參數(shù)資料
型號： 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電壓時鐘合成器
文件頁數(shù)： 2/9頁
文件大小： 105K
代理商： CMA8864-04
CMEI 2 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
PIN DESCRIPTION
NAME
VDD1
REF0
/ CPU3.3#_2.5
GND
TYPE
P
I/O
NO.
DESCRIPTION
Analog 3.3V power supply for PLL core, REF, XTAL_IN/_OUT.
14.318MHz clock output.
/ Indicates VDDL2 power supply, 0=3.3V CPU, 1=2.5V CPU.
Ground.
1
2
G
3, 9, 16, 22,
27, 33, 39, 45
XTAL_IN
XTAL_OUT
VDD2
PCICLK_F
/ FS1
PCICLK1
/ FS2
PCICLK2-5
I
4
5
Crystal input.
Crystal output.
3.3V I/O power supply for PCICLK.
PCI clock output free-running, TTL compatible 3.3V.
/ Frequency select pin, latched input, internal pull-High.
PCI clock output TTL compatible 3.3V.
/ Frequency select pin, latched input, internal pull-High.
PCI clock output TTL compatible 3.3V.
O
P
I/O
6, 14
7
I/O
8
O
10, 11, 12,
13
15
PCICLK6
/ PCI_STOP#
SDRAM12-1
I/O
PCI clock output TTL compatible 3.3V.
/ halts PCICLK at logic 0 level when input low, MODE=0 (Mobil mode)
SDRAM clock output.
O
17, 18, 20,
21, 28, 29,
31, 32, 34,
35, 37, 38
19, 30, 36
20, 21, 28,
29, 31, 32,
34, 35,37, 38
23
24
25
VDD3
SDRAM10:1
P
O
3.3V I/O power supply for SDRAM, 24/48MHz.
SDRAM clock outputs powered by VDD3.
SDATA
SDCLK
24MHz
/ MODE
I
I
Data input pin for I
2
C bus.
Clock input pin for I
2
C bus.
24MHz clock output 3.3V.
MODE=1
MODE=0
48MHz clock output 3.3V.
/ Frequency select pin, latched input, internal pull-High.
CPU and Host clock output 3.3V output, powered by VDD3.
CPU and Host clock output 3.3V output, powered by VDD3.
2.5V/3.3V I/O power supply.
CPU and Host clock output 2.5V/3.3V output, powered by VDDL2.
CPU and Host clock output 2.5V/3.3V output, powered by VDDL2.
14.318MHz clock output.
/ halts CPUCLK at logic 0 level when input low, MODE=0 (Mobil mode)
14.318MHz clock output 2.5V/3.3V, powered by VDDL1.
2.5V/3.3V I/O power supply.
Pin 15 = PCICLK6
Pin 15 = CPI_STOP#
Pin 46 = REF1
Pin 46 = CPU_STOP#
I/O
48MHz
/ FS0
CPUCLK4
CPUCLK3
VDDL2
CPUCLK2
CPUCLK1
REF1
/ CPU_STOP#
IOAPIC
VDDL1
I/O
26
O
O
P
O
O
I/O
40
41
42
43
44
46
I/O
P
47
48
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