參數(shù)資料
型號(hào)： MPC8308CVMAFD
廠商： FREESCALE SEMICONDUCTOR INC
元件分類： 微控制器/微處理器
英文描述： 32-BIT, 266 MHz, MICROPROCESSOR, PBGA473
封裝： 19 X 19 MM, 0.80 MM PITCH, 1.39 MM HEIGHT, LEAD FREE, MAPBGA-473
文件頁(yè)數(shù)： 83/88頁(yè)
文件大?。?/td> 2550K
代理商： MPC8308CVMAFD
MPC8308 PowerQUICC II Pro Processor Hardware Specification, Rev. 1
84
Freescale Semiconductor
System Design Information
Figure 55. Driver Impedance Measurement
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 60 summarizes the signal impedance targets. The driver impedance are targeted at minimum VDD,
nominal NVDD, 105°C.
23.6
Configuration Pin Muxing
The device provides the user with power-on configuration options that can be set through the use of
external pull-up or pull-down resistors of 4.7 K
Ω on certain output pins (see customer-visible
configuration pins). These pins are generally used as output-only pins in normal operation.
While PORESET is asserted, these pins are treated as inputs. The value presented on these pins while
PORESET is asserted is latched when PORESET deasserts, at which time the input receiver is disabled
and the I/O circuit takes on its normal function. Careful board layout with stubless connections to these
pull-up/pull-down resistors coupled with the large value of the pull-up/pull-down resistor should minimize
the disruption of signal quality or speed for output pins thus configured.
Table 60. Impedance Characteristics
Impedance
Local Bus, Ethernet, DUART, Control,
Configuration, Power Management
DDR DRAM
Symbol
Unit
RN
42 Target
20 Target
Z0
Ω
RP
42 Target
20 Target
Z0
Ω
Note: Nominal supply voltages. See Table 2, Tj = 105°C.
NVDD
VSS
RP
RN
Pad
Data
SW1
SW2
相關(guān)PDF資料
PDF描述
MPC8309CVMAGDCA 32-BIT, 400 MHz, RISC PROCESSOR, PBGA489
MPC8309CVMADFCA 32-BIT, 266 MHz, RISC PROCESSOR, PBGA489
MPC8309CVMAHFCA 32-BIT, 417 MHz, RISC PROCESSOR, PBGA489
MPC8313EVRAFF 32-BIT, 333 MHz, MICROPROCESSOR, PBGA516
MPC8313EVRAGD 32-BIT, 400 MHz, MICROPROCESSOR, PBGA516
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MPC8308CVMAFDA 功能描述:微處理器 - MPU E300 ext tmp Qual 333 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
MPC8308CVMAGD 功能描述:微處理器 - MPU E300 EXT TMP 400 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
MPC8308CVMAGDA 功能描述:微處理器 - MPU E300 EXT TMP 400 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
MPC8308CZQADD 功能描述:微處理器 - MPU E300 ext tmp Qual266 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
MPC8308CZQADDA 功能描述:微處理器 - MPU E300 ext tmp Qual266 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
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*