CY28408 Datasheet, PDF (1/19 Pages) Cypress Semiconductor – Clock Synthesizer with Differential CPU Outputs

CY28408
Clock Synthesizer with Differential CPU Outputs
Features
• Compatible to Intel^® CK 408 Mobile Clock Synthesizer
• Support Intel P4 and Brookdale CPU
• Specifications
• 3.3V power supply
• Three differential CPU clocks
• Ten copies of PCI clocks
Table 1. Frequency Table^[1]
S2
S1
S0
CPU(0:2)
1
0
0
100 MHz
1
0
1
133 MHz
1
1
0
1
1
1
166 MHz
0
0
0
66 MHz
0
0
1
100 MHz
0
1
0
0
1
1
133 MHz
M
0
0
Hi-Z
M
0
1
TCLK/2
Block Diagram
• Six copies of 3V66 clocks
• SMBus support with read back capabilities
• Spread Spectrum electromagnetic interference (EMI)
reduction
• Dial-A-Frequency^® features
• Dial-A-dB features
• 56-pin TSSOP package
3V66
66 MHz
66 MHz
66 MHz
66 MHz
66 MHz
66 MHz
Hi-Z
TCLK/4
PCI_PCIF
33 MHz
33 MHz
Reserved
33 MHz
33 MHz
33 MHz
Reserved
33 MHz
Hi-Z
TCLK/8
REF
14.318 MHz
14.318 MHz
14.318 MHz
14.318 MHz
14.318 MHz
14.318 MHz
Hi-Z
TCLK
USB/DOT
48 MHz
48 MHz
48 MHz
48 MHz
48 MHz
48 MHz
Hi-Z
TCLK/2
Pin Configuration
XIN
XOUT
CPU_STP#
IREF
VSSIREF
S(0:2)
MULT0
VTT_PWRGD#
PCI_STP#
PLL1
PLL2
PD#
SDATA
SCLK
VDDA
WD
Logic
I2C
Logic
Power
Up Logic
REF
VDD 1
XIN 2
XOUT 3
CPUT(0:2)
CPUC(0:2)
VSS 4
PCIF0 5
PCIF1 6
PCIF2 7
VDD 8
VSS 9
3V66_0
PCI0 10
EPCI1/PCI1 11
3V66_1/VCH
PCI2 12
EPCI3/PCI3 13
VDD 14
/2
PCI(0:6)
VSS 15
PCI_F(0:2)
PCI4 16
PCI5 17
48M_USB
PCI6 18
VDD 19
48M_DOT
VSS 20
3V66_2 21
3V66_3 22
3V66_4 23
3V66_5 24
PD# 25
3V66[2:5]
VDDA 26
VSSA 27
VTT_PWRGD# 28
56 REF
55 S1
54 S0
53 CPU_STP#
52 CPUT0
51 CPUC0
50 VDD
49 CPUT1
48 CPUC1
47 VSS
46 VDD
45 CPUT2
44 CPUC2
43 MULT0
42 IREF
41 VSSIREF
40 S2
39 48M_USB
38 48M_DOT
37 VDD
36 VSS
35 3V66_1/VCH
34 PCI_STP#
33 3V66_0
32 VDD
31 VSS
30 SCLK
29 SDATA
Note:
1. TCLK is a test clock driven on the XTAL_IN input during test mode. M = driven to a level between 1.0V and 1.8V. If the S2 pin is at a M level during power-up, an
0 state will be latched into the device’s internal state register.
Cypress Semiconductor Corporation • 3901 North First Street • San Jose, CA 95134 • 408-943-2600
Document #: 38-07617 Rev. **
Revised December 17, 2003