参数资料
型号: MB91F644APMC
厂商: FUJITSU LTD
元件分类: 微控制器/微处理器
英文描述: RISC MICROCONTROLLER, PQFP176
封装: 24 X 24 MM, 1.70 MM HEIGHT, 0.50 MM PITCH, PLASTIC, LQFP-176
文件页数: 77/132页
文件大小: 3676K
代理商: MB91F644APMC
MB91640A Series
DS07-16910-1E
49
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.
Note: Changes of PLL clock specification from MB91640 series
MB91640A series has been modified, and specifications of the PLL macro oscillation clock frequency,
temperature range, PLL macro oscillation clock division value, and PLL multiple rate prohibit the setting of
dividing by 1.
Therefore, please use the device with setting as dividing by 2 to 4 by ODS0 or ODS1 bit in the PLL config-
uration register (PLLCR).
Example) To use the PLL clock at 60 MHz
Product type
PLL macro
oscillation clock
frequency
Temperature
range
PLL macro
oscillation clock
divider
PLL multiple rate
MB91F644
16 MHz to 60 MHz
20 °C to + 85 °C
Divided by 1 to 4
Multiplied by 15
50 MHz to 60 MHz
40 °C to + 85 °C
MB91F644A
80 MHz to 120 MHz
40 °C to + 85 °C
Divided by 2 to 4
Multiplied by 30
Product type
PLL input clock
frequency
PDS
ODS
PMS
PLL macro
oscillation clock
frequency
MB91F644
4 MHz
0000
00
1110
60 MHz
MB91F644A
4 MHz
0000
01
1110
120 MHz
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