Cypress Semiconductor CY25822-2 Scheda tecnica - Pagina 5
Sfoglia online o scarica il pdf Scheda tecnica per Hardware del computer Cypress Semiconductor CY25822-2. Cypress Semiconductor CY25822-2 9. Cypress spread spectrum clock generator specification sheet
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PWRDWN#
CLKOUT
REFOUT
Figure 1. Power-down Assertion
P D #
<3.0m s
C LK O U T
R E FO U T
Figure 2. Power-down Deassertion
CLKOUT and REFOUT Enable Clarification
2
The CLKOUT enable and REFOUT enable I
C register bits are
used to shot-off the CLKOUT and REFOUT clocks individually.
The VCO and crystal oscillator must remain on. A shutdown
clock is driven low. ALL clocks need to be stopped in a
predictable manner. All clocks need to be shutdown without
any glitches or other abnormal behavior while transitioning to
a stopped state. Similarly when CLKOUT or REFOUT is
enabled the clock must start in a predictable manner without
any glitches or abnormal behavior.
Document #: 38-07531 Rev. **
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