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参数资料
型号： MPC8245LVV333D
厂商： FREESCALE SEMICONDUCTOR INC
元件分类： 微控制器/微处理器
英文描述： 32-BIT, 333 MHz, RISC PROCESSOR, PBGA352
封装： 35 X 35 MM, 1.65 MM HEIGHT, 1.27 MM PITCH, LEAD FREE, TBGA-352
文件页数： 8/68页
文件大小： 465K
代理商： MPC8245LVV333D
MPC8245 Integrated Processor Hardware Specifications, Rev. 10
16
Freescale Semiconductor
Electrical and Thermal Characteristics
Register settings that define each DLL mode are shown in Table 9.
The DLL_MAX_DELAY bit can lengthen the amount of time through the delay line by increasing the
time between each of the 128 tap points in the delay line. Although this increased time makes it easier to
guarantee that the reference clock is within the DLL lock range, there may be slightly more jitter in the
output clock of the DLL; that is, the phase comparator shifts the clock between adjacent tap points. Refer
to the Freescale application note AN2164, MPC8245/MPC8241 Memory Clock Design Guidelines:
Part 1, for details on DLL modes and memory design.
The value of the current tap point after the DLL locks can be determined by reading bits 6–0
(DLL_TAP_COUNT) of the DLL tap count register (DTCR, located at offset 0xE3). These bits store the
value (binary 0 through 127) of the current tap point and can indicate whether the DLL advances or
decrements as it maintains the DLL lock. Therefore, for evaluation purposes, DTCR can be read for all
DLL modes that support the Tloop value used for the trace length of SDRAM_SYNC_OUT to
SDRAM_SYNC_IN. The DLL mode with the smallest tap point value in the DTCR should be used
because the bigger the tap point value, the more jitter that can be expected for clock signals. Note that
keeping a DLL mode that is locked below tap point decimal 12 is not recommended.
Table 9. DLL Mode Definition
DLL Mode
Bit 2 of Configuration
Register at 0x76
Bit 7 of Configuration
Register at 0x72
Normal tap delay,
No DLL extend
00
Normal tap delay,
DLL extend
01
Max tap delay,
No DLL extend
10
Max tap delay,
DLL extend
11
相关PDF资料
PDF描述
MPC8245TVV300D 32-BIT, 300 MHz, RISC PROCESSOR, PBGA352
MPC8245ARVV400D 32-BIT, 400 MHz, RISC PROCESSOR, PBGA352
MPC8245TZU333D 32-BIT, 333 MHz, RISC PROCESSOR, PBGA352
MPC8245TVV350D 32-BIT, 350 MHz, RISC PROCESSOR, PBGA352
MPC8245TVV300D 32-BIT, 300 MHz, RISC PROCESSOR, PBGA352
相关代理商/技术参数
参数描述
MPC8245LVV350D 功能描述:微处理器 - MPU INTEGRATED HOST PROC 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
MPC8245LZU266D 功能描述:微处理器 - MPU 266MHz 505.4MIPS 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
MPC8245LZU300D 功能描述:微处理器 - MPU 300MHz 570MIPS 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
MPC8245LZU333D 功能描述:微处理器 - MPU 333MHz 632.7MIPS 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
MPC8245LZU350D 功能描述:微处理器 - MPU 350MHz 665MIPS 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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