参数资料
型号: MPC8540PXALDB
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, PBGA783
封装: 29 X 29 MM, 3.75 MM HEIGHT, 1 MM PITCH, FLIP CHIP, PLASTIC, BGA-783
文件页数: 11/104页
文件大小: 2133K
代理商: MPC8540PXALDB
MPC8540 Integrated Processor Hardware Specifications, Rev. 3.1
14
Freescale Semiconductor
Clock Timing
4
Clock Timing
4.1 System Clock Timing
Table 7 provides the system clock (SYSCLK) AC timing specifications for the MPC8540.
4.2 TSEC Gigabit Reference Clock Timing
Table 7 provides the TSEC gigabit reference clock (EC_GTX_CLK125) AC timing specifications for the MPC8540.
Table 7. SYSCLK AC Timing Specifications
Parameter/Condition
Symbol
Min
Typical
Max
Unit
Notes
SYSCLK frequency
fSYSCLK
166
MHz
1
SYSCLK cycle time
tSYSCLK
6.0
ns
SYSCLK rise and fall time
tKH, tKL
0.6
1.0
1.2
ns
2
SYSCLK duty cycle
tKHKL/tSYSCLK
40
60
%
3
SYSCLK jitter
+/- 150
ps
4, 5
Notes:
1.Caution: The CCB to SYSCLK ratio and e500 core to CCB ratio settings must be chosen such that the resulting
SYSCLK frequency, e500 (core) frequency, and CCB frequency do not exceed their respective maximum or
PLL Ratio,” for ratio settings.
2. Rise and fall times for SYSCLK are measured at 0.4 V and 2.7 V.
3. Timing is guaranteed by design and characterization.
4. This represents the total input jitter—short term and long term—and is guaranteed by design.
5. The SYSCLK driver’s closed loop jitter bandwidth should be <500 kHz at -20 dB. The bandwidth must be set low to
allow cascade-connected PLL-based devices to track SYSCLK drivers with the specified jitter.
Table 8. EC_GTX_CLK125 AC Timing Specifications
Parameter/Condition
Symbol
Min
Typical
Max
Unit
Notes
EC_GTX_CLK125 frequency
fG125
125
MHz
EC_GTX_CLK125 cycle time
tG125
8
ns
EC_GTX_CLK125 duty cycle
GMII, TBI
RGMII, RTBI
tG125H/tG125
45
47
55
53
%
1
Notes:
1. Timing is guaranteed by design and characterization.
相关PDF资料
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MPC8540PXAPDB 32-BIT, 833 MHz, MICROPROCESSOR, PBGA783
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MPC8540CPX667LB 32-BIT, 667 MHz, MICROPROCESSOR, PBGA783
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MPC8540PX667JB 32-BIT, 667 MHz, MICROPROCESSOR, PBGA783
相关代理商/技术参数
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MPC8540VT533JB 功能描述:微处理器 - MPU PQ 3 8540-DRACOM RoHS:否 制造商:Atmel 处理器系列:SAMA5D31 核心:ARM Cortex A5 数据总线宽度:32 bit 最大时钟频率:536 MHz 程序存储器大小:32 KB 数据 RAM 大小:128 KB 接口类型:CAN, Ethernet, LIN, SPI,TWI, UART, USB 工作电源电压:1.8 V to 3.3 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:FBGA-324
MPC8540VT667LB 功能描述:微处理器 - MPU PQ 3 8540-DRACOM RoHS:否 制造商:Atmel 处理器系列:SAMA5D31 核心:ARM Cortex A5 数据总线宽度:32 bit 最大时钟频率:536 MHz 程序存储器大小:32 KB 数据 RAM 大小:128 KB 接口类型:CAN, Ethernet, LIN, SPI,TWI, UART, USB 工作电源电压:1.8 V to 3.3 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:FBGA-324
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