參數(shù)資料
型號(hào): MB91F647ABGL
廠商: FUJITSU LTD
元件分類: 微控制器/微處理器
英文描述: 32-BIT, FLASH, 60 MHz, RISC MICROCONTROLLER, PBGA176
封裝: 12 X 12 MM, 1.45 MM HEIGHT, 0.80 MM PITCH, PLASTIC, BGA-176
文件頁(yè)數(shù): 80/136頁(yè)
文件大?。?/td> 4055K
代理商: MB91F647ABGL
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MB91645A Series
48
DS07-16911-1E
■ HANDLING DEVICES
Power supply pins
In products with multiple VCC, VDDI and VSS pins, respective pins at the same potential are interconnected within
the device in order to prevent malfunctions such as latch-up. However, all of these pins should be connected
externally to the power supply or ground lines in order to reduce electromagnetic emission levels, to prevent
abnormal operation of strobe signals caused by the rise in the ground level, and to conform to the total output
current rating.
Moreover, connect the current supply source with the VCC, VDDI and VSS pins of this device at low impedance.
It is also advisable that a ceramic capacitor of approximately 0.1
μF be connected as a bypass capacitor between
VCC and VSS pins, and VDDI and VSS pins near this device.
Noise measurement of VDDI pins (recommended)
VDDI pins are affected with a noise because internal core type of power-supply is used, and it may be a problem
related with a radiated noise.
It is recommended to set a pad (land) to each VDDI in advance, so that ferrites (beads) can be input (set decoupling
capacitors and ferrites very close to LSI).
If a problem occurs with the radiated noise, insert ferrite parts.
(Connect the pads with 0
Ω connector if ferrite parts are no longer required.)
Example recommended pattern
LSI
Vss
VDDI
Vss
VDDI
Set a PAD.
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