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參數資料
| 型號： | W48S87 |
| 廠商： | Cypress Semiconductor Corp. |
| 英文描述： | Spread Spectrum 3 DIMM Desktop Clock |
| 中文描述： | 擴頻3個DIMM桌面時鐘 |
| 文件頁數： | 10/19頁 |
| 文件大?。?/td> | 248K |
| 代理商： | W48S87 |
W48S87-72
10
Signaling Requirements
As shown in
Figure 4
, valid data bits are defined as stable logic
0 or 1 condition on the data line during a clock HIGH (logic 1)
pulse. A transitioning data line during a clock HIGH pulse may
be interpreted as a start or stop pulse (it will be interpreted as
a start or stop pulse if the start/stop timing parameters are
met).
A write sequence is initiated by a
“
start bit
”
as shown in
Figure
5
. A
“
stop bit
”
signifies that a transmission has ended.
As stated previously, the W48S87-72 sends an
“
acknowledge
”
pulse after receiving eight data bits in each byte as shown in
Figure 6
.
Sending Data to the W48S87-72
The device accepts data once it has detected a valid start bit
and address byte sequence. Device functionality is changed
upon the receipt of each data bit (registers are not double buff-
ered). Partial transmission is allowed meaning that a transmis-
sion can be truncated as soon as the desired data bits are
transmitted (remaining registers will be unmodified). Transmis-
sion is truncated with either a stop bit or new start bit (restart
condition).
6'$7$
6&/2&.
9DOLG
'DWD
%LW
&KDQJH
RI 'DWD $OORZHG
Figure 4. Serial Data Bus Valid Data Bit
6'$7$
6&/2&.
6WDUW
%LW
6WRS
%LW
Figure 5. Serial Data Bus Start and Stop Bit
相關PDF資料 |
PDF描述 |
|---|---|
| W48S87-72 | Desktop/Notebook Frequency Generator(桌上型電腦/筆記本電腦系統頻率發生器) |
| W49F002 | 256K X 8 CMOS FLASH MEMORY |
| W49F002U-12B | MB 32C 32#20 SKT RECP |
| W49F002U-70B | 256K X 8 CMOS FLASH MEMORY |
| W49F002U-90B | 256K X 8 CMOS FLASH MEMORY |
相關代理商/技術參數 |
參數描述 |
|---|---|
| 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 |
| W48S87-72XT | 制造商:Rochester Electronics LLC 功能描述:- Tape and Reel |
| W49 | 制造商:CERAMATE 制造商全稱:CERAMATE 功能描述:3-Phase Motor Driver for CD-ROMs |
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