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6 page 
Extremely Accurate SPI Bus RTC with Integrated Crystal and SRAM 6 _____________________________________________________________________ Timing Diagram—SPI Read Transfer HIGH IMPEDANCE CS SCLK DIN W/R tDC tCL tCH tCDD tCDZ tCDH tCC tCCS tR tF A6 A0 D0 WRITE ADDRESS BYTE NOTE: SCLK CAN BE EITHER POLARITY, SHOWN FOR CPOL = 1. READ DATA BYTE DOUT D7 Timing Diagram—SPI Write Transfer CS SCLK DIN W/R tDC tCDH tCL tCH tCCH tCWH tF tR tCC A6 A0 WRITE ADDRESS BYTE WRITE DATA BYTE D7 D0 DOUT HIGH IMPEDANCE |
