Electronic Components Datasheet Search
  English  ▼

Delete All


Preview PDF Download HTML

CY28409 Datasheet(PDF) 10 Page - Cypress Semiconductor

Part No. CY28409
Description  Clock Synthesizer with Differential SRC and CPU Outputs
Download  18 Pages
Scroll/Zoom Zoom In 100% Zoom Out
Maker  CYPRESS [Cypress Semiconductor]
Homepage  http://www.cypress.com

CY28409 Datasheet(HTML) 10 Page - Cypress Semiconductor

Zoom Inzoom in Zoom Outzoom out
 10 / 18 page
background image
Document #: 38-07445 Rev. *B
Page 10 of 18
CPU_STP# Assertion
The CPU_STP# signal is an active low input used for
synchronous stopping and starting the CPU output clocks
while the rest of the clock generator continues to function.
When the CPU_STP# pin is asserted, all CPU outputs that are
set with the SMBus configuration to be stoppable via assertion
of CPU_STP# will be stopped after being sampled by two
rising edges of the internal CPUT clock. The final states of the
stopped CPU signals are CPUT = HIGH and CPUC = LOW.
There is no change to the output drive current values during
the stopped state. The CPUT is driven HIGH with a current
value equal to (Mult 0 ‘select’) x (Iref), and the CPUC signal
will not be driven. Due to the external pull-down circuitry,
CPUC will be LOW during this stopped state.
CPU_STP# Deassertion
The de-assertion of the CPU_STP# signal will cause all CPU
outputs that were stopped to resume normal operation in a
synchronous manner. Synchronous manner meaning that no
short or stretched clock pulses will be produce when the clock
resumes. The maximum latency from the deassertion to active
outputs is no more than two CPU clock cycles
Figure 5. CPU_STP# Assertion Waveform
CPU Internal
Figure 6. CPU_STP# Deassertion Waveform

Html Pages

1  2  3  4  5  6  7  8  9  10  11  12  13  14  15  16  17  18 

Datasheet Download

Link URL

Privacy Policy
Does ALLDATASHEET help your business so far?  [ DONATE ]  

About Alldatasheet   |   Advertisement   |   Datasheet Upload   |   Contact us   |   Privacy Policy   |   Alldatasheet API   |   Link Exchange   |   Manufacturer List
All Rights Reserved© Alldatasheet.com

Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn