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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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MCP2035-I/ST 데이터시트(PDF) 45 Page - Microchip Technology |
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MCP2035-I/ST 데이터시트(HTML) 45 Page - Microchip Technology |
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45 / 68 page  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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