CS4922-CL Просмотр технического описания (PDF) - Cirrus Logic

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CS4922-CL

MPEG/G.729A Audio Decoder System

Cirrus Logic 

CS4922

SWITCHING CHARACTERISTICS - CLOCKS (TA = 25 °C; VA+, VD+ = 5V; Inputs: Logic 0 =

DGND, Logic 1 = VD+, CL = 20pF)

Parameter

Symbol Min Typ Max Units

Master Clock Frequency

CLKIN

27

MHz

Master Clock Duty Cycle

CYCK 40

50

60

%

Clock Output

CLKOUT -

- 256 Fs MHz

SWITCHING CHARACTERISTICS - EXTERNAL FLAGS (TA = 25 °C; VA+, VD+ = 5V;

Inputs: Logic 0 = DGND, Logic 1 = VD+, CL = 20pF)

Parameter

Symbol Min Typ Max Units

Rise time of XF1-XF4

Fall time of XF1-XF4

(Note 3) trxf

tfxf

200

ns

100

ns

Notes: 3. Assumes 2kΩ pull-up to 5V supply on XF1-XF4 pins.

SWITCHING CHARACTERISTICS - PROGRAMMABLE INPUT/OUTPUT (TA = 25 °C;

VA+, VD+ = 5V; Inputs: Logic 0 = DGND, Logic 1 = VD+, CL = 20pF)

I_O = 0

Input Frequency

Risetime of PIO

Fall time of PIO

I_O = 1

Parameter

Symbol Min Typ Max Units

fpio

350 kHz

trpio

200

ns

tfpio

200

ns

Rise time of PIO

Fall time of PIO

trpo

200

ns

tfpo

200

ns

6

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