m35071-067sp Mitsumi Electronics, Corp., m35071-067sp Datasheet - Page 18

• Manufacturer Part Number: m35071-067sp
• 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 = "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 (address
120
Frequency ranges are given here below.
To change external clock (display) frequency or horizontal
synchronization frequency, always use the following
procedures.
To set EXCK1 = "0", EXCK0 = "1"
To set EXCK1 = "1", EXCK0 = "1"
1
1
0
1
0
1
0
0
1
0
(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 is
(d) Turn the display ON. … DSPON (address 128
(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
(d) Turn the display ON. … DSPON (address 128
16
), RSEL0 address 121
DIVS0, DIVS1 (address 120
and RSEL1 (address 122
being input.
DIVS0, DIVS1 (address 120
and RSEL1 (address 122
and external clock are being input.
RSEL0
1
0
1
0
0
0
0
1
0
0
DIVS1
0
0
0
0
0
1
0
1
1
1
16
DIVS0
) and RSEL1 (address 122
0
0
0
1
0
0
1
0
1
0
16
16
).
).
16
16
), RSEL0 (address 121
), RSEL0 (address 121
Display frequency range
87.0 to 90.0
67.0 to 87.0
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
16
16
) = "1"
) = "1"
) = "0"
) = "0"
16
).
(MHz)
16
16
)
)
SCREEN CHARACTER and PATTERN DISPLAY CONTROLLERS
MITSUBISHI MICROCOMPUTERS
M35071-XXXSP/FP