Cirrus-logic AN186 Bedienungsanleitung PDF herunterladen (Seite 9)

AN186

AN186REV1 9

8.2 Timing Diagrams for the Case of Wakeup from Standby State

A. External OSC(13Mhz) with “CLKEN” on “RUN/CLKEN” pin

Note: In Figure 4, the system assumes that the CLKEN pin enables the external oscillator.

B. External OSC (13 MHz) with “RUN” on “RUN/CLKEN” Pin

Note: In Figure 5, the system assumes that the OSC is permanently enabled.

Internal RUN

Instruction fetches

WAKEUP (input)

OSC

Stable clock

CLKEN (output)

(

62-125us

)

(

125-250ms

)

Figure 4. Timing Diagram, External OSC(13 MHz) with “CLKEN” on ‘”RUN/CLKEN” Pin

RUN

(

output

)

Instruction fetches

WAKEUP

(

input

)

OSC

(

62-125us

)

Figure 5. Timing Diagram, External OSC (13 MHz) with “RUN” on “RUN/CLKEN” Pin

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Cirrus-logic AN186 Bedienungsanleitung Seite 9