m35072-059fp Mitsumi Electronics, Corp., m35072-059fp Datasheet - Page 18

• Manufacturer Part Number: m35072-059fp
• Description: Screen Character Pattern Display Controllers
• Manufacturer: Mitsumi Electronics, Corp.

(2) To set display frequency range
(3) Notes on setting display frequency
18
RSEL1
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 120
RSEL1 (address 122
below.
To change external clock (display) frequency or horizontal
synchronization frequency, always use the following
procedures.
(a) Turn the display OFF. … DSPON (address 128
(b) Set the display frequency. … Set from DIV10 to DIV0,
(c) Wait 20 ms while the horizontal synchronization signal and
(d) Turn the display ON. … DSPON (address 128
1
0
1
0
1
0
0
1
0
DIVS0, DIVS1 (address 120
RSEL1 (address 122
external clock are being input.
RSEL0
0
1
0
0
0
0
1
0
0
DIVS1
16
0
0
0
0
1
0
1
1
1
). Frequency ranges are given here
16
).
16
DIVS0
), RSEL0 address 121
16
0
0
1
0
0
1
0
1
0
), RSEL0 (address 121
Display frequency range
67.0 to 80.0
54.0 to 67.0
47.0 to 54.0
40.0 to 47.0
34.0 to 40.0
30.0 to 34.0
26.0 to 30.0
23.0 to 26.0
20.0 to 23.0
16
16
) = "1"
16
) = "0"
) and
16
) and
(MHz)
SCREEN CHARACTER and PATTERN DISPLAY CONTROLLERS
MITSUBISHI MICROCOMPUTERS
M35072-XXXFP