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WM8998 Datasheet(PDF) 31 Page - Wolfson Microelectronics plc |
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WM8998 Datasheet(HTML) 31 Page - Wolfson Microelectronics plc |
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31 / 307 page  Production Data WM8998 w PD, October 2014, Rev 4.0 31 DIGITAL SPEAKER (PDM) INTERFACE TIMING SPKCLK (output) SPKDAT (output) tCY tLH tRH tLSU tRSU (left data) (right data) VOH VOL VOL tr tf VOH Figure 3 Digital Speaker (PDM) Interface Timing - Mode A Test Conditions The following timing information is valid across the full range of recommended operating conditions. PARAMETER SYMBOL MIN TYP MAX UNIT PDM Audio Interface Timing SPKCLKn cycle time tCY 160 163 358 ns SPKCLKn duty cycle 45 55 % SPKCLKn rise/fall time (25pF load) tr, tf 5 30 ns SPKDATn set-up time to SPKCLKn rising edge (Left channel) tLSU 30 ns SPKDATn hold time from SPKCLKn rising edge (Left channel) tLH 30 ns SPKDATn set-up time to SPKCLKn falling edge (Right channel) tRSU 30 ns SPKDATn hold time from SPKCLKn falling edge (Right channel) tRH 30 ns (right data) (left data) VOL tf SPKCLK (output) SPKDAT (output) tLDIS tRDIS tLEN tCY tREN VOL tr VOH VOH Figure 4 Digital Speaker (PDM) Interface Timing - Mode B Test Conditions The following timing information is valid across the full range of recommended operating conditions. PARAMETER SYMBOL MIN TYP MAX UNIT PDM Audio Interface Timing SPKCLKn cycle time tCY 160 163 358 ns SPKCLKn duty cycle 45 55 % SPKCLKn rise/fall time (25pF load) tr, tf 5 30 ns SPKDATn enable from SPKCLK rising edge (Right channel) tREN 15 ns SPKDATn disable to SPKCLK falling edge (Right channel) tRDIS 5 ns SPKDATn enable from SPKCLK falling edge (Left channel) tLEN 15 ns SPKDATn disable to SPKCLK rising edge (Left channel) tLDIS 5 ns |
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