PS12001ARN-0 POWERTIP [Powertip Technology], PS12001ARN-0 Datasheet - Page 33

• Manufacturer Part Number: PS12001ARN-0
• Description: OUTLINE DIMENSION & BLOCK DIAGRAM
• Manufacturer: POWERTIP [Powertip Technology]

ST7066U
#" 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 1 for the relationships between DDRAM addresses and positions on the liquid
crystal display.
The DDRAM address (A
$" 1-line display (N = 0) (Figure 2)
$" 2-line display (N = 1) (Figure 4)
V2.0
When there are fewer than 80 display characters, the display begins at the head position. For
example, if using only the ST7066U, 8 characters are displayed. See Figure 3.
When the display shift operation is performed, the DDRAM address shifts. See Figure 3.
Case 1: When the number of display characters is less than 40
that the first line end address and the second line start address are not consecutive. For example, when just the
ST7066U is used, 8 characters
AC
DDRAM Address
AC6 AC5 AC4 AC3 AC2 AC1 AC0
Position
Display
(Digit)
High Order
DD
bits
) is set in the address counter (AC) as hexadecimal.
Shift Right
Shift Left
Figure 3 1-Line by 8-Character Display Example
Display
Position
Address
2 lines are displayed. See Figure 5.
DDRAM
00
For
For
1
Low Order
01
2
bits
02
3
Figure 1 DDRAM Address
00
4F
01
Figure 2 1-Line Display
1
03
4
01
02
00
2
04
5
10/42
02
03
01
3
05
6
03
04
02
4
………………..
2 lines, the two lines are displayed from the head. Note
04
05
03
5
Example: DDRAM Address 4F
1
05
06
04
6
0
06
07
05
7
0
07
08
06
8
4D 4E 4F
78
1
79
1
80
1
1
2001/03/01