Maxim Integrated MAXQ Family Users Guide: MAXQ2000 Supplement - Manual (Page 84)

Table 44. 1/3 Duty Drive Example Common Signal Selection
According to the 1/3 duty drive memory map table, LCD0 should be set to 071h and LCD1 should be set to 05h as shown in Table 45.
Table 45. 1/3 Duty Drive Example Register Content
MAXQ Family User’s Guide:
MAXQ2000 Supplement
SEG7 SEG6 SEG5 SEG4 SEG3 SEG2 SEG1 SEG0
COM0 ON ON ON
COM1 off ON off
COM2 ON ON (don’t care)
COM3
BIT 7
BIT 6
COM2
BIT 5
COM1
BIT 4
COM0
BIT 3
BIT 2
COM2
BIT 1
COM1
BIT 0
COM0
LCD0 0 1 1 1 0 0 0 1
LCD1 0 0 0 0 0 1 0 1
LCD2
LCD3
1 FRAME (f FRAME )
V LCD
V LCD1
V LCD2
GND
SEG2
V LCD
V LCD1
V LCD2
GND
SEG1
V LCD
V LCD1
V LCD2
GND
COM2
V LCD
V LCD1
V LCD2
GND
COM1
V LCD
V LCD1
V LCD2
GND
COM0
V LCD
2/3 V LCD
1/3 V LCD
GND
-1/3 V
LCD
-2/3 V LCD
-V LCD
COM1–SEG1
(ON)
V LCD
2/3 V LCD
1/3 V LCD
GND
-1/3 V
LCD
-2/3 V LCD
-V LCD
COM1–SEG0
(OFF)
V LCD
V LCD1
V LCD2
GND
SEG0
Figure 17. 1/3 Duty Drive Example Waveform Timing
Maxim Integrated 84