MITSUBISHI MICROCOMPUTERS
3822 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
LCD Display RAM
LCD Drive Timing
Address 004016 to 004F16 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.
The LCDCK timing frequency (LCD drive timing) is generated in-
ternally and the frame frequency can be determined with the
following equation;
(frequency of count source for LCDCK)
f(LCDCK) =
(divider division ratio for LCD)
f(LCDCK)
Frame frequency =
(duty ratio)
Bit
7
6
5
4
3
1
0
2
Address
SEG0
004016
004116
004216
004316
004416
004516
004616
004716
004816
004916
004A16
004B16
004C16
004D16
004E16
004F16
SEG1
SEG2
SEG3
SEG4
SEG5
SEG6
SEG7
SEG8
SEG9
SEG10
SEG12
SEG14
SEG16
SEG18
SEG20
SEG22
SEG24
SEG26
SEG28
SEG30
SEG11
SEG13
SEG15
SEG17
SEG19
SEG21
SEG23
SEG25
SEG27
SEG29
SEG31
COM0
COM3
COM2 COM1
COM2 COM1 COM0
COM3
Fig. 35 LCD display RAM map
37
MITSUBISHI [ Mitsubishi Group ]
