參數(shù)資料
型號： MPC8248CVRE
廠商： Motorola, Inc.
英文描述： MPC8272 PowerQUICC II Family Hardware Specifications
中文描述： MPC8272的PowerQUICC II系列硬件規(guī)格
文件頁數(shù)： 21/56頁
文件大?。?/td> 539K
代理商： MPC8248CVRE
21
MPC8272 PowerQUICC II Family Hardware Specifications
PRELIMINARY—SUBJECT TO CHANGE WITHOUT NOTICE
For More Information On This Product,
Go to: www.freescale.com
MOTOROLA
AC Electrical Characteristics
NOTE
Generally, all MPC8272 bus and system output signals are driven from the
rising edge of the input clock (CLKin). Memory controller signals,
however, trigger on four points within a CLKin cycle. Each cycle is
divided by four internal ticks: T1, T2, T3, and T4. T1 always occurs at the
rising edge, and T3 at the falling edge, of CLKin. However, the spacing of
T2 and T4 depends on the PLL clock ratio selected, as shown in Table 13.
Figure 11 is a representation of the information in Table 13.
Figure 11. Internal Tick Spacing for Memory Controller Signals
NOTE
The UPM machine outputs change on the internal tick determined by the
memory controller programming; the AC specifications are relative to the
internal tick. Note that SDRAM and GPCM machine outputs change on
CLKin’s rising edge.
Table 13. Tick Spacing for Memory Controller Signals
PLL Clock Ratio
Tick Spacing (T1 Occurs at the Rising Edge of CLKin)
T2
T3
T4
1:2, 1:3, 1:4, 1:5, 1:6
1/4 CLKin
1/2 CLKin
3/4 CLKin
1:2.5
3/10 CLKin
1/2 CLKin
8/10 CLKin
1:3.5
4/14 CLKin
1/2 CLKin
11/14 CLKin
CLKin
T1
T2
T3
T4
CLKin
T1
T2
T3
T4
for 1:2.5
for 1:3.5
CLKin
T1
T2
T3
T4
for 1:2, 1:3, 1:4, 1:5, 1:6
F
Freescale Semiconductor, Inc.
n
.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MPC8248CVRI 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:PowerQUICC II⑩ Family Hardware Specifications
MPC8248CVRM 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:PowerQUICC II⑩ Family Hardware Specifications
MPC8248CVRMIBA 功能描述:微處理器 - MPU 266 MHz 505.4 MIPS RoHS:否 制造商:Atmel 處理器系列:SAMA5D31 核心:ARM Cortex A5 數(shù)據(jù)總線寬度:32 bit 最大時鐘頻率:536 MHz 程序存儲器大小:32 KB 數(shù)據(jù) RAM 大小:128 KB 接口類型:CAN, Ethernet, LIN, SPI,TWI, UART, USB 工作電源電壓:1.8 V to 3.3 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:FBGA-324
MPC8248CVRP 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:PowerQUICC II⑩ Family Hardware Specifications
MPC8248CVRPIEA 功能描述:微處理器 - MPU 300 MHz 570 MIPS RoHS:否 制造商:Atmel 處理器系列:SAMA5D31 核心:ARM Cortex A5 數(shù)據(jù)總線寬度:32 bit 最大時鐘頻率:536 MHz 程序存儲器大小:32 KB 數(shù)據(jù) RAM 大小:128 KB 接口類型:CAN, Ethernet, LIN, SPI,TWI, UART, USB 工作電源電壓:1.8 V to 3.3 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:FBGA-324
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