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CS5507 데이터시트(PDF) 9 Page - Cirrus Logic |
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CS5507 데이터시트(HTML) 9 Page - Cirrus Logic |
9 / 40 page 5V SWITCHING CHARACTERISTICS (TA = TMIN to TMAX; VA+, VD+ = 5V ± 10%; VA- = -5V ± 10%; Input Levels: Logic 0 = 0V, Logic 1 = VD+; CL = 50 pF.) (Note 2) Parameter Symbol Min Typ Max Units SSC Mode (M/SLP = VD+) Access Time: CS Low to SDATA out (DRDY = low) DRDY falling to MSB (CS = low) tcsd1 tdfd - - - 2/fclk 2/fclk 3/fclk ns ns SDATA Delay Time: SCLK falling to next SDATA bit tdd1 - 80 250 ns SCLK Delay Time SDATA MSB bit to SCLK rising tcd1 -1/fclk -ns Serial Clock (Out) Pulse Width High Pulse Width Low tph1 tpl1 - - 1/fclk 1/fclk - - ns ns Output Float Delay: CS high to output Hi-Z (Note 16) SCLK rising to SDATA Hi-Z tfd1 tfd2 - - - 1/fclk 2/fclk - ns ns SEC Mode (M/SLP = DGND) Serial Clock (In) fsclk 0- 2.5 MHz Serial Clock (In) Pulse Width High Pulse Width Low tph2 tpl2 200 200 - - - - ns ns Access Time: CS Low to data valid (Note 17) tcsd2 - 60 200 ns Maximum Delay time: (Note 18) SCLK falling to new SDATA bit tdd2 - 150 310 ns Output Float Delay: CS high to output Hi-Z (Note 16) SCLK falling to SDATA Hi-Z tfd3 tfd4 - - 60 160 150 300 ns ns Notes: 16. If CS is returned high before all data bits are output, the SDATA and SCLK outputs will complete the current data bit and then go to high impedance. 17. If CS is activated asynchronously to DRDY, CS will not be recognized if it occ urs when DRDY is high for 2 clock cycles. The propagation delay time may be as great as 2 fclk cycles plus 200 ns. To guarantee proper clocking of SDATA when using asynchronous CS, SCLK(i) should not be taken high sooner than 2 fclk + 200 ns after CS goes low. 18. SDATA transitions on the falling edge of SCLK. Note that a rising SCLK must occur to enable the serial port shifting mechanism before falling edges can be recognized. CS5505/6/7/8 DS59F7 9 CS5505/6/7/8 DS59F7 9 |
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