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參數(shù)資料
| 型號： | C9837AT |
| 廠商： | CYPRESS SEMICONDUCTOR CORP |
| 元件分類： | 時鐘產(chǎn)生/分配 |
| 英文描述： | PROC SPECIFIC CLOCK GENERATOR, PDSO48 |
| 封裝： | TSSOP-48 |
| 文件頁數(shù)： | 1/20頁 |
| 文件大?。?/td> | 316K |
| 代理商： | C9837AT |
+/+
…when timing is critical
C9837
Low EMI Clock Generator for Intel
Mobile 133MHz/2 SO-DIMM Chipset Systems
Preliminary
INTERNATIONAL MICROCIRCUITS, INC. 525 LOS COCHES ST.,
Rev 1.0
3/30/2000
MILPITAS, CA 95035, USA TEL: 408-263-6300, FAX 408-263-6571
Page 1 of 20
http://www.imicorp.com
Product Features
Meets Intel’s Mobile 133.3MHz Chipset
2-CPU Clocks (66.6/100/133.3MHz, 2.5V)
4-SDRAM Clocks, 1-DCLK (100/133.3MHz, 3.3V)
2-IOAPIC Clocks, Synchronous to CPU Clock
6-PCI Clocks, and One Free Running
1-REF Clock
2-48MHz fixed non SSCG Clocks (USB and DOT)
3- 3V66 Clocks (66.6MHz, 3.3V) ICH, HUBLINK
and AGP memory
Power management using Power Down , CPU Stop
and PCI Stop pins
3 Function Select pins (include test-mode select)
IMI Spread Spectrum for best EMI reduction
I
2C Support with read back
48 Pin SSOP and TSSOP Package
Function Table (MHz)
TEST#
SEL1
SEL0
CPU(0,1)
SDRAM(0:3),
DCLK
3V66(0:2)
PCI(F,1:6)
48M(0,1)
REF
IOAPIC(0,1)
0
X
0
Hi-Z
0
X
1
TCLK/2
TCLK/3
TCLK/6
TCLK/2
TCLK
TCLK/6
1
0
66.6
100.0*
66.6
33.3
48
14.318
33.3
1
0
1
100.0
100.0*
66.6
33.3
48
14.318
33.3
1
0
133.3
66.6
33.3
48
14.318
33.3
1
133.3
100.0*
66.6
33.3
48
14.318
33.3
NOTE: These are the frequencies that are selectable after power up using the SEL1 and SEL0 hardware pins. Other frequencies may be chosen
using the devices I
2C interface. See the expanded frequency for a complete listing of all of the availible frequencies
* Will be set to 133MHz, when I
2C Byte 3 Bit0 is set to logic 1.
Table 1
Block Diagram
Pin Configuration
VDDC
VDDS
VDD
VDDP
VDD
VDDS
PLL1
Rin
i2c-clk
i2c-data
tristate
pd#
s0
cpu
sdram
3v66
pci
PLL2
Rin
48
pd#
i2c-clk
i2c-data
36pF
2
4
3
7
2
1
VDD
XIN
XOUT
CPU(0,1)
SDRAM(0:3)
3V66(0:2)
PCI(1:6)
SDATA
SCLK
PD#
TEST#
48M(0,1)
DCLK
SEL0/REF
IOAPIC(0,1)
CPU_STP#
PCI_STP#
2
VDDI
VDDP
SEL1/PCI_F
1
Pci_f
s1
ioapic
VDD
XIN
XOUT
VSS
3V660
3V661
3V662
VDD
PCI_STP#
SEL1/PCI_F
PCI1
VSS
PCI2
PCI3
VDDP
PCI4
PCI5
PCI6
AVDD
VSS
48M0(USB)
48M1(DOT)
SEL0/REF
VSS
IOAPIC0
IOAPIC1
VDDI
CPU0
VDDC
CPU1
VSS
SDRAM0
SDRAM1
VDDS
SDRAM2
SDRAM3
VSS
DCLK
VDDS
CPU_STP#
TEST#
PD#
SCLK
SDATA
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
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