MB90F482 datasheet(85/113 Pages) FUJITSU

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MB90480/485 Series

3.6

2.7

3.0

1.5

12.5

1.5

5 6

Range of warranted PLL operation

Normal operating range

Internal clock fCP (MHz)

Internal operating clock frequency vs. Power supply voltage

Base oscillator frequency vs. Internal operating clock frequency

Base oscillator clock FCH (MHz)

• Range of warranted PLL operation

Notes:

• For A/D operating frequency, refer to “5. A/D Converter Electrical Characteristics”

• Only at 1 multiplied PLL, use with more than fcp = 4 MHz.

No multiplied

*1 : In setting as 1, 2, 3 and 4 multiplied PLL, when the internal clock is used at 20 MHz < fcp

≤ 25 MHz, set

the PLLOS register to “DIV2 bit

= 1” and “PLL2 bit = 1”.

[Example]

When using the base oscillator frequency of 24 MHz at 1 multiplied PLL :

CKSCR register : CS1 bit

= “0”, CS0 bit = “0”

PLLOS register : DIV2 bit

= “1”, PLL2 bit = “1”

[Example]

When using the base oscillator frequency of 6 MHz at 3 multiplied PLL :

CKSCR register : CS1 bit

= “1”, CS0 bit = “0”

PLLOS register : DIV2 bit

= “1”, PLL2 bit = “1”

*2 : In setting as 2 and 4 multiplied PLL, when the internal clock is used at 20 MHz < fcp

≤ 25 MHz, the following

setting is also enabled.

2 multiplied PLL : CKSCR register : CS1 bit

= “0”, CS0 bit = “0”

PLLOS register : DIV2 bit

= “0”, PLL2 bit = “1”

4 multiplied PLL : CKSCR register : CS1 bit

= “0”, CS0 bit = “1”

PLLOS register : DIV2 bit

= “0”, PLL2 bit = “1”

*3 : When using in setting as 6 and 8 multiplied PLL, set the PLLOS register to “DIV2 bit

= 0” and “PLL2 bit = 1”.

[Example]

When using the base oscillator frequency of 4 MHz at 6 multiplied PLL :

CKSCR register : CS1 bit

= “1”, CS0 bit = “0”

PLLOS register : DIV2 bit

= “0”, PLL2 bit = “1”

[Example]

When using the base oscillator frequency of 3 MHz at 8 multiplied PLL :

CKSCR register : CS1 bit

= “1”, CS0 bit = “1”

PLLOS register : DIV2 bit

= “0”, PLL2 bit = “1”

× *1

× *1,*2

× *1

*1,*2

× *3

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