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CS4235 Fiches technique(PDF) 8 Page - Cirrus Logic |
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CS4235 Fiches technique(HTML) 8 Page - Cirrus Logic |
8 / 94 page TIMING PARAMETERS (Continued) Parameter Symbol Min Max Units Parallel Bus Timing IOW or IOR strobe width tSTW 90 - ns Data valid to IOW rising edge (write cycle) tWDSU 22 - ns IOR falling edge to data valid (read cycle) tRDDV -60 ns SA <> and AEN setup to IOR or IOW falling edge tADSU 22 - ns SA <> and AEN hold from IOW or IOR rising edge tADHD 10 - ns DACK<> inactive to IOW or IOR falling edge (DMA cycle immediately followed by a non-DMA cycle) (Note 8) tSUDK1 60 - ns DACK<> active from IOW or IOR rising edge (non-DMA cycle completion followed by DMA cycle) (Note 8) tSUDK2 0- ns DACK<> setup to IOR falling edge (DMA cycles) DACK<> setup to IOW falling edge (Note 8) tDKSUa tDKSUb 25 25 - - ns ns Data hold from IOW rising edge tDHD2 15 - ns DRQ<> hold from IOW or IOR falling edge DTM(I10) = 0 (assumes no more DMA cycles needed) DTM(I10) = 1 tDRHD - -25 45 - ns Time between rising edge of IOW or IOR to next falling edge of IOW or IOR tBWDN 80 - ns Data hold from IOR rising edge tDHD1 025 ns DACK<> hold from IOW rising edge DACK<> hold from IOR rising edge tDKHDa tDKHDb 25 25 - - ns ns RESDRV pulse width high (Note 1) tRESDRV 1- ms Initialization Time (Note 1, 9) tINIT 310 ms EEPROM Read Time (Note 1, 10) tEEPROM 1190 ms XTAL, 16.9344 MHz, frequency (Notes 1, 11) 16.92 16.95 MHz XTALI high time (Notes 1, 11) 24 - ns XTALI low time (Notes 1, 11) 24 - ns Sample Frequency (Note 1) Fs 3.918 50 kHz CS4610 DSP Serial Port Timing SCLK rising to SDOUT valid (Note 1) tPD1 -60 ns SCLK rising to FSYNC transition (Note 1) tPD2 -20 20 ns SDIN valid to SCLK falling (Note 1) tS1 30 - ns SDIN hold after SCLK falling (Note 1) tH1 30 - ns Notes: 8. AEN must be high during DMA cycles. 9. Initialization time depends on the power supply circuitry, as well as the the type of clock used. 10. EEPROM read time is dependent on amount of data in EEPROM. Minimum time relates to no EEPROM present. Maximum time relates to EEPROM data size of 1k bytes. 11. The Sample frequency specification must not be exceeded. CrystalClear Low Cost ISA Audio System TM CS4235 8 DS252PP2 |
Numéro de pièce similaire - CS4235 |
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Description similaire - CS4235 |
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