参数资料
型号: MB91F639ABGL
厂商: FUJITSU LTD
元件分类: 微控制器/微处理器
英文描述: 32-BIT, FLASH, 40 MHz, RISC MICROCONTROLLER, PBGA144
封装: 12 X 12 MM, 1.45 MM HEIGT, 0.80 MM PITCH, PLASTIC, PFBGA-144
文件页数: 79/136页
文件大小: 4123K
代理商: MB91F639ABGL
MB91635A Series
DS07-16909-2E
47
C Pin
As MB91635A series includes an internal regulator, always connect a bypass capacitor of approximately 4.7
μF
to the C pin for use by the regulator.
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 internal regulator and 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 regulator voltage stabilization wait
time + the oscillator start time of the oscillator + the main oscillator stabilization wait time.
Turn power on/off in the following order
Turning on : VCC
→ AVCC → AVRH
Turning off : AVRH
→ AVCC → VCC
Release the reset (INIT pin “L” level to “H” level) after the power supply has stabilized.
C
4.7 F
GND
VSS
MB91635A
series
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