Users Guide: MAXQ2010 Supplement User Manual

MAXQ Family User’s Guide:
MAXQ2010 Supplement
20-18
20.14 LCD Controller 1/4 Duty Cycle Drive Example
In this example, SEG0 and SEG1 are used to drive the LCD segments. The segments and common signals are con-
nected as shown in Figure 20-11.
According to the 1/4 duty drive memory map table, LCD0 should be set to 0D7h as shown in Table 20-14.
Figure 20-11. 1/4 Duty Drive Example Display Connection
Table 20-13. 1/4 Duty Drive Example Common Signal Selection
Table 20-14. 1/4 Duty Drive Example Register Content
SEG1SEG0
COM1
COM2
COM3
COM0
SEG7 SEG6 SEG5 SEG4 SEG3 SEG2 SEG1 SEG0
COM0
On Off
COM1
Off On
COM2
On On
COM3
On On
BIT 7
COM3
BIT 6
COM2
BIT 5
COM1
BIT 4
COM0
BIT 3
COM3
BIT 2
COM2
BIT 1
COM1
BIT 0
COM0
LCD0
1 1 0 1 0 1 1 1
LCD1
LCD2
LCD3