參數(shù)資料
型號: HCD66710A00
廠商: Hitachi,Ltd.
英文描述: (Dot Matrix Liquid Crystal Display Controller/Driver)
中文描述: (點陣式液晶顯示控制器/驅(qū)動器)
文件頁數(shù): 13/73頁
文件大小: 507K
代理商: HCD66710A00
HD66710
303
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.
AC6AC5 AC4 AC3AC2 AC1AC0
1
0
0
1
1
1
0
AC
(hexadecimal)
Example: DDRAM address 4E
High order
bits
Low order
bits
Figure 1 DDRAM Address
00
01
02
03
04
4E
4F
DDRAM
address
(hexadecimal)
Display position
(digit)
1
2
3
4
5
79
80
. . . . . . . . . . . . . . . . . .
Figure 2 1-Line Display
COM1 to 8
COM9 to 16
COM1 to 8
COM9 to 16 (Left shift display)
COM1 to 8
COM9 to 16 (
Display position
DRAM address
00 01 02 03 04
06
05
1 2 3 4 5 6 7 8
07
08 09 0A 0B 0C
0E
0D
9 10111213141516
0F
01 02 03 04 05
07
06
1 2 3 4 5 6 7 8
08
09 0A 0B 0C 0D
0F
0E
9 10111213141516
10
4F 00 01 02 03
05
04
06
07 08 09 0A 0B
0D
0C
0E
Figure 3 1-line by 16-Character Display Example
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