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参数资料
| 型号： | IBM25PPC750CXEJP5513T |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 32-BIT, 533 MHz, RISC PROCESSOR, PBGA256 |
| 封装： | 27 X 27 MM, PLASTIC, BGA-256 |
| 文件页数： | 11/44页 |
| 文件大小： | 416K |
| 代理商： | IBM25PPC750CXEJP5513T |
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Data Sheet
Preliminary
PowerPC 750CXe RISC Microprocessor
750cxe_DD3.1_Dev_3_gen_mkt.fm.1.5
April 8, 2004
Electrical and Thermal Characteristics
Page 11 of 36
4.3 Spread Spectrum Clock Generator (SSCG)
When designing with an SSCG, there are a number of issues that must be taken into account.
An SSCG creates a controlled amount of long-term jitter. In order for a receiving PLL in the 750CXe to
function correctly in this environment, it must be able to accurately track the SSCG clock jitter.
The accuracy with which the 750CXe PLL can track the SSCG is referred to as tracking skew. When
performing system timing analysis, the tracking skew must be added to or subtracted from the I/O timing
specifications, because the skew appears as a static phase error between the internal PLL and the SSCG
clock.
To minimize the impact on I/O timing, the following SSCG configuration is recommended:
Down-spread mode
≤ 1% of the maximum frequency
Modulation frequency of 30 kHz
Linear sweep modulation or a modulation profile (Hershey Kiss
) as shown in Figure 4-2.
In this configuration, the tracking skew is less than 100ps.
Figure 4-2. Linear Sweep Modulation Profile
0%
-1%
0
s
33.3
s
Down spread
Time
frequency
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相关代理商/技术参数 |
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|---|---|
| IBM25PPC750CXEJP7012T | 制造商:IBM Microelectronics 功能描述:MPU 750XX RISC 32BIT 0.18UM 600MHZ 1.8V/2.5V 256BGA - Trays 制造商:IBM 功能描述:IBM IBM25PPC750CXEJP7012T Co-Processors |
| IBM25PPC750CXEJP7013T | 制造商:IBM 功能描述:IBMIBM25PPC750CXEJP7013T OEM EOL151207 |
| IBM25PPC750FL-GR0123V | 制造商:IBM 功能描述:MPU 750XX RISC 32BIT - Trays |
| IBM25PPC750FL-GR0124V | 制造商:IBM 功能描述:MPU 750XX RISC 32BIT - Trays |
| IBM25PPC750FL-GR0133T | 制造商:IBM 功能描述:IBMIBM25PPC750FL-GR0133T CSOI9SG LOGIC P |
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