CY2273A Cypress Semiconductor, CY2273A Datasheet - Page 11

• Manufacturer Part Number: CY2273A
• Description: K6 Clock Synthesizer/Driver
• Manufacturer: Cypress Semiconductor

Switching Waveforms
(Free-Running)
(Free-Running)
CPU_STOP
PWR_DWN
CPU_STOP
PCI_STOP
PWR_DOWN
Timing Requirements for the I
Notes:
PCI_STOP
11. CPUCLK on and CPUCLK off latency is 2 or 3 CPUCLK cycles.
12. CPU_STOP may be applied asynchronously. It is synchronized internally.
13. PCICLK on and PCICLK off latency is 1 rising edge of the external PCICLK.
14. PCI_STOP may be applied asynchronously. It is synchronized internally.
(External)
(External)
CPUCLK
CPUCLK
(Internal)
PCICLK
(Internal)
(External)
PCICLK
PCICLK
PCICLK
SDA
CPUCLK
CPUCLK
(External)
SCL
(Internal)
(Internal)
CPUCLK
(Internal)
PCICLK
(Internal)
Crystal
PCICLK
PCICLK
VCO
Shaded section on the VCO and Crystal waveforms indicates that the VCO and crystal oscillator are active, and there is a valid clock.
[13, 14]
[11, 12]
t
13
t
14
(continued)
2
C Bus
t
15
t
20
t
18
t
t
21
16
11
t
19
t
17
t
14
CY2273A
t
22