APPROVED PRODUCT
C9806J
SMBUS Frequency Clock Generator for Advanced Mobile Pentium
®
III Applications.
Product Features
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Supports Advanced Mobile Pentium® III CPU.
2 CPU clocks.
7 independent SDRAM clocks for 3 SO DIMMs.
Power Management hardware support.
7 PCI synchronous clocks.
< 175 pS skew CPU and SDRAM clocks.
< 175 pS skew among PCI clocks.
SMBUS 2-Wire serial interface
Programmable registers featuring:
Individual clock enable/disable
Mode as Tri-state, test, or normal
24/48 MHz selections
Enable/Disable SST
Available in 48-pin SSOP and TSSOP packages
Spread Spectrum Technology (SST)
™
Dial-a-Frequency Feature
Frequency Table (MHz)
S1
0
0
1
1
S0
0
1
0
1
CPU(0:1)
60
66.6
133.3
100
Table 1
PCI(_F,0:5)
30
33.3
33.3
33.3
Block Diagram
XIN
36pF
500K
36pF
XOUT
4
VDDC
Rin
cpu
2
CPU(0:1)
VDD
REF(0:3)
Pin Configuration
REF1
REF0
VSS
XIN
XOUT
S1
VDD
PCI_F
PCI0
VSS
PCI1
PCI2
PCI3
PCI4
VDD
PCI5
VSS
S0
SDATA
SCLK
VDD
24/48 MHz
24/48 MHz
VSS
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
VDD
REF3
VDD
REF2
PWR_DWN#
VSS
CPU0
CPU1
VDDC
SDRAM_IN
SDRAM_FB
VSS
SDRAM0
SDRAM1
VDDS
SDRAM2
SDRAM3
VSS
SDRAM4
SDRAM5
VDDS
CPU_STOP#
PCI_STP#
VDD
VDD
S1
S0
S1
S0
PLL1
pci
7
VDDS
7
CS#
PS#
PD#
C
D
I2CPMU
Rin
48/24
PLL2
1
VDD
1
VDD
24/48 MHz
24/48 MHz
SDRAM(_FB,0:5)
PCI(_F,0:5)
SDRAM_IN
CPU_STP#
PCI_STP#
PWR_DWN#
SCLK
SDATA
Fig.1
Cypress Semiconductor Corporation
525 Los Coches St.
Milpitas, CA 95035. Tel: 408-263-6300, Fax: 408-263-6571
http://www.cypress.com
Document#: 38-07051 Rev. **
5/23/2001
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CYPRESS [ CYPRESS SEMICONDUCTOR ]
