m35047 Renesas Electronics Corporation., m35047 Datasheet - Page 22

• Manufacturer Part Number: m35047
• Description: Screen Character And Pattern Display Controllers
• Manufacturer: Renesas Electronics Corporation.

(2) To set display frequency range
(3) Notes on setting display frequency
RSEL1
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 121
given here below.
To change external clock (display) frequency or horizontal syn-
chronization frequency, always use the following procedures.
To set EXCK1 = "0", EXCK0 = "1"
To set EXCK1 = "1", EXCK0 = "1"
0
0
1
1
0
0
1
0
0
1
1
0
0
1
0
0
(a) Turn the display OFF. … DSPON (address 129
(b) Set the display frequency. … Set from DIV10 to
(c) Wait 20 ms while the horizontal synchronization signal is
(d) Turn the display ON. … DSPON (address 129
(a) Turn the display OFF. … DSPON (address 129
(b) Set the display frequency. … Set from DIV10 to
(c) Wait 20 ms while the horizontal synchronization signal
(d) Turn the display ON. … DSPON (address 129
DIV0(address 120
and RSEL1 (address 121
being input.
DIV0(address 120
and RSEL1 (address 121
and external clock are being input.
RSEL0
1
0
1
0
1
0
0
1
0
1
0
1
0
0
1
0
DIVS2
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
16
16
) , DIVS0, DIVS1, DIVS2, RSEL0
) , DIVS0, DIVS1, DIVS2, RSEL0
DIVS1
0
0
0
0
0
0
1
1
1
1
1
1
1
0
0
0
16
16
16
).
).
). Frequency ranges are
DIVS0
0
0
1
1
1
1
0
0
0
1
1
1
1
0
0
0
Display frequency range MHz
90.00 to 100.00
80.00 to 90.50
73.33 to 80.67
66.67 to 74.00
60.00 to 67.33
53.33 to 60.67
50.00 to 54.00
45.00 to 50.50
40.00 to 45.50
36.67 to 40.33
33.33 to 37.00
30.00 to 33.67
26.67 to 30.33
25.00 to 27.75
22.50 to 25.25
20.00 to 22.75
16
16
16
16
) = "1"
) = "1"
) = "0"
) = "0"
SCREEN CHARACTER and PATTERN DISPLAY CONTROLLERS
MITSUBISHI MICROCOMPUTERS
M35047-XXXSP/FP
21