2 lcd_a controller operation, 1 lcd memory, 2 blinking the lcd – Texas Instruments MSP430x4xx User Manual
Page 354
LCD_A Controller Operation
19-4
LCD_A Controller
19.2 LCD_A Controller Operation
The LCD_A controller is configured with user software. The setup and
operation of the LCD_A controller is discussed in the following sections.
19.2.1 LCD Memory
The LCD memory map is shown in Figure 19−2. Each memory bit corresponds
to one LCD segment, or is not used, depending on the mode. To turn on an
LCD segment, its corresponding memory bit is set.
Figure 19−2. LCD memory
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3
2
1
0
3
2
1
0
Associated
Common Pins
097h
Address
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098h
099h
09Ah
09Bh
09Ch
09Dh
09Eh
09Fh
0A0h
0A1h
0A2h
0A3h
0A4h
29, 28
27, 26
25, 24
23, 22
21, 20
19, 18
17, 16
15, 14
13, 12
11, 10
9, 8
7, 6
5, 4
3, 2
1, 0
7
0
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Associated
Segment Pins
Sn+1
Sn
28
26
24
22
20
18
16
14
12
10
8
6
4
2
0
n
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092h
093h
094h
095h
096h
31, 30
33, 32
35, 34
37, 36
39, 38
30
32
34
36
38
091h
19.2.2 Blinking the LCD
The LCD controller supports blinking. The LCDSON bit is ANDed with each
segment’s memory bit. When LCDSON = 1, each segment is on or off
according to its bit value. When LCDSON = 0, each LCD segment is off.