參數(shù)資料
型號(hào)： MPC745BVT350
廠商： FREESCALE SEMICONDUCTOR INC
元件分類： 微控制器/微處理器
英文描述： 32-BIT, 350 MHz, RISC PROCESSOR, PBGA255
封裝： 21 X 21 MM, 2.80 MM HEIGHT, 1.27 MM PITCH, LEAD FREE, PLASTIC, BGA-255
文件頁(yè)數(shù)： 35/56頁(yè)
文件大?。?/td> 1521K
代理商： MPC745BVT350
MPC755 RISC Microprocessor Hardware Specifications, Rev. 8
40
Freescale Semiconductor
System Design Information
Figure 22 describes the driver impedance measurement circuit described above.
Figure 22. Driver Impedance Measurement Circuit
Alternately, the following is another method to determine the output impedance of the MPC755. A voltage
source, Vforce, is connected to the output of the MPC755 as shown in Figure 23. Data is held low, the
voltage source is set to a value that is equal to (L2)OVDD/2 and the current sourced by Vforce is measured.
The voltage drop across the pull-down device, which is equal to (L2)OVDD/2, is divided by the measured
current to determine the output impedance of the pull-down device, RN. Similarly, the impedance of the
pull-up device is determined by dividing the voltage drop of the pull-up, (L2)OVDD/2, by the current sank
by the pull-up when the data is high and Vforce is equal to (L2)OVDD/2. This method can be employed with
either empirical data from a test setup or with data from simulation models, such as IBIS.
RP and RN are designed to be close to each other in value. Then Z0 = (RP + RN)/2.
Figure 23 describes the alternate driver impedance measurement circuit.
Figure 23. Alternate Driver Impedance Measurement Circuit
(L2)OVDD
OGND
RP
RN
Pad
Data
SW1
SW2
(L2)OVDD
BGA
Data
Pin
Vforce
OGND
相關(guān)PDF資料
PDF描述
MPC755CRX400 32-BIT, 400 MHz, RISC PROCESSOR, CBGA360
MPC745BPX300 32-BIT, 300 MHz, RISC PROCESSOR, PBGA255
MPC755CVT400 32-BIT, 400 MHz, RISC PROCESSOR, PBGA360
MPC755BPX350 32-BIT, 350 MHz, RISC PROCESSOR, PBGA360
MPC755CRX400LE 32-BIT, 400 MHz, RISC PROCESSOR, CBGA360
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MPC745BVT350LE 功能描述:微處理器 - MPU GF REV2.8105C 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
MPC745CPX350LE 功能描述:微處理器 - MPU GF REV 2.8 105C 6W 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
MPC745CPX350LE 制造商:Freescale Semiconductor 功能描述:IC 32-BIT MPU 350MHZ 255-FCPBGA
MPC745CVT350LE 功能描述:微處理器 - MPU GF REV2.8@6W 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
MPC75 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Metal Plate Cement Resistors
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