CY28RS480-1 Cypress Semiconductor, CY28RS480-1 Datasheet - Page 2

• Manufacturer Part Number: CY28RS480-1
• Description: Clock Generator
• Manufacturer: Cypress Semiconductor

Document #: 38-07714 Rev. *C
Pin Description
27, 28, 30, 29
15, 20, 26, 36
41,40,45,44
12, 13, 16,
17, 18, 19,
22, 23, 24,
52, 53, 54
25, 34, 33
14, 21, 35
Pin No.
10,11
50
37
47
43
51
56
48
32
39
42
49
55
31
46
38
7
8
4
3
5
1
2
6
9
CLKREQ#[0:1]
SRCST/C[1:0]
SRCT/C[5:0]
VDD_SRCS
VSS_SRCS
CLK_STOP
VDD_CPU
VDD_SRC
VDD_REF
VDD_HTT
VSS_CPU
VSS_SRC
VSS_REF
VSS_HTT
VDD_PCI
VSS_PCI
REF[2:0]
VDD_48
CPUT/C
USB_48
VSS_48
SDATA
HTT66
XOUT
VDDA
VSSA
SCLK
Name
PCI0
IREF
XIN
NC
O, DIF Differential CPU clock outputs. AMD
I/O,PU SMBus-compatible SDATA.This pin has an internal pull-up, but is tri-stated in
O, DIF Differentials Selectable serial reference clock. Intel Type-X buffer.
O, DIF 100-MHz differential serial reference clock. Intel Type-X buffer.
O, SE 14.318-MHz REF clock output. Intel
O, SE 48-MHz clock output. Intel Type-3A buffer.
O, SE 66-MHz clock output. Intel Type-5 buffer.
I, SE,
PWR 3.3V power supply for USB outputs
PWR 3.3V power supply for CPU outputs
PWR 3.3V power supply for PCI outputs
PWR 3.3V power supply for REF outputs
PWR 3.3V power supply for Hyper Transport outputs
PWR 3.3V power supply for SRC outputs
PWR 3.3V power supply for SRCS outputs
PWR 3.3V Analog Power for PLLs
GND
GND
GND
GND
GND
GND
GND
GND
Type
I,PU
I,PU
PD
O
O
I
I
33-MHz clock output.
A precision resistor attached to this pin is connected to the internal current
reference.
SMBus-compatible SCLOCK.This pin has an internal pull-up, but is tri-stated in
power-down.
power-down.
Includes overclock support through SMBUS
Output Enable control for SRCT/C. Output enable control required by Minicard
specification. This pin has an internal pull down. 0 = selected SRC output is
enabled.1 = selected SRC output is disabled.
Ground for USB outputs
Ground for CPU outputs
Ground for PCI outputs
Ground for REF outputs
Ground for SRC outputs
Ground for SRCS outputs
Ground for HyperTransport outputs
Analog Ground
14.318-MHz Crystal Input
14.318-MHz Crystal Output
3.3V LVTTL Input
When this pin is asserted HIGH, all clock outputs except for CPUCLKs (pins 41,
40, 45, 44) are halted at logic level 0. This pin has internal pull-up
No Connects
PRELIMINARY
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Description


Type-5 buffer.
K8 buffer (200 MHz).
CY28RS480-1
Page 2 of 16
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