Interfacing the M68HC05 MCU to the MC145051 A/D Converter

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Freescale Semiconductor, Inc.Application NoteAppendix B — MC68HC705C8/MC145051 FlowchartSTART"INITIALIZE PORTS"PORT A = PORT B = PORT C = $FFDATA DIR A = DATA DIR B = DATA DIR C = $FFnc...Freescale Semiconductor, I"INITIALIZE THE A/D CHANNEL #"CHANNEL = $00"INITIALIZE SPI MODULE"TURN ON MASTER MODECPHA = CPOL = 0"BEGIN A/D ACQUISITION"CS = 0"1ST 8-BIT SERIAL TRANSFER"LOAD ACCA UPPER NIBBLEWITH CHANNEL #STORE ACCA TO SPI DATA REGISTERTO START TRANSMISSIONIS SERIALTRANSFER DONE?NOYESAAN1228 — Rev. 2.020 MOTOROLAFor More Information On This Product,Go to: www.freescale.com
Freescale Semiconductor, Inc.Application NoteAppendix B — MC68HC705C8/MC145051 FlowchartAREAD SPI DATA REGISTERSTORE TO RESULTSTORE TO PORT Bnc...Freescale Semiconductor, I"2ND 8-BIT SERIAL TRANSFER"LOAD ACCAWITH CHANNEL #STORE ACCA TO SPI DATA REGISTERTO START TRANSMISSIONIS SERIALTRANSFER DONE?READ SPI DATA REGISTERSTORE TO RESULT + 1STORE TO PORT C"END A/D ACQUISITION"CS = 1ENDYESNOAN1228 — Rev. 2.0MOTOROLA 21For More Information On This Product,Go to: www.freescale.com
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Interfacing the M68HC05 MCU to the MC145051 A/D Converter

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