參數(shù)資料
型號(hào)： MPC8540PXAPDB
廠商： FREESCALE SEMICONDUCTOR INC
元件分類： 微控制器/微處理器
英文描述： 32-BIT, 833 MHz, MICROPROCESSOR, PBGA783
封裝： 29 X 29 MM, 3.75 MM HEIGHT, 1 MM PITCH, FLIP CHIP, PLASTIC, BGA-783
文件頁數(shù)： 98/104頁
文件大小： 2133K
代理商： MPC8540PXAPDB
MPC8540 Integrated Processor Hardware Specifications, Rev. 3.1
Freescale Semiconductor
93
System Design Information
Figure 53. Driver Impedance Measurement
The output impedance of the RapidIO port drivers targets 200-
differential resistance. The value of this resistance
and the strength of the driver’s current source can be found by making two measurements. First, the output voltage
is measured while driving logic 1 without an external differential termination resistor. The measured voltage is V1
= Rsource × Isource. Second, the output voltage is measured while driving logic 1 with an external precision
differential termination resistor of value Rterm. The measured voltage is V2 = 1/(1/R1 + 1/R2)) × Isource. Solving for
the output impedance gives Rsource = Rterm × (V1/V2 – 1). The drive current is then Isource = V1/Rsource.
Table 59 summarizes the signal impedance targets. The driver impedance are targeted at minimum VDD, nominal
OVDD, 105°C.
17.6 Configuration Pin Muxing
The MPC8540 provides the user with power-on configuration options which can be set through the use of external
pull-up or pull-down resistors of 4.7 k
on certain output pins (see customer visible configuration pins). These pins
are generally used as output only pins in normal operation.
While HRESET is asserted however, these pins are treated as inputs. The value presented on these pins while
HRESET is asserted, is latched when HRESET deasserts, at which time the input receiver is disabled and the I/O
circuit takes on its normal function. Most of these sampled configuration pins are equipped with an on-chip gated
Table 59. Impedance Characteristics
Impedance
Local Bus, Ethernet,
DUART, Control,
Configuration, Power
Management
PCI/PCI-X
DDR DRAM
RapidIO
Symbol
Unit
RN
43 Target
25 Target
20 Target
NA
Z0
W
RP
43 Target
25 Target
20 Target
NA
Z0
W
Differential
NA
200 Target
ZDIFF
W
Note: Nominal supply voltages. See Table 1, Tj = 105°C.
OVDD
OGND
RP
RN
Pad
Data
SW1
SW2
相關(guān)PDF資料
PDF描述
MPC8540VT667LB 32-BIT, 667 MHz, MICROPROCESSOR, PBGA783
MPC8540CPX667LB 32-BIT, 667 MHz, MICROPROCESSOR, PBGA783
MPC8540CVT667LC 32-BIT, 667 MHz, MICROPROCESSOR, PBGA783
MPC8540PX667JB 32-BIT, 667 MHz, MICROPROCESSOR, PBGA783
MPC8540VT667JB 32-BIT, 667 MHz, MICROPROCESSOR, PBGA783
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MPC8540PXAQFB 功能描述:微處理器 - MPU PQ 3 DRACO-DRACOM 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
MPC8540PXAQFC 功能描述:微處理器 - MPU PQ 3 DRACO-DRACOM 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
MPC8540VT533JB 功能描述:微處理器 - MPU PQ 3 8540-DRACOM 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
MPC8540VT667LB 功能描述:微處理器 - MPU PQ 3 8540-DRACOM 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
MPC8540VT667LC 功能描述:微處理器 - MPU PQ 3 8540-DRACOM 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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