參數(shù)資料
型號： MPC8313ZQAGD
廠商： FREESCALE SEMICONDUCTOR INC
元件分類： 微控制器/微處理器
英文描述： 32-BIT, 400 MHz, MICROPROCESSOR, PBGA516
封裝： 27 X 27 MM, 2.25 MM HEIGHT, 1 MM PITCH, TEPBGAII-516
文件頁數(shù)： 92/100頁
文件大?。?/td> 1247K
代理商： MPC8313ZQAGD
MPC8313E PowerQUICC II Pro Processor Hardware Specifications, Rev. 3
Freescale Semiconductor
91
System Design Information
Figure 60. 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 72 summarizes the signal impedance targets. The driver impedance are targeted at minimum VDD,
nominal NVDD, 105°C.
22.7
Configuration Pin Muxing
The MPC8313E 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
Ω 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 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 72. Impedance Characteristics
Impedance
Local Bus, Ethernet,
DUART, Control,
Configuration, Power
Management
PCI Signals
(Not Including PCI
Output Clocks)
PCI Output Clocks
(Including
PCI_SYNC_OUT)
DDR DRAM
Symbol
Unit
RN
42 Target
25 Target
42 Target
20 Target
Z0
Ω
RP
42 Target
25 Target
42 Target
20 Target
Z0
Ω
Differential
NA
ZDIFF
Ω
Note: Nominal supply voltages. See Table 1, TJ = 105°C.
NVDD
VSS
Pad
Data
SW1
SW2
RN
RP
相關(guān)PDF資料
PDF描述
MPC8313ECVRAFFB 32-BIT, 333 MHz, MICROPROCESSOR, PBGA516
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MPC8313VRAGDA 32-BIT, 400 MHz, MICROPROCESSOR, PBGA516
MPC8313VRAFFB 32-BIT, 333 MHz, MICROPROCESSOR, PBGA516
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MPC8313ZQAGDC 功能描述:微處理器 - MPU 8313 REV2.2 PB NO ENC 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
MPC8313ZQGDD 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:PowerQUICC? II Pro Processor Hardware Specifications
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MPC8313ZQGDF 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:PowerQUICC? II Pro Processor Hardware Specifications
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