the SGN extension.

01 = 32-bit (24-bit left justified data): 24-bit ADC data + 0x00 (8-bit). It does not allow overrange (ADC

code locked to 0xFFFFFF or 0x800000).

00 = 24-bit (default ADC coding): 24-bit ADC data. It does not allow overrange (ADC code locked to

0xFFFFFF or 0x800000).

bit 3

CRC_FORMAT: CRC Checksum Format Selection on Read Communications

(it does not affect CRCCFG coding)

1 = 32-bit wide (CRC-16 followed by 16 zeros)

0 = 16-bit wide (CRC-16 only) (default)

bit 2

EN_CRCCOM: CRC Checksum Selection on Read Communications

(it does not affect CRCCFG calculations)

1 = CRC on communications enabled

0 = CRC on communications disabled (default)

bit 1

EN_OFFCAL: Enable Digital Offset Calibration

1 = Enabled

0 = Disabled (default)

bit 0

EN_GAINCAL: Enable Digital Gain Calibration

1 = Enabled

0 = Disabled (default)

MCP3564 数据表(PDF) 86 Page - Microchip Technology

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