參數(shù)資料
型號： MPC8377VRANG
廠商： Freescale Semiconductor
文件頁數(shù)： 27/127頁
文件大?。?/td> 0K
描述： MPU POWERQUICC II PRO 689-PBGA
標(biāo)準(zhǔn)包裝： 27
系列： MPC83xx
處理器類型： 32-位 MPC83xx PowerQUICC II Pro
速度： 800MHz
電壓： 1.05V
安裝類型： 表面貼裝
封裝/外殼： 689-BBGA 裸露焊盤
供應(yīng)商設(shè)備封裝： 689-TEPBGA II（31x31）
包裝： 托盤
MPC8377E PowerQUICC II Pro Processor Hardware Specifications, Rev. 8
122
Freescale Semiconductor
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.
This table summarizes the signal impedance targets. The driver impedance are targeted at minimum VDD,
nominal OVDD, 105°C.
25.5
Configuration Pin Muxing
The device 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.
25.6
Pull-Up Resistor Requirements
The device requires high resistance pull-up resistors (10 k
Ω is recommended) on open drain type pins
including I2C pins and IPIC interrupt pins.
For more information on required pull-up resistors and the connections required for the JTAG interface,
see AN3665, “MPC837xE Design Checklist.”
26 Ordering Information
Ordering information for the parts fully covered by this specification document is provided in
Table 83. 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
W
RP
42 Target
25 Target
42 Target
20 Target
Z0
W
Differential
NA
ZDIFF
W
Note: Nominal supply voltages. See Table 2, Tj = 105°C.
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參數(shù)描述
MPC8377VRANGA 功能描述:微處理器 - MPU 8377 PBGA ST PbFr 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
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