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MCP2035-I/ST Datasheet(PDF) 45 Page - Microchip Technology

Part # MCP2035-I/ST
Description  Analog Front-End Device for BodyCom Applications
PDF  68 Pages
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

MCP2035-I/ST Datasheet(HTML) 45 Page - Microchip Technology

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 2012 Microchip Technology Inc.
DS22304A-page 45
MCP2035
FIGURE 5-9:
Power-Up Sequence.
FIGURE 5-10:
SPI Write Sequence.
CS
SCLK/ALERT
LFDATA/CCLK/SDIO
ALERT
LFDATA
(output)
(open collector
output)
CS
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
1
2
3
4
5
6
7
MCU SPI Write Details:
1.
Drive the open collector ALERT output low
•
To ensure no false clocks occur when CS drops
2.
Drop CS
•
SCLK/ALERT becomes SCLK input
•
LFDATA/CCLK/SDIO becomes SDI input
3.
Change LFDATA/CCLK/SDIO connected pin to output
•
Driving SPI data
4.
Clock in 16-bit SPI Write sequence – command, address, data and parity bit
•
Command, address, data and parity bit
5.
Change LFDATA/CCLK/SDIO connected pin to input
6.
Raise CS to complete the SPI Write
7.
Change SCLK/ALERT back to input
LSb
MSb



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