DLG4137 データシートの表示（PDF） - OSRAM GmbH
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DLG4137 Datasheet PDF : 4 Pages
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Conclusion
Note that although other manufacturers’ products are used in
the examples, this application note does not imply specific
endorsement, or warranty of other manufacturer's products by
OSRAM. The interface schemes shown demonstrate the sim-
plicity of using the DLO4135/DLG4137 dot matrix Intelligent Dis-
play. Slight timing differences may be encountered for various
microprocessors, but can be resolved using similar methods as
those used when using interfacing microprocessors with various
RAMs. The techniques used in the examples were shown for
their generality. The user will undoubtedly invent other schemes
to optimize his particular system to its requirements.
Program Listing
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0000
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0000
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0003
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0006
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0009
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000C
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000F
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0015
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0017
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001A
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0029
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003F
02 00 03
12 00 24
75 B0 00
12 00 24
75 B0 07
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7F 88
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7E FF
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7D FF
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DD FE
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DE F8
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DF F2
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53 49 45 4D 45
4E 53 2A
; BY DAN WATSON
; TO DO LAMP TEST, SET 100% BRIGHTNESS
; AND WRITE ‘SIEMENS*’
; P3.0 = BLO\
; P3.1 = BL1\
; P3.2 = LT\
; P3.6 = WR\
; RO = DIGIT ADDRESS ( CHIP ENABLES – CE\ )
; R1 = DIGIT COUNTER
; R7 = R6 = R5 = WAIT REGISTERS
.ORG 00H
INIT:JMP BEGIN
BEGIN:CALL WAIT1
MOV P3,#00H
CALL WAIT1
MOV P3,#07H
NOP
NOP
MOV R0,#00H
MOV R1,#08H
MOV A,#00H
MOV DPTR,#TEXT
WRT:MOVC A,@A+DPTR
MOVX @R0,A
INC DPTR
INC R0
CLR A
DJNZ R1,WRT
GO:NOP
JMP GO
; DELAY FOR uC TO STABILIZE
; LAMP TEST
; DISPLAY LT\ FOR A WHILE
; SET ALL 8 DISPLAYS TO 100% BRT
; DIGIT 7 ADDRESS
; 8 DIGIT COUNTER
; CLEAR ACC.
; ADDRESS OF THE MESSAGE
; LOAD FIRST CHAR. INTO THE ACC.
; DIGIT ADDRESS AND DATA WRITE
; NEXT CHARACTER ADDRESS
; NEXT DIGIT (6) ADDRESS
; WRITE ALL 8 CHAR.
; MESSAGE ALWAYS ON
WAIT1:MOV R7,#88H
NOP
WAIT2:MOV R6,#FFH
NOP
WAIT3:MOV R5,#FFH
NOP
DJNZ R5,$
NOP
DJNZ R6,WAIT3
NOP
DJNZ R7,WAIT2
NOP
RET
TEXT:DB ‘SIEMENS*’
; DELAY LOOPS
.END
2000 Infineon Technologies Corp. • Optoelectronics Division • San Jose, CA
www.infineon.com/opto • 1-888-Infineon (1-888-463-4636)
OSRAM Opto Semiconductors GmbH & Co. OHG • Regensburg, Germany
www.osram-os.com • +49-941-202-7178
4
Appnote 28
May 31, 2000-13
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