MCP2030 datasheet(47/66 Pages) MICROCHIP

Part #	MCP2030

Description	Three-Channel Analog Front-End Device

PDF	66 Pages

Scroll/Zoom	100%

Manufacturer	MICROCHIP [Microchip Technology]

Direct Link	http://www.microchip.com

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47 / 66 page

DS21981A-page 47

MCP2030

FIGURE 5-10:

SPI Write Sequence.

SCLK/ALERT

LFDATA/CCLK/SDIO

TSU

THD

TCSSC

TSCCS

THI

TLO

1/FSCLK

TCS1

TCSH

TCS0

ALERT

LFDATA

SDI

(output)

(input)

(output)

SCLK

(input)

ALERT

(output)

LFDATA

(output)

16 Clocks for Write Command, Address and Data

MCU SPI Write Details:

Drive the open collector ALERT output low.

•

to ensure no false clocks occur when CS drops

Drop CS.

•

SCLK/ALERT becomes SCLK input

•

LFDATA/CCLK/SDIO becomes SDI input

Change LFDATA/CCLK/SDIO connected pin to output.

•

driving SPI data

Clock in 16-bit SPI Write sequence – command, address, data and parity bit.

•

command, address, data and parity bit

Change LFDATA/CCLK/SDIO connected pin to input.

Raise CS to complete the SPI Write.

Change SCLK/ALERT back to input.

LSb

MSb

MCP2030 Datasheet(PDF) 47 Page - Microchip Technology

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