參數(shù)資料
型號(hào)： MPC755BRX300LE
廠商： MOTOROLA INC
元件分類： 微控制器/微處理器
英文描述： RISC Microprocessor Hardware Specifications
中文描述： 32-BIT, 300 MHz, RISC PROCESSOR, CBGA360
封裝： 25 X 25 MM, CERAMIC, BGA-360
文件頁(yè)數(shù)： 40/56頁(yè)
文件大?。?/td> 1652K
代理商： MPC755BRX300LE
MPC755 RISC Microprocessor Hardware Specifications, Rev. 6.1
40
Freescale Semiconductor
System Design Information
R
N
then becomes the resistance of the pull-down devices. When data is held high, SW1 is closed (SW2 is open), and
R
P
is trimmed until the voltage at the pad equals (L2)OV
DD
/2. R
P
then becomes the resistance of the pull-up devices.
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,
V
force
, 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)OV
DD
/2 and the current sourced by V
force
is measured. The voltage drop across the
pull-down device, which is equal to (L2)OV
DD
/2, is divided by the measured current to determine the output
impedance of the pull-down device, R
N
. Similarly, the impedance of the pull-up device is determined by dividing
the voltage drop of the pull-up, (L2)OV
DD
/2, by the current sank by the pull-up when the data is high and V
force
is
equal to (L2)OV
DD
/2. This method can be employed with either empirical data from a test setup or with data from
simulation models, such as IBIS.
R
P
and R
N
are designed to be close to each other in value. Then Z
0
= (R
P
+ R
N
)/2.
(L2)OV
DD
OGND
R
P
R
N
Pad
Data
SW1
SW2
(L2)OV
DD
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MPC755BRX350LE 功能描述:微處理器 - MPU 360CBGA,RV2.8,HIP4DP 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
MPC755BRX350TE 功能描述:微處理器 - MPU 360CBGA,RV2.8,HIP4DP 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
MPC755BVT300LE 功能描述:微處理器 - MPU RV2.8106C 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
MPC755BVT350LE 功能描述:微處理器 - MPU RV2.8,106C 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
MPC755CPX350LE 功能描述:微處理器 - MPU 360PBGA,RV2.8,6W 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
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