DOCUMENT NO. REV.NO PAGE
00 8/20
Table-8 Register Selection
M68 i80
RS
R/W /RD /WR
Operation
0 0 1 0 IR write as an internal operation (display clear, ect.)
0 1 0 1 Read busy flag (DB7) and address counter (DB0 to DB6)
1 0 1 0 DR write as an internal operation (DR to DD-RAM or CG-RAM)
1 1 0 1 DR read as an internal operation (DD-RAM or CG-RAM to DR)
5.1.1 Busy Flag (BF)
When the busy flag is 1,
the controller is in the internal operation mode, and the next instruction will
not be accepted. When RS =0 and R/W=1 (Table-8), the busy flag is output to DB7.
The next instruction must be written after ensuring that the busy flag is 0.
5.1.2 Address Counter (ACC)
The address counter (ACC) assig
ns addresses to both DD-RAM and CG-RAM. When an address of an
instruction is written into the IR, the address information is sent from the IR to the ACC. Selection of
either DD-RAM or CG-RAM is also determined concurrently by the instruction. After writing into
(reading from) DD-RAM or CG-RAM, the ACC is automatically incremented by 1 (decremented by
1). The ACC contents are then output to Db0 to Db6 when RS =0 and R/W=1 (See Table-8).
5.1.3 Display Data RAM (DD-RAM)
Display data RAM (DD-RAM) stores display data represented in 8-bit character codes.
The area in DD-RAM that is not used for display can be used as general data RAM.
See Table-9 for the relationships between DD-RAM addresses and positions on the VFD
Table-9 Relation between Digit Position and DD-RAM data
Left End 2
nd
Column 3
rd
column - - - - - - - - - - - 15
th
Column Right End
1st
Row 00H 01H 02H - - - - - - - - -- - - 0EH 0FH
2nd
Row 40H 41H 42H 4EH 4FH
5.1.4 Character Generator ROM (CG-ROM)
The character generator ROM (CG-ROM) generates
character patterns of 5x8 dots from 8-bit character
codes (table-10). It can generate 240 kinds of 5x8 dot character patterns.
The character fonts are shown on the following pa
ge. The character codes 00H to 0FH are allocated to
the CG-RAM.
5.1.5 Character Generator RAM (CG-RAM)
In the character generator RAM (CG-RAM), the user can
rewrite character patterns by program.
For 5
8 dots and cursor, eight character patterns can be
written. Write into DD-RAM the character codes at the
addresses shown as the left column of Table-10 to show
the character patterns stored in CG-RAM.
See Table-11 for the relationship between CG-RAM
addresses and data and display patterns and refer to
Fig-10 for dot assignment of VFD.
Areas that are not used for display can be used as general data RAM
1 2 3 4 5
6 7 8 9 10
11 12 13 14 15
16 17 18 19 20
21 22 23 24 25
26 27 28 29 30
31 32 33 34 35
36 37 38 39 40
发布紧急采购，3分钟左右您将得到回复。
相关PDF资料
M0240SD-402MDAR1-3
MODULE VF CHAR 2X40 5.34MM
M0420SD-204MDAR1-C
MODULE VF CHAR 4X20 4.87MM
M0420SD-204SDAR1-3
MODULE VF CHAR 4X20 4.84MM
M1MA142WAT1G
DIODE SW DUAL SS CA 80V SOT-323
M1MA142WKT1G
DIODE SW DUAL SS CC 80V SOT-323
M1MA152WAT1
DIODE SWITCH DUAL CA 80V SC59
M1MA152WKT1G
DIODE SWITCH DUAL CA 80V SC59
M2256PW
DISPLAY SCREEN 22" MULTI-TOUCH
相关代理商/技术参数
M0224-SS-0
制造商:RAF Electronic Hardware 功能描述:
M0225YH450
制造商:n/a 功能描述:Power Semiconductor
M0240SD-402MDAR1-3
功能描述:真空荧光显示器 - VFD DIM=182.0x33.5x17.6 5 x 8 Dot RoHS:否 制造商:Noritake 产品:Graphic Display Modules 字符计数 x 行: 模块大小 - 宽x高x厚:230 mm x 78 mm x 15 mm 观察区域 - 宽x高:166.25 mm x 41.45 mm 接口: 电压额定值:5 V 工作温度范围:- 40 C to + 85 C 封装:
M024214-00A
制造商:Teac 功能描述:ADPTR;SLIM;40PIN;IDE ADAP ROHS 制造商:Teac 功能描述:MISSING COMPUTER PARTS - Bulk
M024R7JT631
制造商:KOA Speer Electronics Inc 功能描述:
M025108TKSS
制造商:n/a 功能描述:Ships in 2 days
M02510MPFSS
制造商:n/a 功能描述:Ships in 2 days
M02510MPFZ
制造商:n/a 功能描述:Ships in 2 days