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参数资料
| 型号： | MB9AF312MPMC |
| 厂商： | FUJITSU LTD |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | RISC MICROCONTROLLER, PQFP80 |
| 封装： | 12 X 12 MM, 1.70 MM HEIGHT, 0.50 MM PITCH, PLASTIC, LQFP-80 |
| 文件页数： | 26/27页 |
| 文件大小： | 1261K |
| 代理商： | MB9AF312MPMC |
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MB9A310 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.
Full-speed Buffer
Rs
28 to 44 Equiv. Imped.
Mount it as external resistance.
TxD+
TxD-
3-State Enable
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".
*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.
Trise
10%
90%
Tfall
90%
10%
D+
D-
Rising time
Falling time
See Figure 3 Low-Speed Load (Compliance Load) for conditions of external load.
96
FUJITSU SEMICONDUCTOR CONFIDENTIAL
r2.0
DS706-00012-0v01-E
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