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): 4/9頁(yè)
文件大小: 105K
代理商: CMA8864-04
CMEI 4 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
Byte 0 : Function and Frequency Select Register (1=enable, 0=disable)
Bit
PIN#
@Pup
Description
Must be 0 for normal operation.
0 --
ó
1.5% frequency modulation.
1 --
ó
.5% frequency modulation.
Bit6
Bit5
Bit4
CPU, SDRAM
6
5
4
--
0
1
1
1
0
0
0
0
0
0
0 -- Frequency is selected by hardware select, latched inputs.
3
--
0
1 -- Frequency is selected by Bit 6 : 4.
Must be 0 for normal operation.
0 -- Frequency modulation center spread type.
1 -- Frequency modulation down spread type.
0 -- Normal.
1
--
0
1 -- Frequency modulation enabled type.
0 -- Normal.
0
--
0
1 -- Tristate all outputs.
7
--
0
PCI
--
--
0
0
1
1
1
0
0
1
1
0
1
0
1
0
1
0
1
66.8
60
75
83.3
68.5
83.3
75
50
33.4 (1/2 CPU)
30 (1/2 CPU)
37.5 (1/2 CPU)
33.3 (2/5 CPU)
34.5 (1/2 CPU)
41.65 (1/2 CPU)
30 (2/5 CPU)
25 (1/2 CPU)
2
--
0
Byte 1 : CPU Active/Inactive Register (1=enable, 0=disable)
Bit
PIN#
@Pup
7
26
1
6
25
1
5
--
X
4
--
X
3
40
1
2
41
1
1
43
1
0
44
1
Description
48MHz (Active/Inactive)
24MHz (Active/Inactive)
Reserved
Reserved
CPUCLK4 (Active/Inactive)
CPUCLK3 (Active/Inactive)
CPUCLK2 (Active/Inactive)
CPUCLK1 (Active/Inactive)
Byte 2 : PCI Active/Inactive Register (1=enable, 0=disable)
Bit
PIN#
@Pup
7
--
X
6
7
1
5
15
1
4
13
1
3
12
1
2
11
1
1
10
1
0
8
1
Description
Reserved
PCICLK_F (Active/Inactive)
PCICLK6 (Active/Inactive)
PCICLK5 (Active/Inactive)
PCICLK4 (Active/Inactive)
PCICLK3 (Active/Inactive)
PCICLK2 (Active/Inactive)
PCICLK1 (Active/Inactive)
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