MCP3564-ESLASHST datasheet(81/108 Pages) MICROCHIP

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DS20006181C-page 81

MCP3561/2/4

8.0

INTERNAL REGISTERS

The MCP3561/2/4 devices have a total of 16 internal

registers made of volatile memory. Table 8-1 includes a

summary of the registers. These registers are

sequentially accessible.

TABLE 8-1:

INTERNAL REGISTERS SUMMARY

Address Register Name

No. of

Bits

R/W

Description

0x0

ADCDATA

4/24/32

Latest A/D conversion data output value (24 or 32 bits depending on

DATA_FORMAT[1:0]) or modulator output stream (4-bit wide) in MDAT

Output mode

0x1

CONFIG0

R/W ADC Operating mode, Master Clock mode and Input Bias Current

Source mode

0x2

CONFIG1

R/W Prescale and OSR settings

0x3

CONFIG2

R/W ADC boost and gain settings, auto-zeroing settings for analog

multiplexer, voltage reference and ADC

0x4

CONFIG3

R/W Conversion mode, data and CRC format settings; enable for CRC on

communications, enable for digital offset and gain error calibrations

0x5

IRQ

R/W IRQ Status bits and IRQ mode settings; enable for Fast commands and

for conversion start pulse

0x6

MUX

R/W Analog multiplexer input selection (MUX mode only)

0x7

SCAN

R/W SCAN mode settings

0x8

TIMER

R/W Delay value for TIMER between scan cycles

0x9

OFFSETCAL

R/W ADC digital offset calibration value

0xA

GAINCAL

R/W ADC digital gain calibration value

0xB

RESERVED

R/W

0xC

RESERVED

R/W

0xD

LOCK

R/W Password value for SPI Write mode locking

0xE

RESERVED

R/W

0xF

CRCCFG

CRC checksum for device configuration

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