Cirrus-logic CS5345 Manuale Utente Scaricare il pdf (Pagina 21)

DS658F4 21

CS5345

SWITCHING CHARACTERISTICS - CONTROL PORT - SPI FORMAT

Inputs: Logic 0 = DGND = AGND = 0 V, Logic 1 = VLC, C

=30pF.

21. Data must be held for sufficient time to bridge the transition time of CCLK.

22. For f

sck

<1 MHz.

Parameter Symbol Min Max Units

CCLK Clock Frequency f

sck

-6.0MHz

RESET

Rising Edge to CS Falling t

srs

500 - ns

CS High Time Between Transmissions t

csh

1.0 - s

CS Falling to CCLK Edge t

css

20 - ns

CCLK Low Time t

scl

66 - ns

CCLK High Time t

sch

66 - ns

CDIN to CCLK Rising Setup Time t

dsu

40 - ns

CCLK Rising to DATA Hold Time (Note 21) t

15 - ns

CCLK Falling to CDOUT Stable t

-50ns

Rise Time of CDOUT t

-25ns

Fall Time of CDOUT t

-25ns

Rise Time of CCLK and CDIN (Note 22) t

- 100 ns

Fall Time of CCLK and CDIN (Note 22) t

- 100 ns

dsu

sch

scl

CCLK

CDIN

css

CDOUT

csh

RST

srs

Figure 6. Control Port Timing - SPI Format

1 2 ... 16 17 18 19 20 21 22 23 24 25 26 ... 41 42

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Cirrus-logic CS5345 Manuale Utente Pagina 21

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