M38258MCM Datasheet, PDF (33/70 Pages) Mitsubishi Electric Semiconductor – SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

MITSUBISHI MICROCOMPUTERS
3825 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
LCD Display RAM
Address 004016 to 005316 is the designated RAM for the LCD dis-
play. When “1” are written to these addresses, the corresponding
segments of the LCD display panel are turned on.
LCD Drive Timing
The LCDCK timing frequency (LCD drive timing) is generated in-
ternally and the frame frequency can be determined with the fol-
lowing equation;
(frequency of count source for LCDCK)
f(LCDCK)=
(divider division ratio for LCD)
f(LCDCK)
Frame frequency=
duty ratio
Fig. 31 LCD display RAM map
Bit
7
6
5
4
3
2
1
0
Address
COM3 COM2 COM1 COM0 COM3 COM2 COM1 COM0
004016
SEG1
SEG0
004116
SEG3
SEG2
004216
SEG5
SEG4
004316
SEG7
SEG6
004416
SEG9
SEG8
004516
004616
SEG11
SEG13
SEG10
SEG12
004716
SEG15
SEG14
004816
SEG17
SEG16
004916
SEG19
SEG18
004A16
SEG21
SEG20
004B16
SEG23
SEG22
004C16
SEG25
SEG24
004D16
SEG27
SEG26
004E16
SEG29
SEG28
004F16
SEG31
SEG30
005016
SEG33
SEG32
005116
SEG35
SEG34
005216
SEG37
SEG36
005316
SEG39
SEG38
33