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參數(shù)資料
| 型號(hào)： | CMA8864-04 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | I2C, Mixed Voltage clock Synthesizer with Buffer for PENTIUMTM & II CPU/PCI system |
| 中文描述： | I2C和混合帶緩沖區(qū)PENTIUMTM電壓時(shí)鐘合成器 |
| 文件頁(yè)數(shù)： | 1/9頁(yè) |
| 文件大?。?/td> | 105K |
| 代理商： | CMA8864-04 |
CMEI 1 CMA8864-04
6F, No. 100, Sec. 4, Civil Boulevard, Taipei, Taiwan
TEL: (02)8773-1100 FAX: 886-2-8773-2211
WWW : http://www.cmedia.com.tw
Ver. 1.2
CMA8864-04 I
2
C, Mixed Voltage clock Synthesizer with Buffer
(3 DIMM)
for PENTIUM
TM
& II CPU/PCI system (CK3D)
FEATURES
l
Supports Pentium and Pentium II CPUs.
l
Two (2) copies of CPUCLK clock powered with
VDDL2, two (2) copies of CPUCLK powered
with VDD3..
l
Twelve (12) SDRAM clocks powered by VDD3.
l
Seven (7) copies of PCI clock (1/2 CPU clock or
asynchronous 2/5 CPU clock).
l
IOAPIC clock @14.318MHz driven by VDDL1.
l
24/48 MHz outputs (3.3V TTL)
l
Two Ref. Clock @ 14.318MHz (3.3V TTL).
l
l
60mA buffer switching current @3.3V.
Optional common or mixed power supply mode
2
VDD1, 2, 3 = VDDL2, 1 = 3.3V
2
VDD1, 2, 3 = 3.3V; VDDL2, 1 = 2.5V
l
< 250ps skew between CPU/SDRAM buffers.
l
<500ps skew between PCI buffers.
l
Power management controlled by CPU_STOP#,
PCI_STOP#.
l
I
2
C Serial configuration interface.
l
48 pins SSOP package.
PIN CONFIGURATIONS
POWER GROUPS
VDD1=REF, XTAL_IN, XTAL_OUT, PLL CORE
VDD2=PCICLK
VDD3=SDRAM, 24/48MHz, CPUCLK3- 4
VDDL1=IOAPIC
VDDL2=CPUCLK1-2
VDD1
*REF0 / CPU3.3#_2.5
GND
XTAL_IN
XTAL_OUT
VDD2
*PCICLK_F / FS1
*PCICLK1 / FS2
GND
PCICLK2
PCICLK3
PCICLK4
PCICLK5
VDD2
PCICLK6 / PCI_STOP#
GND
SDRAM12
SDRAM11
VDD3
SDRAM10
SDRAM9
GND
SDATA
SDCLK
I
2
C
VDDL1
IOAPIC
REF1 / CPU_STOP#
GND
CPUCLK1
CPUCLK2
VDDL2
CPUCLK3
CPUCLK4
GND
SDRAM1
SDRAM2
VDD3
SDRAM3
SDRAM4
GND
SDRAM5
SDRAM6
VDD3
SDRAM7
SDRAM8
GND
48MHz / FS0*
24MHz / MODE*
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
2.5V / 3.3V
I/O PINS
*Internal pull-up
resistor 240
￡
on indicated pins.
[
to 3.3V
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