ST7093 Просмотр технического описания (PDF) - Sitronix Technology Co., Ltd.
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ST7093 Datasheet PDF : 43 Pages
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ST7093
Display Data RAM (DDRAM)
Display data RAM (DDRAM) stores display data represented in 8-bit character codes. Its extended capacity is 64
x 8 bits, or 64 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.
z DDRAM address and corresponding display position
There is 4 line display data stored in DDRAM but only 2 lines are shown at a time. (2 line mode)
Hidden lines can be displayed by issuing line shift instruction.
Figure 1 DDRAM Address
High
Low Order
Order
bits
bits
AC AC AC AC AC AC AC AC
Example: DDRAM Address 37H
0110111
Display
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
Position
COM1~8 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F
COM9~16 10 11 12 13 14 15 16 17 18 19 1A 1B 1C 1D 1E 1F
Hidden
Hidden
20 21 22 23 24 25 26 27 28 29 2A 2B 2C 2D 2E 2F
30 31 32 33 34 35 36 37 38 39 3A 3B 3C 3D 3E 3F
Figure 2 2-Line Mode by 16-Character Display Example
Display
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
Position
COM1~8 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F
COM9~16 10 11 12 13 14 15 16 17 18 19 1A 1B 1C 1D 1E 1F
COM17~24 20 21 22 23 24 25 26 27 28 29 2A 2B 2C 2D 2E 2F
Hidden 30 31 32 33 34 35 36 37 38 39 3A 3B 3C 3D 3E 3F
Ver 2.1
Figure 3 3-Line Mode by 16-Character Display Example
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2003/09/23
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