Texas Instruments MSP430x4xx - Manual (Page 365)

LCD_A Controller Operation
19-15 LCD_A Controller
19.2.8 3-Mux Mode
In 3-mux mode, each MSP430 segment pin drives three LCD segments and
three common lines, COM0, COM1 and COM2 are used. Figure 19−8 shows
some example 3-mux, 1/3 bias waveforms.
Figure 19−8. Example 3- Mux Waveforms
COM0
COM1
COM2
COM0
COM2
SP1
SP2
SP3
SP3
SP2
SP1
f
frame
V1
V
2
V4
V5
V1
V5
V1
V5
V1
0 V
−V1
V1
0 V
−V1
COM1
Resulting Voltage for
Segment e (COM0−SP1)
Segment Is Off.
Resulting Voltage for
Segment d (COM0−SP2)
Segment Is On.
SP = Segment Pin
d
e
V1
V
2
V4
V5
V1
V
2
V4
V5
V1
V
2
V4
V5