10 display waveform generation, 10 display waveform generation -12, Table 20-6. lcd display memory map (1/4 duty) -12 – Maxim Integrated MAXQ Family Users Guide: MAXQ2010 Supplement User Manual
Page 104: Maxq family user’s guide: maxq2010 supplement

MAXQ Family User’s Guide:
MAXQ2010 Supplement
20-12
20.10 Display Waveform Generation
Once the operational modes and display memory registers on the LCD controller have been properly initialized, the
controller generates the segment and common drive waveforms needed to display the enabled segments on the
attached LCD display.
In static mode, each segment pin is connected to a single LCD segment. There is only one common, or backplane,
signal that is driven by COM0. All on segments are driven for the entire frame period.
In x2 multiplexed mode, also known as 1/2 duty cycle mode, each segment pin can drive up to two LCD segments.
There are two common backplane signals, driven by COM0 and COM1. Each on segment is only driven for half the
frame period.
In x3 multiplexed mode, also known as 1/3 duty cycle mode, each segment pin can drive up to three LCD segments.
There are three common backplane signals, driven by COM0, COM1, and COM2. Each on segment is only driven for
1/3 the frame period.
Table 20-5. LCD Display Memory Map (1/3 Duty) (continued)
Table 20-6. LCD Display Memory Map (1/4 Duty)
REGISTER
BIT 7
BIT 6
COM2
BIT 5
COM1
BIT 4
COM0
BIT 3
BIT 2
COM2
BIT 1
COM1
BIT 0
COM0
LCD17
SEG35
SEG35
SEG35
SEG34
SEG34
SEG34
LCD18
SEG37
SEG37
SEG37
SEG36
SEG36
SEG36
LCD19
SEG39
SEG39
SEG39
SEG38
SEG38
SEG38
LCD20
SEG40
SEG40
SEG40
REGISTER
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
SEG1
SEG1
SEG1
SEG1
SEG0
SEG0
SEG0
SEG0
LCD1
SEG3
SEG3
SEG3
SEG3
SEG2
SEG2
SEG2
SEG2
LCD2
SEG5
SEG5
SEG5
SEG5
SEG4
SEG4
SEG4
SEG4
LCD3
SEG7
SEG7
SEG7
SEG7
SEG6
SEG6
SEG6
SEG6
LCD4
SEG9
SEG9
SEG9
SEG9
SEG8
SEG8
SEG8
SEG8
LCD5
SEG11
SEG11
SEG11
SEG11
SEG10
SEG10
SEG10
SEG10
LCD6
SEG13
SEG13
SEG13
SEG13
SEG12
SEG12
SEG12
SEG12
LCD7
SEG15
SEG15
SEG15
SEG15
SEG14
SEG14
SEG14
SEG14
LCD8
SEG17
SEG17
SEG17
SEG17
SEG16
SEG16
SEG16
SEG16
LCD9
SEG19
SEG19
SEG19
SEG19
SEG18
SEG18
SEG18
SEG18
LCD10
SEG21
SEG21
SEG21
SEG21
SEG20
SEG20
SEG20
SEG20
LCD11
SEG23
SEG23
SEG23
SEG23
SEG22
SEG22
SEG22
SEG22
LCD12
SEG25
SEG25
SEG25
SEG25
SEG24
SEG24
SEG24
SEG24
LCD13
SEG27
SEG27
SEG27
SEG27
SEG26
SEG26
SEG26
SEG26
LCD14
SEG29
SEG29
SEG29
SEG29
SEG28
SEG28
SEG28
SEG28
LCD15
SEG31
SEG31
SEG31
SEG31
SEG30
SEG30
SEG30
SEG30
LCD16
SEG33
SEG33
SEG33
SEG33
SEG32
SEG32
SEG32
SEG32
LCD17
SEG35
SEG35
SEG35
SEG35
SEG34
SEG34
SEG34
SEG34
LCD18
SEG37
SEG37
SEG37
SEG37
SEG36
SEG36
SEG36
SEG36
LCD19
SEG39
SEG39
SEG39
SEG39
SEG38
SEG38
SEG38
SEG38
LCD20