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M35074 Scheda tecnica(PDF) 18 Page - Renesas Technology Corp

Il numero della parte M35074
Spiegazioni elettronici  SCREEN CHARACTER and PATTERN DISPLAY CONTROLLERS
PDF  44 Pages
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Produttore elettronici  RENESAS [Renesas Technology Corp]
Homepage  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

M35074 Scheda tecnica(HTML) 18 Page - Renesas Technology Corp

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MITSUBISHI MICROCOMPUTERS
M35074-XXXSP
SCREEN CHARACTER and PATTERN DISPLAY CONTROLLERS
17
(2) To set display frequency range
Whenever setting display frequency (when EXCK1 = "0",
EXCK0 = "1", or EXCK1 = "1", EXCK0 = "1"), always set the
display frequency range in accordance with the display
frequency. This range is set from DIVS0, DIVS1, DIVS2,
RSEL0 and RSEL1 (address 12016). Frequency ranges are
given here below.
(3) Notes on setting display frequency
To change external clock (display) frequency or horizontal syn-
chronization frequency, always use the following procedures.
To set EXCK1 = "0", EXCK0 = "1"
(a) Turn the display OFF. … DSPON (address 12716) = "0"
(b) Set the display frequency. … Set from DIV11 to
DIV0, DIVS0, DIVS1, DIVS2, RSEL0 and RSEL1 (ad-
dress 12016).
(c) Wait 20 ms while the horizontal synchronization signal is
being input.
(d) Turn the display ON. … DSPON (address 12716) = "1"
To set EXCK1 = "1", EXCK0 = "1"
(a) Turn the display OFF. … DSPON (address 12716) = "0"
(b) Set the display frequency. … Set from DIV11 to DIV0,
DIVS0, DIVS1, DIVS2, RSEL0 and RSEL1 (address
12016).
(c) Wait 20 ms while the horizontal synchronization signal
and external clock are being input.
(d) Turn the display ON. … DSPON (address 12716) = "1"
RSEL1
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
RSEL0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
DIVS1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
DIVS0
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
DIVS2
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
Display frequency range MHz
112.0 to 120.0
104.0 to 112.0
93.0 to 104.0
80.0 to 93.0
75.0 to 80.0
69.5 to 75.0
62.0 to 69.5
55.0 to 62.0
—
52.0 to 55.0
46.5 to 52.0
40.0 to 46.5
37.5 to 40.0
35.0 to 37.5
31.0 to 35.0
27.5 to 31.0
—
26.0 to 27.5
23.5 to 26.0
20.0 to 23.5



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