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CS8420-CSZ 数据表(PDF) 9 Page - Cirrus Logic |
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CS8420-CSZ 数据表(HTML) 9 Page - Cirrus Logic |
9 / 94 page DS245F4 9 CS8420 SWITCHING CHARACTERISTICS - SERIAL AUDIO PORTS Inputs: Logic 0 = 0 V, Logic 1 = VD+; CL = 20 pF. 7. The active edges of ISCLK and OSCLK are programmable. 8. When OSCLK, OLRCK, ISCLK, and ILRCK are derived from OMCK they are clocked from its rising edge. When these signals are derived from RMCK, they are clocked from its falling edge. 9. The polarity of ILRCK and OLRCK is programmable. 10. No more than 128 SCLK per frame. 11. This delay is to prevent the previous I/OSCLK edge from being interpreted as the first one after I/OLRCK has changed. 12. This setup time ensures that this I/OSCLK edge is interpreted as the first one after I/OLRCK has changed. Parameter Symbol Min Typ Max Units OSCLK Active Edge to SDOUT Output Valid (Note 7) tdpd - - 25 ns SDIN Setup Time Before ISCLK Active Edge (Note 7) tds 20 - - ns SDIN Hold Time After ISCLK Active Edge (Note 7) tdh 20 - - ns Master Mode O/RMCK to I/OSCLK active edge delay (Note 7, 8) tsmd 0 - 16 ns O/RMCK to I/OLRCK delay (Note 9) tlmd 0 - 17 ns I/OSCLK and I/OLRCK Duty Cycle - 50 - % Slave Mode I/OSCLK Period (Note 10) tsckw 36 - - ns I/OSCLK Input Low Width tsckl 14 - - ns I/OSCLK Input High Width tsckh 14 - - ns I/OSCLK Active Edge to I/OLRCK Edge (Note 7, 9, 11) tlrckd 20 - - ns I/OLRCK Edge Setup Before I/OSCLK Active Edge (Note 7, 9, 12) tlrcks 20 - - ns t ILRCK OLRCK (input) ISCLK OSCLK (input) SDIN SDOUT t lrckd lrcks t sckh tsckw t sckl tdpd dh t ds t t sm d t lm d H ardware M ode Softw are M ode ISC LK OSCLK (output) ILRCK O LRCK (output) RM CK (output) RM CK (output) OM CK (input) Figure 1. Audio Port Master Mode Timing Figure 2. Audio Port Slave Mode and Data Input Timing |
类似零件编号 - CS8420-CSZ |
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类似说明 - CS8420-CSZ |
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