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參數(shù)資料
型號(hào)： W48S111
廠商： Cypress Semiconductor Corp.
英文描述： Spread Spectrum Desktop/Notebook System Frequency Generator
中文描述： 擴(kuò)頻桌面/筆記本電腦系統(tǒng)的頻率發(fā)生器
文件頁數(shù)： 5/11頁
文件大?。?/td> 137K
代理商： W48S111
W48S111-14
PRELIMINARYPRELIMI-
5
Writing Data Bytes
Each bit in the data bytes control a particular device function
except for the
“
reserved
”
bits which must be written as a logic
0. Bits are written MSB (most significant bit) first, which is bit
7.
Table 4
gives the bit formats for registers located in Data
Bytes 3
–
6.
Table 4. Data Bytes 3
–
6 Serial Configuration Map
Affected Pin
Pin No.
Pin Name
Data Byte 3
7
--
--
6
--
--
5
--
--
4
--
--
3
--
--
Table 5
details additional frequency selections that are avail-
able through the serial data interface.
Table 6
details the select functions for Byte 3, bits 1 and 0.
Note:
1.
Bits 0 and 1 of Data byte 6 in
Table 4
MUST be programmed as the same value.
Bit(s)
Control Function
Bit Control
Default
0
1
(Reserved)
SEL_2
SEL_1
SEL_0
Frequency Table
Selection
--
--
0
0
0
0
0
Refer to
Table 5
Refer to
Table 5
Refer to
Table 5
Frequency Controlled
by external SEL100/
66# pin (
Table 1
)
--
Function (See
Table 6
for function details)
Normal Operation
Test Mode
Spread Spectrum on
All Outputs Three-stated
Frequency Controlled
by BYT3 SEL_(2:0)
(
Table 5
)
--
2
--
--
--
--
(Reserved)
Bit 1
0
0
1
1
0
00
1
–
0
Bit 0
0
1
0
1
Data Byte 4
7
6
5
4
3
2
1
0
Data Byte 5
7
6
5
4
3
2
1
0
Data Byte 6
7
6
5
4
3
2
1
0
--
14
--
--
--
21
--
22
--
(Reserved)
Clock output disable
(Reserved)
(Reserved)
(Reserved)
Clock Output Disable
(Reserved)
Clock Output Disable
--
--
0
1
0
0
0
1
0
1
24/48MHz
--
--
--
CPU1
--
CPU0
Low
--
--
--
Low
--
Low
Active
--
--
--
Active
--
Active
4
PCI_F
PCI6
PCI5
--
PCI4
PCI3
PCI2
PCI1
Clock Output Disable
Clock Output Disable
Clock Output Disable
(Reserved)
Clock Output Disable
Clock Output Disable
Clock Output Disable
Clock Output Disable
Low
Low
Low
--
Low
Low
Low
Low
Active
Active
Active
--
Active
Active
Active
Active
1
1
1
0
1
1
1
1
11
10
-
8
7
6
5
--
--
24
--
--
--
27
27
--
--
(Reserved)
(Reserved)
Clock Output Disable
(Reserved)
(Reserved)
(Reserved)
Clock Output Disable
Clock Output Disable
--
--
--
--
0
0
1
0
0
0
IOAPIC
--
--
--
REF2X
REF2X
Low
--
--
--
Low
Low
Active
--
--
--
Active
Active
1
[1]
1
[1]
相關(guān)PDF資料
PDF描述
W48S87-04 Spread Spectrum 3 DIMM Desktop Clock(寬頻譜3 DIMM桌上型PC機(jī)時(shí)鐘)
W48S87-72H CPU System Clock Generator
W48S87 Spread Spectrum 3 DIMM Desktop Clock
W48S87-72 Desktop/Notebook Frequency Generator(桌上型電腦/筆記本電腦系統(tǒng)頻率發(fā)生器)
W49F002 256K X 8 CMOS FLASH MEMORY
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
W48S111-14 制造商:CYPRESS 制造商全稱:Cypress Semiconductor 功能描述:Spread Spectrum Desktop/Notebook System Frequency Generator
W48S87 制造商:CYPRESS 制造商全稱:Cypress Semiconductor 功能描述:Desktop/Notebook Frequency Generator
W48S87-04 制造商:CYPRESS 制造商全稱:Cypress Semiconductor 功能描述:Spread Spectrum 3 DIMM Desktop Clock
W48S87-72 制造商:CYPRESS 制造商全稱:Cypress Semiconductor 功能描述:Desktop/Notebook Frequency Generator
W48S87-72H 制造商:Cypress Semiconductor 功能描述:Logic and Timing, Clock Generation, Desktop/Notebook Frequency Generator
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