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CY28158
Document #: 38-07039 Rev. *B
Page 8 of 10
Switching Waveforms (continued)
PCI_STOP#
CPU
(Internal)
PCI
(Internal)
PCI_F
PCI_STOP#
PCI
(External)
(Free-Running)
PWR_DWN#
CPU
(Internal)
PCI
(Internal)
PWR_DWN#
PCI
CPU
(External)
(External)
VCO
Crystal
Shaded section on the VCO and Crystal waveforms indicates that the VCO and crystal oscillator are active, and there is a valid clock.
Test Circuit
Note: All capacitors must be placed as close to the pins as is physically possible.
1, 7, 8, 13, 19, 20, 21, 24, 29, 40, 44, 48, 52
4, 10, 16, 17, 22, 23, 27, 31, 39
VDD_PCI, VDD_3V66,
CLOAD
OUTPUTS
VDD_CPU,
CY28158
43, 47, 51, 56
Note: Each supply pin must have an individual decoupling capacitor on test circuit at 0.1
µF.
VDD_48MHZ, VDD_REF,
VDD_IOAPIC
VDDA
Ordering Information
Ordering Code
Package Name
Package Type
Operating Range
CY28158PVC
O56
56-Pin SSOP
Commercial
CY28158PVCT
O56
56-Pin SSOP- Tape and Reel
Commercial
Lead Free
CY28158OXC
O56
56-Pin SSOP
Commercial
CY28158OXCT
O56
56-Pin SSOP- Tape and Reel
Commercial
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