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參數資料
| 型號： | W312-02HT |
| 廠商： | CYPRESS SEMICONDUCTOR CORP |
| 元件分類： | XO, clock |
| 英文描述： | FTG for VIA K7 Series Chipset with Programmable Output Frequency |
| 中文描述： | 200 MHz, PROC SPECIFIC CLOCK GENERATOR, PDSO48 |
| 封裝： | SSOP-48 |
| 文件頁數： | 13/21頁 |
| 文件大小： | 143K |
| 代理商： | W312-02HT |
W312-02
Document #: 38-07259 Rev. *B
Page 13 of 21
Programmable Output Frequency, Watchdog Timer and
Recovery Output Frequency Functional Description
The Programmable Output Frequency feature allows users to
generate any CPU output frequency from the range of 50 MHz
to 248 MHz. Cypress offers the most dynamic and the simplest
programming interface for system developers to utilize this
feature in their platforms.
The Watchdog Timer and Recovery Output Frequency fea-
tures allow users to implement a recovery mechanism when
the system hangs or getting unstable. System BIOS or other
control software can enable the Watchdog timer before they
attempt to make a frequency change. If the system hangs and
a Watchdog timer time-out occurs, a system reset will be gen-
erated and a recovery frequency will be activated.
All of the related registers are summarized in
Table 6
.
Table 4. Additional Frequency Selections through Serial Data Interface Data Bytes
Input Conditions
FS4
FS3
FS2
FS1
SEL4
SEL3
SEL2
SEL1
0
0
0
0
0
0
0
0
0
0
0
1
0
0
0
1
0
0
1
0
0
0
1
0
0
0
1
1
0
0
1
1
0
1
0
0
0
1
0
0
0
1
0
1
0
1
0
1
0
1
1
0
0
1
1
0
0
1
1
1
0
1
1
1
1
0
0
0
1
0
0
0
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
0
1
1
1
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
1
1
0
1
1
1
1
0
1
1
1
0
1
1
1
1
1
1
1
1
Output Frequency
PLL Gear
Constants
(G)
48.00741
48.00741
48.00741
48.00741
48.00741
48.00741
48.00741
48.00741
48.00741
48.00741
48.00741
48.00741
48.00741
48.00741
48.00741
48.00741
Reserved
Reserved
Reserved
48.00741
48.00741
48.00741
48.00741
48.00741
48.00741
48.00741
48.00741
48.00741
48.00741
48.00741
48.00741
48.00741
FS0
SEL0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
CPU
156.0
154.0
152.0
147.0
144.0
142.0
138.0
136.0
124.0
122.0
117.0
115.0
113.0
108.0
105.0
102.0
Reserved
Reserved
Reserved
200.0
190.0
180.0
170.0
150.0
140.0
120.0
110.0
66.6
200.0
166.6
100.0
133.3
3V66
78.0
77.0
76.0
73.5
72.0
71.0
69.0
68.0
62.0
61.0
78.0
76.7
75.3
72.0
70.0
68.0
Reserved
Reserved
Reserved
66.6
76.0
72.0
68.0
75.0
70.0
60.0
73.3
66.6
66.6
66.6
66.6
66.6
PCI
39.0
38.5
38.0
36.8
36.0
35.5
34.5
34.0
31.0
30.5
39.0
38.3
37.7
36.0
35.0
34.0
Reserved
Reserved
Reserved
33.3
38.0
36.0
34.0
37.5
35.0
30.0
33.3
33.3
33.3
33.3
33.3
33.3
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