M35072-059FP Просмотр технического описания (PDF) - Mitsumi

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M35072-059FP

SCREEN CHARACTER and PATTERN DISPLAY CONTROLLERS

Mitsumi 

MITSUBISHI MICROCOMPUTERS

M35072-XXXFP

SCREEN CHARACTER and PATTERN DISPLAY CONTROLLERS

(2) To set display frequency range

Whenever setting display frequency (when EXCK1 = "1",

EXCK0 = "1"), always set the display frequency range in

accordance with the display frequency. This range is set from

DIVS0, DIVS1 (address 12016), RSEL0 address 12116) and

RSEL1 (address 12216). Frequency ranges are given here

below.

RSEL1

1

0

1

0

1

0

0

1

0

RSEL0 DIVS1

0

0

1

0

0

0

0

0

0

1

0

0

1

1

0

1

0

1

DIVS0 Display frequency range (MHz)

0

67.0 to 80.0

0

54.0 to 67.0

1

47.0 to 54.0

0

40.0 to 47.0

0

34.0 to 40.0

1

30.0 to 34.0

0

26.0 to 30.0

1

23.0 to 26.0

0

20.0 to 23.0

(3) Notes on setting display frequency

To change external clock (display) frequency or horizontal

synchronization frequency, always use the following

procedures.

(a) Turn the display OFF. … DSPON (address 12816) = "0"

(b) Set the display frequency. … Set from DIV10 to DIV0,

DIVS0, DIVS1 (address 12016), RSEL0 (address 12116) and

RSEL1 (address 12216).

(c) Wait 20 ms while the horizontal synchronization signal and

external clock are being input.

(d) Turn the display ON. … DSPON (address 12816) = "1"

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