MCP3918 datasheet(71/88 Pages) MICROCHIP

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 2014 Microchip Technology Inc.

DS20005287A-page 71

MCP3918

9.5

STATUSCOM Register - Status and

Communication Register

Name

Bits

Address

Cof.

STATUSCOM

0x0C

R/W

STATUSCOM REGISTER

R/W-1

R/W-0

R/W-1

R/W-0

U-0

R/W-0

R/W-1

READ<1>

READ<0>

WRITE

DR_HIZ

—

WIDTH_ CRC

WIDTH_ DATA<1> WIDTH_ DATA<0>

bit 23

bit 16

R/W-0

U-0

EN_CRCCOM

EN_INT

Reserved

EN_MDAT

—

bit 15

bit 8

U-0

R-1

—

DRSTATUS<0>

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 23-22

READ<1:0>:

Address counter increment setting for Read Communication

Address counter auto-increments, loops on the entire register map

Address counter auto-increments, loops on register TYPES (DEFAULT)

Address counter auto-increments, loops on register GROUPS

Address not incremented, continually reads the same single-register address

bit 21

WRITE:

Address counter increment setting for Write Communication

Address counter loops on writable part of the register map (Default)

Address not incremented, continually writes to the same single-register address

bit 20

DR_HIZ:

Data Ready Pin Inactive State Control

=The DR pin state is a logic high when data is NOT ready

=The DR pin state is high-impedance when data is NOT ready (Default)

bit 19

Unimplemented:

Read as ‘0’

bit 18

WIDTH_CRC

Format for CRC-16 on communications

32-bit (CRC-16 code is followed by sixteen zeros). This coding is compatible with CRC

implementation in most 32-bit MCUs (including PIC32 MCUs).

16-bit (default)

bit 17-16

WIDTH_DATA<1:0>:

ADC Data Format Settings for the ADC (see Section 5.5 “ADC Output Coding”)

32-bit with sign extension

32-bit with zeros padding

24-bit (default)

16-bit (with rounding)

bit 15

EN_CRCCOM:

Enable CRC CRC-16 Checksum on Serial communications

CRC-16 Checksum is provided at the end of each communication sequence (therefore each

communication is longer). The CRC-16 Message is the complete communication sequence

(see section Section 6.9 “Securing Read Communications through CRC-16 Checksum”

for more details).

=Disabled (Default)

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