參數(shù)資料
型號(hào)： MPC8248CVRPIEX
廠商： FREESCALE SEMICONDUCTOR INC
元件分類： 微控制器/微處理器
英文描述： 32-BIT, 300 MHz, RISC PROCESSOR, PBGA516
封裝： 27 X 27 MM, 2.25 MM HEIGHT, 1 MM PITCH, LEAD FREE, PLASTIC, MS-034AAL-1, BGA-516
文件頁(yè)數(shù)： 15/60頁(yè)
文件大?。?/td> 918K
代理商： MPC8248CVRPIEX
MPC8272 PowerQUICC II Family Hardware Specifications, Rev. 1.5
22
Freescale Semiconductor
AC Electrical Characteristics
Figure 10 shows signal behavior in MEMC mode.
Figure 10. MEMC Mode Diagram
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
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
V_CLK
Memory controller signals
sp34/sp30
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
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MPC8248CVRT 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:PowerQUICC II⑩ Family Hardware Specifications
MPC8248CVRTIEA 功能描述:微處理器 - MPU 400 MHz 760 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(shí)鐘頻率:536 MHz 程序存儲(chǔ)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
MPC8248CVRTIEA 制造商:Freescale Semiconductor 功能描述:IC PERIPHERAL (MULTIFUNCTION) CONTROLLE
MPC8248CZQ 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:MPC8272 PowerQUICC II Family Hardware Specifications
MPC8248CZQB 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:PowerQUICC II⑩ Family Hardware Specifications
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