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| 型號(hào)： | IMISC670DYB |
| 元件分類： | 時(shí)鐘產(chǎn)生/分配 |
| 英文描述： | PROC SPECIFIC CLOCK GENERATOR, PDSO48 |
| 文件頁(yè)數(shù)： | 1/12頁(yè) |
| 文件大?。?/td> | 505K |
| 代理商： | IMISC670DYB |
SC670
I
2C Clock Generator for Pentium Notebook Designs.
Approved Product
INTERNATIONAL MICROCIRCUITS, INC. 525 LOS COCHES ST.
Rev.1.4
6/20/97
MILPITAS, CA 95035. TEL: 408-263-6300. FAX 408-263-6571
Page 1 of 12
PRODUCT FEATURES
Supports Pentium & Pro CPUs.
4 CPU clocks up to 8 loads.
Up to 8 SDRAM clocks for 2 DIMs.
Supports Power Savings Frequencies.
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
BLOCK DIAGRAM
REF
OSC
Xin
Xout
3
REF0:1
IOAPIC0
Vddq2
PLL1
SEL
4
CPUCLK0~3
Vddq2
8
SDRAM0~7
Vddq3
dly
6
PCICLK0~5
PLL2
48/24MHZ
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
V d d
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
N/C
Vdd
SDCLK
IMISC670
Note 1: N/C is a no connect pin. IMI product does not
require CPU 3.3_2.5# select line to operate properly at
2.5 volts. This pin may be connected externally to Vdd
or Vss.
(See note 1)
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