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参数资料
| 型号： | MPC8349ECZUALDB |
| 厂商： | FREESCALE SEMICONDUCTOR INC |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 32-BIT, 667 MHz, MICROPROCESSOR, PBGA672 |
| 封装： | 35 X 35 MM, 1.46 MM HEIGHT, 1 MM PITCH, TBGA-672 |
| 文件页数： | 24/87页 |
| 文件大小： | 1037K |
| 代理商： | MPC8349ECZUALDB |
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MPC8349EA PowerQUICC II Pro Integrated Host Processor Hardware Specifications, Rev. 12
30
Freescale Semiconductor
Ethernet: Three-Speed Ethernet, MII Management
8.2.4
RGMII and RTBI AC Timing Specifications
Table 31 presents the RGMII and RTBI AC timing specifications.
Table 31. RGMII and RTBI AC Timing Specifications
At recommended operating conditions with LVDD of 2.5 V ± 5%.
Parameter/Condition
Symbol1
Min
Typ
Max
Unit
Data to clock output skew (at transmitter)
tSKRGT
–0.5
—
0.5
ns
Data to clock input skew (at receiver)2
tSKRGT
1.0
—
2.8
ns
Clock cycle duration3
tRGT
7.2
8.0
8.8
ns
Duty cycle for 1000Base-T4, 5
tRGTH/tRGT
45
50
55
%
Duty cycle for 10BASE-T and 100BASE-TX3, 5
tRGTH/tRGT
40
50
60
%
Rise time (20%–80%)
tRGTR
—
0.75
ns
Fall time (80%–20%)
tRGTF
—
0.75
ns
GTX_CLK125 reference clock period
tG12
6
—8.0
—
ns
GTX_CLK125 reference clock duty cycle
tG125H/tG125
47
—
53
%
Notes:
1. In general, the clock reference symbol for this section is based on the symbols RGT to represent RGMII and RTBI timing. For
example, the subscript of tRGT represents the TBI (T) receive (RX) clock. Also, the notation for rise (R) and fall (F) times
follows the clock symbol. For symbols representing skews, the subscript is SK followed by the clock being skewed (RGT).
2. This implies that PC board design requires clocks to be routed so that an additional trace delay of greater than 1.5 ns is added
to the associated clock signal.
3. For 10 and 100 Mbps, tRGT scales to 400 ns ± 40 ns and 40 ns ± 4 ns, respectively.
4. Duty cycle may be stretched/shrunk during speed changes or while transitioning to a received packet clock domains as long
as the minimum duty cycle is not violated and stretching occurs for no more than three tRGT of the lowest speed transitioned.
5. Duty cycle reference is LVDD/2.
6. This symbol represents the external GTX_CLK125 and does not follow the original symbol naming convention.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MPC8349ECZUALFB | 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:Integrated Host Processor Hardware Specifications |
| MPC8349E-MDS | 功能描述:开发板和工具包 - 其他处理器 KIT FOR MPC8349E BDS RoHS:否 制造商:Freescale Semiconductor 产品:Development Systems 工具用于评估:P3041 核心:e500mc 接口类型:I2C, SPI, USB 工作电源电压: |
| MPC8349E-MDS-PB | 功能描述:开发板和工具包 - 其他处理器 PROCESSR BD MPC8349E RoHS:否 制造商:Freescale Semiconductor 产品:Development Systems 工具用于评估:P3041 核心:e500mc 接口类型:I2C, SPI, USB 工作电源电压: |
| MPC8349E-MDS-PBE | 功能描述:开发板和工具包 - 其他处理器 MPC8349E FAMILY ADS RoHS:否 制造商:Freescale Semiconductor 产品:Development Systems 工具用于评估:P3041 核心:e500mc 接口类型:I2C, SPI, USB 工作电源电压: |
| MPC8349E-MITXE | 功能描述:开发板和工具包 - 其他处理器 REFERENCE BRD FOR MPC834 RoHS:否 制造商:Freescale Semiconductor 产品:Development Systems 工具用于评估:P3041 核心:e500mc 接口类型:I2C, SPI, USB 工作电源电压: |
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