CMI8787 Datasheet, PDF (25/28 Pages) C-Media Electronics – High Performance PCI Audio Processor

C-Media High Performance PCI Audi o Processor
Oxygen^TM HD CMI8787 Datasheet v0.5
BIT_CLK to SYNC Timing Parameters
Parameter
XAC97_BCLK frequency
XAC97_BCLK period
Symbol
Min
Typ
12.288
-
Tclk_period 81.4
-
XAC97_BCLK output jitter
XAC97_BCLK high pulsewidth (note 1)
750
-
Tclk_high
40.7
-
XAC97_BCLK low pulse width (note 1)
XAC97_SYNC frequency
XAC97_SYNC period
XAC97_SYNC high pulse width
Tclk_low
40.7
-
48.0
-
Tsync_period 20.8
-
Tsync_high
1.3
-
XAC97_SYNC low_pulse width
Tsync_low
19.5
-
Note: Worst case duty cycle restricted to 45/55.
Max Units
-
MHz
-
ns
-
ps
-
ns
-
ns
-
kHz
-
us
-
us
-
us
4. DATA SETUP AND HOLD
Data Setup and Hold diagram
Data Setup and Hold Parameters
Parameter
Setup to falling edge of XAC97_BCLK
Hold from falling edge of XAC97_BCLK
Symbol
Tsetup
Thold
Min
Typ
Max Units
30
-
-
ns
30
-
-
ns
Note: Setup and hold time parameters for SDATA_IN are with respect to the AC ‘97 Controller.
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C-MEDIA CONFIDENTIAL