MSM6262 데이터 시트보기 (PDF) - Oki Electric Industry

부품명

상세내역

제조사

MSM6262

DOT MATRIX LCD CONTROLLER WITH 48-DOT COMMON DRIVER

Oki Electric Industry 

¡ Semiconductor

MSM6262-xx

6. Cursor/Blink Control Circuit

This is the circuit to control the generation of cursor and its blinking. This circuit is controlled

by the program of the CPU.

The position of the cursor and its blink appears on the position according to the ADC contents,

which correspond to the address of DD RAM. For example, when the ADC is set as "07" (hex.),

the position of cursor and its blinking becomes as follows.

DB7

–––

DB0

ADC 0 0 0 0 0 1 1 1

0

7

2-line display

Cursor and its blinking position

Digit

12 34 567 8 9

79 80

00 01 02 03 04 05 06 —07 08

80 81 82 83 84 85 86 87 88

–––

–––

4E 4F

CE CF

4-line display

Cursor and its blinking position

Digit

12 34 567 8 9

–––

39 40

00 01 02 03 04 05 06 —07 08

40 41 42 43 44 45 46 47 48

–––

–––

26 27

66 67

80 81 82 83 84 85 86 87 88

–––

A6 A7

C0 C1 C2 C3 C4 C5 C6 C7 C8

–––

E6 E7

Note: Cursor display and blinking can be performed even when the CG RAM address is

set in the ADC. So, it is necessary to disable the cursor display and blinking when

the CG RAM address is set in the ADC.

7. Underline Control Circuit

First, either underline display mode or underline blinking mode has to be set by the CPU.

When an instruction to enable the underline function is input from the CPU, the cursor

display shifts to the right direction (increment) or left direction (decrement). Display of

underline appears (or disappears) on the same position where cursor was displayed.

An input of "H" data enables the underline display, while an input of "L" data deletes the

underline.

8. Character Generator ROM (CG ROM)

CG ROM stores the character pattern. MSM6262-xx has 128 kinds of 5 x 7-dot patterns, 96

kinds of 5 x 11-dot patterns and 32 kinds of 5 x 12-dot patterns. The character pattern

corresponds to the character code which is written into the DD RAM.

The relation between 8-bit character code and character pattern is described in Table 1.

When the 8-bit character code of CG ROM is written into the DD RAM, the character pattern

of the corresponding character code of the CG ROM is displayed on the LCD position

corresponding to the DD RAM address.

When all of the upper 4 bits of CG ROM code are "L", CG ROM can be switched to CG RAM.

23/52

Share Link: