ST7032 datasheet(14/63 Pages) SITRONIX

14 / 63 page

ST7032

V1.4

2008/08/18

14/61

Display Data RAM (DDRAM)

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

x 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 7 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 8)

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

using only the ST7032, 16 characters are displayed. See Figure 8.

When the display shift operation is performed, the DDRAM address shifts. See Figure 9.

High order bits

Low order bits

AC6 AC5 AC4 AC3 AC2 AC1 AC0

Example : DDRAM Address 4F

Display Position (digit)

Figure 7. DDRAM Address

Figure 8. 1-Line Display

00 01 02 03 04 05

........

4D 4E 4F

DDRAM Address

Display Position

Figure 9. 1-Line by 16-Character Display Example

DDRAM Address

00 01 02 03

....

123

78 79 80

01 02 03 04

....

00 01 02

....

For Shift Left

For Shift Right

ST7032 Datasheet(PDF) 14 Page - Sitronix Technology Co., Ltd.