mb90f378 Fujitsu Microelectronics, Inc., mb90f378 Datasheet - Page 44

• Manufacturer Part Number: mb90f378
• Description: 16-bit Proprietary Microcontroller
• Manufacturer: Fujitsu Microelectronics, Inc.

44
MB90378 Series
• PLL operation guarantee range
* : When using a crystal oscillator or a ceramic oscillator, the maximum oscillation clock frequency is 16 MHz.
Relationship between machine clock frequency and power supply voltage
1.5
Relationship between external clock frequency and machine clock frequency
20
16
12
8
4
3.6
3.0
2.7
3
4
1.5 3 4
×
5
4
Operation guarantee range of PLL
Normal operation guarantee range
Guaranteed oscillation frequency range
6.67
×
3
8
×
10
2
Machine clock f
12
Guaranteed oscillation frequency range
16
External clock F
CP
(MHz)
× 1
20
C
(MHz)*
16
24
20
32
×
1
2
(PLL off)