GMS81C5108 Datasheet, PDF (78/102 Pages) Hynix Semiconductor – HYNIX SEMICONDUCTOR INC. 8-BIT SINGLE-CHIP MICROCONTROLLERS

GMS81C5108
Write into the
LCD Memory
GOLCD:
Font data
FONT
:
CLRG
LDX
LDA
TAY
LDA
LDM
SETG
LDX
STA
XCN
STA
CLRG
:
DB
DB
DB
DB
DB
DB
DB
DB
DB
DB
#<DISPRAM
{X}
!FONT+Y
RPR,#1
#0
{X}+
{X}
1101_0111B
0000_0110B
1110_0011B
1010_0111B
0011_0110B
1011_0101B
1111_0101B
0000_0111B
1111_0111B
0011_0111B
;Address included the data
;to be displayed.
;LOAD FONT DATA
;Set RPR = 1 to access LCD
;Set Page 1
;LOWER 4 BITS OF ACC. seg0
;UPPER 4 BITS OF ACC. seg1
;Set Page = 0
; “0”
; “1”
; “2”
; “3”
; “4”
; “5”
; “6”
; “7”
; “8”
; “9”
LCD Waveform
The LCD duty can be selected by LCR register. The kinds
of LCD waveforms are four totally. Among them, static
and 1/4 duty waveforms are shown Figure 19-8.
1/4 Duty, 1/3 Bias Drive
SEG0
SEG1
SEG0
SEG1
COM0
COM1
COM2
COM3
COM0
COM1
COM2
COM3
SEG0
SEG1
SEG0 - COM0
SEG1 - COM0
Figure 19-8 Example of LCD drive output
VCL2
VCL1
VCL0
GND
VCL2
VCL1
VCL0
GND
VCL2
VCL1
VCL0
GND
VCL2
VCL1
VCL0
GND
VCL2
VCL1
VCL0
GND
VCL2
VCL1
VCL0
GND
VCL2
VCL1
VCL0
0
-VCL0
-VCL1
-VCL2
VCL2
VCL1
VCL0
0
-VCL0
-VCL1
-VCL2
JUNE 2001 Ver 1.0
75