- 您现在的位置：买卖IC网 > PDF目录45277 > MC8640DTHX1250HE (FREESCALE SEMICONDUCTOR INC) 32-BIT, 1250 MHz, MICROPROCESSOR, CBGA1023 PDF资料下载
参数资料
| 型号： | MC8640DTHX1250HE |
| 厂商： | FREESCALE SEMICONDUCTOR INC |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 32-BIT, 1250 MHz, MICROPROCESSOR, CBGA1023 |
| 封装： | 33 X 33 MM, CERAMIC, FCBGA-1023 |
| 文件页数： | 39/130页 |
| 文件大小： | 1495K |
| 代理商： | MC8640DTHX1250HE |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页当前第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页第53页第54页第55页第56页第57页第58页第59页第60页第61页第62页第63页第64页第65页第66页第67页第68页第69页第70页第71页第72页第73页第74页第75页第76页第77页第78页第79页第80页第81页第82页第83页第84页第85页第86页第87页第88页第89页第90页第91页第92页第93页第94页第95页第96页第97页第98页第99页第100页第101页第102页第103页第104页第105页第106页第107页第108页第109页第110页第111页第112页第113页第114页第115页第116页第117页第118页第119页第120页第121页第122页第123页第124页第125页第126页第127页第128页第129页第130页
MPC8640 and MPC8640D Integrated Host Processor Hardware Specifications, Rev. 3
16
Freescale Semiconductor
Input Clocks
4.1.1
SYSCLK and Spread Spectrum Sources
Spread spectrum clock sources are an increasingly popular way to control electromagnetic interference
emissions (EMI) by spreading the emitted noise to a wider spectrum and reducing the peak noise
magnitude in order to meet industry and government requirements. These clock sources intentionally add
long-term jitter to diffuse the EMI spectral content. The jitter specification given in Table 8 considers
short-term (cycle-to-cycle) jitter only and the clock generator’s cycle-to-cycle output jitter should meet the
MPC8640 input cycle-to-cycle jitter requirement. Frequency modulation and spread are separate concerns,
and the MPC8640 is compatible with spread spectrum sources if the recommendations listed in Table 9 are
observed.
It is imperative to note that the processor’s minimum and maximum SYSCLK, core, and VCO frequencies
must not be exceeded regardless of the type of clock source. Therefore, systems in which the processor is
operated at its maximum rated e600 core frequency should avoid violating the stated limits by using
down-spreading only.
SDn_REF_CLK and SDn_REF_CLK were designed to work with a spread spectrum clock (+0 to 0.5%
spreading at 30-33 kHz rate is allowed), assuming both ends have same reference clock. For better results,
use a source without significant unintended modulation.
SYSCLK duty cycle
tKHK/tSYSCLK
40
—
60
%
3
SYSCLK jitter
—
150
ps
4, 5
Notes:
1. Caution: The MPX clock to SYSCLK ratio and e600 core to MPX clock ratio settings must be chosen such that the resulting
SYSCLK frequency, e600 (core) frequency, and MPX clock frequency do not exceed their respective maximum or minimum
operating frequencies. Refer to Section 18.2, “MPX to SYSCLK PLL Ratio,” and Section 18.3, “e600 to MPX clock 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 short term jitter only 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. Note that the frequency modulation
for SYSCLK reduces significantly for the spread spectrum source case. This is to guarantee what is supported based on
design.
Table 9. Spread Spectrum Clock Source Recommendations
At recommended operating conditions. See Table 2.
Parameter
Min
Max
Unit
Notes
Frequency modulation
—
50
kHz
1
Frequency spread
—
1.0
%
1, 2
Notes:
1. Guaranteed by design.
2. SYSCLK frequencies resulting from frequency spreading, and the resulting core and VCO frequencies, must meet the
minimum and maximum specifications given in Table 8.
Table 8. SYSCLK AC Timing Specifications (continued)
At recommended operating conditions (see Table 2) with OVDD = 3.3 V ± 165 mV.
Parameter
Symbol
Min
Typical
Max
Unit
Notes
相关PDF资料 |
PDF描述 |
|---|---|
| MC8640VU1250HE | 32-BIT, 1250 MHz, MICROPROCESSOR, CBGA1023 |
| MC8640THX1000HC | 32-BIT, 1000 MHz, MICROPROCESSOR, CBGA1023 |
| MC8640TVU1067NC | 32-BIT, 1067 MHz, MICROPROCESSOR, CBGA1023 |
| MC8641DHX1250NB | MICROPROCESSOR, CBGA1023 |
| MC8641DHX1500NB | MICROPROCESSOR, CBGA1023 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MC8640DTHX1250N | 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:Integrated Host Processor Hardware Specifications |
| MC8640DTVJ1067NE | 功能描述:IC MPU E600 DUAL CORE 1023FCCBGA 制造商:nxp usa inc. 系列:MPC86xx 包装:托盘 零件状态:在售 核心处理器:PowerPC e600 核数/总线宽度:2 ??，32 位 速度:1.067GHz 协处理器/DSP:- RAM 控制器:DDR，DDR2 图形加速:无 显示与接口控制器:- 以太网:10/100/1000 Mbps（4） SATA:- USB:- 电压 - I/O:1.8V，2.5V，3.3V 工作温度:-40°C ~ 105°C（TA） 安全特性:- 封装/外壳:1023-BCBGA，FCCBGA 供应商器件封装:1023-FCCBGA（33x33） 附加接口:DUART，HSSI，I2C，RapidIO 标准包装:24 |
| MC8640DTVU1000H | 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:Integrated Host Processor Hardware Specifications Addendum for the MC8640xTxxyyyyaC Series |
| MC8640DTVU1000HC | 功能描述:微处理器 - MPU G8 REV2.1 1.05V -40/105C 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 |
| MC8640DTVU1000HE | 功能描述:微处理器 - MPU G8 REV3.0 0.95V 105C 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 |
发布紧急采购，3分钟左右您将得到回复。