參數(shù)資料
型號(hào): MB91F647PMC
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, PQFP176
封裝: 24 X 24 MM, 1.70 MM HEIGHT, 0.50 MM PITCH, PLASTIC, LQFP-176
文件頁數(shù): 77/132頁
文件大?。?/td> 4314K
代理商: MB91F647PMC
MB91645 Series
DS07-16904-1E
49
Mode pins (MD0, MD1)
Connect the MD pin (MD0, MD1) directly to VCC or VSS pins. Design the printed circuit board such that the pull-
up/down resistance stays low, as well as the distance between the mode pins and VCC pins or VSS pins is as
short as possible and the connection impedance is low, when the pins are pulled-up/down such as for switching
the pin level and rewriting the Flash memory data. It is because of preventing the device erroneously switching
to test mode due to noise.
Notes on power-on
To ensure that the oscillator have stabilized immediately after the power is turned on, keep an “L” level input
connected to the INIT pin for the duration of the oscillator start time of the oscillator + the main oscillator
stabilization wait time.
Turn power on/off in the following order
Turning on : VDDI
→ VCC → AVCC → AVRH
Turning off : AVRH
→ AVCC → VCC → VDDI
Release the reset (INIT pin “L” level to “H” level) after the power supply has stabilized.
Caution on Operations during PLL Clock Mode
On this microcontroller, if in case the crystal oscillator breaks off or an external reference clock input stops while
the PLL clock mode is selected, a self-oscillator circuit contained in the PLL may continue its operation at its
self-running frequency.
However, Fujitsu Microelectronics will not guarantee results of operations if such failure occurs.
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