HD66710A00TF Просмотр технического описания (PDF) - Hitachi -> Renesas Electronics

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HD66710A00TF

Dot Matrix Liquid Crystal Display Controller/Driver

Hitachi -> Renesas Electronics 

HD66710

Display Data RAM (DDRAM)

Display data RAM (DDRAM) stores display data represented in 8-bit character codes. Its capacity is 80 ×

8 bits, or 80 characters. The area in display data RAM (DDRAM) that is not used for display can be used

as general data RAM. See Figure 1 for the relationships between DDRAM addresses and positions on the

liquid crystal display.

The DDRAM address (ADD) is set in the address counter (AC) as hexadecimal.

• 1-line display (N = 0) (Figure 2)

 When there are fewer than 80 display characters, the display begins at the head position. For

example, if using only the HD66710, 16 characters are displayed. See Figure 3.

When the display shift operation is performed, the DDRAM address shifts. See Figure 3.

High order

bits

Low order

bits

AC

(hexadecimal) AC6 AC5 AC4 AC3 AC2 AC1 AC0

Example: DDRAM address 4E

100 11 10

Figure 1 DDRAM Address

Display position

(digit)

12 3

DDRAM

address

00 01 02

(hexadecimal)

45

03 04 . . . . . . . . . . . . . . . . . .

79 80

4E 4F

Figure 2 1-Line Display

COM1 to 8

12345678

00 01 02 03 04 05 06 07

9 10 11 12 13 14 15 16

08 09 0A 0B 0C 0D 0E 0F

COM1 to 8

12345678

01 02 03 04 05 06 07 08

9 10 11 12 13 14 15 16

09 0A 0B 0C 0D 0E 0F 10

Display position

COM9 to 16

DRAM address

COM9 to 16 (Left shift display)

COM1 to 8

4F 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E

COM9 to 16 (Right shift display)

Figure 3 1-line by 16-Character Display Example

303

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