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| 型号： | RK80530KZ017512 |
| 厂商： | INTEL CORP |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 32-BIT, 1400 MHz, MICROPROCESSOR, CPGA370 |
| 封装： | FLIP CHIP, PGA-370 |
| 文件页数： | 18/94页 |
| 文件大小： | 1775K |
| 代理商： | RK80530KZ017512 |
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Datasheet
17
Intel Pentium III Processor with 512KB L2 Cache at 1.13GHz to 1.40GHz
2.8.2
System Bus Frequency Select Signals
The System Bus Frequency Select Signals (BSEL [1:0]) are used to select the system bus
frequency for the Intel Pentium III processor. The BSEL signals are also used by the chipset and
system bus clock generator. The BSEL pins for the Intel Pentium III processor with 512KB L2
Cache are open drain signals versus opens or shorts found on the previous Intel Pentium III
processor in the FC-PGA package. Refer to Table 10 for level specifications for the BSEL signals.
The BSEL signals rely on a 3.3V pull-up resistor to set the signal to a logic high level. Similar to
the VID signals described in Section 2.6, the VTT_PWRGD signal also informs the platform that
the BSEL signals are stable and should be sampled. During power-up, the BSEL signals will be in
an indeterminate state for a small period of time. The chipset or system bus clock generator should
not sample and/or latch the BSEL signals until the VTT_PWRGD signal is asserted. The assertion
of the VTT_PWRGD signal indicates the BSEL signals are stable and are driven to the final state
by the processor. Refer to Figure 14 for power-up timing sequence for the VTT_PWRGD and the
BSEL signals.
Table 5 defines the possible combinations of the BSEL signals and the frequency associated with
each combination. The frequency selection is determined by the processor(s) and driven out to the
chipset and system bus clock generator. All system bus agents must operate at the same frequency
determined by the processor. The Intel Pentium III processor with 512KB L2 Cache operates
at 133MHz system bus frequency based on the system bus specified rating marked on the package.
Over or under-clocking the system bus frequency outside the specified rating marked on the
package is not recommended.
Figure 7. BSEL[1:0] Example for a System Design
P r oc es s o r
BSEL 0
BSEL 1
Ch i p s e t
Cl o c k
Dr i v e r
1K
oh m
K o h m
3. 3 V
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相关代理商/技术参数 |
参数描述 |
|---|---|
| RK80530KZ017512S L5XL | 制造商:Intel 功能描述:32BIT MPU 80530KZ017512 1.40G |
| RK80530KZ017512S L6BY | 制造商:Intel 功能描述:MPU Pentium 制造商:Intel 功能描述:MPU Pentium? III Processor-S 64-Bit 0.13um 1.4GHz 370-Pin FCPGA2 |
| RK80530PZ001256 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Microprocessor |
| RK80530PZ006256 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Microprocessor |
| RK80530PZ009256 | 制造商:Rochester Electronics LLC 功能描述:PIII 1.2G 256 ON DIE CACHE FC-PGA2 - Bulk |
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