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参数资料
| 型号： | IMISG570CYB |
| 厂商： | CYPRESS SEMICONDUCTOR CORP |
| 元件分类： | 时钟产生/分配 |
| 英文描述： | PROC SPECIFIC CLOCK GENERATOR, PDSO48 |
| 封装： | SSOP-48 |
| 文件页数： | 1/14页 |
| 文件大小： | 176K |
| 代理商： | IMISG570CYB |
SG570
I
2C Frequency Clock Generator w/ EMI Reduction Spread Spectrum Technology
for Pentium Processor Based Designs.
Preliminary
INTERNATIONAL MICROCIRCUITS, INC. 525 LOS COCHES ST.
Rev.1.1
3/23/98
MILPITAS, CA 95035. TEL: 408-263-6300. FAX 408-263-6571
Page 1 of 14
PRODUCT FEATURES
Supports Pentium Processor CPUs.
4 CPU clocks up to 8 loads.
Up to 8 SDRAM clocks for 2 DIMMs.
Supports Power Management.
7 PCI synchronous clocks.
Optional common or mixed supply mode:
(Vdd = Vddq3 = Vddq2 = 3.3V) or
(Vdd = Vddq3 = 3.3V, Vddq2 = 2.5V)
< 250ps skew CPU and SDRAM clocks.
< 250ps skew among PCI clocks.
I2C 2-Wire serial interface
Programmable registers featuring:
- enable/disable each output pin
- mode as tri-state, test, or normal
- 24/48 MHz selections
1 IOAPIC clock for multiprocessor support.
48-pin SSOP package
Spread Spectrum Technology for up to
13dB of EMI reduction
BLOCK DIAGRAM
REF
OSC
Xin
Xout
3
Buffers
REF0,1
IOAPIC0
Vddq2
PLL1
SEL
4
CPUCLK0~3
Vddq2
Buffer
Buffers
8
SDRAM0~7
Vddq3
dly
Buffers
6
PCICLK0~5
PLL2
Buffer
48/24MHZ
Buffer
PCICLK_F
SDATA
SDCLK
PCI_STOP#
CPU_STOP#
PWR_DWN#
MODE
FREQUENCY TABLE
SEL
CPU
PCI
0
60.0
30.0
1
66.6
33.3
CONNECTION DIAGRAM
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
REF1
REF0
Vss
Xin
Xout
MODE
Vddq3
PCICLK_F
PCICLK0
PCICLK1
PCICLK2
PCICLK3
PCICLK4
PCICLK5
Vss
Vddq3
SEL
SDATA
Vddq3
48/24MHZ
Vss
Vdd
SDRAM7/PCI_STOP#
SDRAM6/CPU_STOP#
Vddq3
SDRAM5
Vss
SDRAM4
SDRAM2
SDRAM1
SDRAM0
CPUCLK3
CPUCLK2
CPUCLK1
CPUCLK0
SDRAM3
Vddq3
Vss
Vddq2
Vss
PWR_DWN#
IOAPIC0
Vddq2
NC
Vdd
SDCLK
IMISC570
Purchase of I
2C components of International Microcircuits, Inc. or one of
its sublicensed Associated Companies conveys a license under the
Philips I
2C Patent Rights to use these components in an I2C system,
provided that the system conforms to the I
2C Standard Specification as
defined by Philips.
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