Cirrus-logic CS61584A Manual do Utilizador descarregar pdf (Página 10)

CS61584A

10 DS261PP5

DS261PP5

SWITCHING CHARACTERISTICS - SERIAL PORT (T

= -40 to 85 °C; DV+, TV+, RV+ =

nominal ± 0.3 V; Inputs: Logic 0 = 0 V, Logic 1 = RV+)

Notes: 28. If SPOL = 0, then CS

should return high no sooner than 20 ns after the 16

rising edge of SCLK during

a serial port read.

29. Output load capacitance = 50 pF.

Parameter Symbol Min Typ Max Unit

SDI to SCLK Setup Time t

25 - - ns

SCLK to SDI Hold Time t

cdh

25 - - ns

SCLK Low Time t

50 - - ns

SCLK High Time t

50 - - ns

SCLK Rise and Fall Time t

, t

- - 15 ns

to SCLK Setup Time t

20 - - ns

SCLK to CS

Hold Time (Note 28) t

cch

20 - - ns

Inactive Time t

cwh

100 - - ns

SDO Valid to SCLK (Note 29) t

cdv

- - 50 ns

to SDO High Z t

cdz

-50-ns

LSB LSB MSB

CONTROL BYTE DATA BYTE

SCLK

SDI

cwh

cch

cdh

Figure 4. Serial Port Write Timing Diagram

HIGH

SCLK

SDO

SPOL = 0

cdz

cdv

Figure 5. Serial Port Read Timing Diagram

CS61584A

10 DS261F1

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 ... 53 54

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