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CY28159 Datasheet

  • CY28159

  • Clocks and Buffers

  • 147.15KB

  • 13頁(yè)

  • ETC

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1CY28159
CY28159
Clock Generator for Serverworks Grand Champion Chipset Applications
Features
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
Eight differential CPU clock outputs
One PCI output
One 14.31818-MHz reference clock
Two 48-MHz clocks
鈥?All outputs compliant with Intel
specifications
鈥?External resistor for current reference
鈥?Selection logic for differential swing control, test mode,
Hi-Z, power-down and spread spectrum
鈥?48-pin SSOP and TSSOP packages
Table 1. Frequency Selection
SEL 100/133
0
0
0
0
1
1
1
1
S0
0
0
1
1
0
0
1
1
S1
0
1
0
1
0
1
0
1
CPU(0:7), CPU#(0:7)
100 MHz
100 MHz
100 MHz
Hi-Z
133.3MHz
133.3MHz
200MHz
N/A
3V33
33.3MHz
33.3MHz
Disable
Hi-Z
33.3MHz
33.3MHz
33.3MHz
N/A
48M(0,1)
48 MHz
Disable
Disable
Hi-Z
48 MHz
Disable
48 MHz
N/A
Notes
Normal Operation
Test Mode(recommended)
Test Mode (optional)
Hi-Z all outputs
Optional
Optional
o7ptional
Reserved
Block Diagram
Pin Configuration
3V33
VDD
48M0/S0
48M1/S1
VSS
VDD
CPU0
CPU0#
VSS
CPU1
CPU1#
VDD
CPU2
CPU2#
VSS
CPU3
CPU3#
VDD
REF
SSCG#
VSS
XIN
XOUT
VDD
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
SEL100/133
VSS
VDDA
VSSA
PD#
VDD
CPU4
CPU4#
VSS
CPU5
CPU5#
VDD
CPU6
CPU6#
VSS
CPU7
CPU7#
VDD
MULT0
MULT1
VSS
VSSA
IREF
VDDA
XIN
XOUT
MultSel(0:1)
I_Ref
OSC
VDDI
I
Control
REF
CPU (0:7)
CPU (0:7)#
SSCG#
SEL100/133
VCO
48M(0,1)/S(0,1)
PD#
S(0,1)
VDDL
3V33
VSSL
Intel is a registered trademark of Intel Corporation.
Cypress Semiconductor Corporation
Document #: 38-07118 Rev. *A
鈥?/div>
3901 North First Street
鈥?/div>
San Jose
鈥?/div>
CY28159
VSSI
CA 95134 鈥?408-943-2600
Revised December 27, 2002

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