+/+…when timing is critical
C9829B
Low EMI Clock Generator for Intel 133MHz/3DIMM Chipset Systems
Approved Product
Product Features
Frequency Table (MHz)
SEL
PCI
•
•
•
•
•
•
•
•
•
•
•
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Designed for Intel’s 133MHz/SDRAM chipset
2 copies of CPU Clock (CPU[0:1])
13 copies of SDRAM Clock (SDRAM[0:12])
7 copies of PCI Clocks
3 copies of 3V66 Clock
1 IOAPIC Clock, synchronous to PCI Clock
1 REF Clock
1 USB Clock (Non SSC)
1 DOT Clock (Non SSC)
IMI Spread Spectrum for best EMI reduction
Dial-a-Frequency™ Feature
Dial-a-dB™ Feature
(3:0)**
CPU
SDRAM 3V66 /IOAPIC
REF
DOT USB
0000
0001
0010
0011
0100
0101
0110
0111
1000
1001
1010
1011
1100
1101
1110
1111
66.67
100.00* 66.67
33.33 14.318M 48M 48M
33.33 14.318M 48M 48M
33.33 14.318M 48M 48M
33.33 14.318M 48M 48M
41.67 14.318M 48M 48M
35.64 14.318M 48M 48M
37.50 14.318M 48M 48M
40.32 14.318M 48M 48M
44.95 14.318M 48M 48M
41.67 14.318M 48M 48M
100.00 100.00* 66.67
133.33 133.33 66.67
133.33 100.00* 66.67
83.35
125.02 83.35
106.91 106.91 71.27
150.00 150.00 75.00
120.96 120.96 80.64
89.90
134.86 89.90
125.02 125.02 83.35
200.00 200.00 100.00 50.00 14.318M 48M 48M
116.87 116.87 77.91
100.00 133.33 66.67
112.00 112.00 74.67
166.53 166.53 83.27
140.00 105.00 70.00
38.96 14.318M 48M 48M
33.33 14.318M 48M 48M
37.33 14.318M 48M 48M
41.63 14.318M 48M 48M
35.00 14.318M 48M 48M
56 Pin SSOP
Block Diagram
Table1
*Will be set to 133 MHz, I2C Byte3, Bit0 is set to a Logic 1.
**Sel0 also controls TS# functionality if TS# is 0 at power up.
XIN
36pF
36pF
Pin Configuration
300K
XOUT
VDD
IOAPIC
VDDI
VSS
1
2
3
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
VSS
VDDC
CPU0
CPU1
REF / Sel1
1
REF / Sel1
VDD
4
5
VSS
VDDI
Xin
6
SDRAM0
SDRAM1
VDDS
IOAPIC
S1
apic
cpu
1
2
Xout
7
VDDC
VSS
8
VDD
9
VSS
CPU(0:1)
3V66-0
3V66-1
3V66-2
VSS
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
SDRAM2
SDRAM3
SDRAM4
SDRAM5
VDDS
Rin
VDDS
VDD
SCLK
SDATA
i2c-clk
i2c-data
SDRAM(0:12)
3V66(0:2)
sdram
13
3
PCI0 / Sel3
PCI1
SEL0
s0
3V66
pci
VSS
PCI2
VDD
VSS
PCI3
PCI4
PCI5
PCI6
Sel0
VSS
VDD
SCLK
SDATA
VSS
SDRAM6
SDRAM7
SDRAM8
SDRAM9
VDDS
VDD
pwr_dwn#
TS#/PD#
PCI(1:6)
4
1
s2
s3
PCI0/Sel3
PLL1
VSS
SDRAM10
SDRAM11
SDRAM12
TS# / PD#
DOT
VDD
VDD
DOT
Rin
48
1
1
PD#
USB/Sel2
USB / Sel2
VDD
i2c-clk
i2c-data
PLL2
Fig.1
INTERNATIONAL MICROCIRCUITS, INC. 525 LOS COCHES ST.,
MILPITAS, CA 95035, USA. TEL: 408-263-6300, FAX 408-263-6571
http://www.imicorp.com
Rev 1.3
4/12/2000
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