參數(shù)資料
型號: MB9BF305RAPMC
元件分類: 微控制器/微處理器
英文描述: 32-BIT, FLASH, 80 MHz, RISC MICROCONTROLLER, PQFP120
封裝: 16 X 16 MM, 1.70 MM HEIGHT, 0.50 MM PITCH, PLASTIC, LQFP-120
文件頁數(shù): 96/104頁
文件大?。?/td> 1005K
代理商: MB9BF305RAPMC
91
FUJITSU SEMICONDUCTOR CONFIDENTIAL
r3.0
MB9B300A Series
*6 : USB Full-speed connection is performed via twist pair cable shield with 90 ± 15% characteristic
impedance(Differential Mode).
USB standard defines that output impedance of USB driver must be in range from 28to 44. So, discrete
series resistor (Rs) addition is defined in order to satisfy the above definition and keep balance.
When using this USB FLS I/O, use it with 25 to 30(recommendation value 27)series resistor Rs.
*7 : They indicate rise time (Trise) and fall time (Tfall) of the low-speed differential data signal.
They are defined by the time between 10% and 90% of the output signal voltage.
See Figure 3 Low-Speed Load (Compliance Load) for conditions of external load.
Rs series resistor 25 to 30
Series resistor of 27(recommendation value) must be added.
And, use "resistance with an uncertainty of 5% by E24
sequence".
Full-speed Buffer
Rs
TxD+
TxD-
3-State Enable
28 to 44 Equiv. Imped.
Mount it as external resistance.
Trise
10%
90%
Tfall
Rising time
Falling time
D-
D+
10%
90%
DS706-00024-1v0-E
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