22 LCD DRIVER (LCD)
22-14
EPSON
S1C17704 TECHNICAL MANUAL
0x50a0: LCD Display Control Register (LCD_DCTL)
Register name Address
Bit
Name
Function
Setting
Init. R/W
Remarks
LCD Display
Control Register
(LCD_DCTL)
0x50a0
(8 bits)
D7
SEGREV
Segment output assignment control 1 Normal
0 Reverse
1
R/W
D6
COMREV
Common output assignment control 1 Normal
0 Reverse
1
R/W
D5
DSPAR
Display memory area control
1 Area 1
0 Area 0
0
R/W
D4
DSPREV
Reverse display control
1 Normal
0 Reverse
1
R/W
D3–2
–
reserved
–
–
–
0 when being read.
D1–0
DSPC[1:0]
LCD display control
DSPC[1:0]
Display
0x0
R/W
0x3
0x2
0x1
0x0
All off
All on
Normal display
Display off
D7
SEGREV: Segment Output Assignment Control Bit
Reverses the memory allocation for the SEG terminals.
1 (R/W): Normal (default)
0
(R/W):
Reverse
When SEGREV is 1 (default), the display memory addresses are allocated to the SEG pins in ascending
order; when SEGREV is set to 0, the addresses are allocated in descending order. (See Figures 22.5.1
and 22.5.2.)
D6
COMREV: Common Output Assignment Control Bit
Reverses the memory bit allocation for the COM terminals.
1 (R/W): Normal (default)
0
(R/W):
Reverse
When COMREV is 1 (default), the display memory bits are allocated to the COM pins in ascending
order; when COMREV is set to 0, the addresses are allocated in descending order. (See Figures 22.5.1
and 22.5.2.)
D5
DSPAR: Display Memory Area Control Bit
Selects the display area for 1/16 duty drive.
1 (R/W): Display area 1
0 (R/W): Display area 0 (default)
When 1/16 duty is selected for the drive duty, two screen areas are reserved in the display memory
and the area to be displayed can be selected using DSPAR. When DSPAR is set to 0, display area 0 is
selected; when it is set to 1, display area 1 is selected. For the display area, see Figure 22.5.2.
D4
DSPREV: Reverse Display Control Bit
Reverses the display (negative display) on the LCD.
1 (R/W): Normal display (default)
0 (R/W): Reverse display
Setting DSPREV to 0 reverses the display (turns black pixels white and vice versa), and setting it to 1
returns the display to normal. This operation does not affect the contents of the display memory.
D[3:2] Reserved
Содержание S1C17704
Страница 1: ...TECHNICAL MANUAL S1C17704 CMOS 16 BIT SINGLE CHIP MICROCOMPUTER ...
Страница 22: ...1 OVERVIEW 1 10 EPSON S1C17704 TECHNICAL MANUAL THIS PAGE IS BLANK ...
Страница 42: ...3 MEMORY MAP BUS CONTROL 3 12 EPSON S1C17704 TECHNICAL MANUAL THIS PAGE IS BLANK ...
Страница 82: ...6 INTERRUPT CONTROLLER ITC 6 26 EPSON S1C17704 TECHNICAL MANUAL THIS PAGE IS BLANK ...
Страница 108: ...8 CLOCK GENERATOR CLG 8 8 EPSON S1C17704 TECHNICAL MANUAL THIS PAGE IS BLANK ...
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Страница 138: ...10 I O PORTS P 10 26 EPSON S1C17704 TECHNICAL MANUAL THIS PAGE IS BLANK ...
Страница 156: ...11 16 BIT TIMERS T16 11 18 EPSON S1C17704 TECHNICAL MANUAL THIS PAGE IS BLANK ...
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