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參數(shù)資料
| 型號： | MAX6853AEE-T |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 顯示驅動器 |
| 英文描述： | 2-Wire Interfaced, 5 x 7 Matrix Vacuum-Fluorescent Display Controller |
| 中文描述： | VACUUM FLUOR DISPLAY DRIVER, PDSO16 |
| 封裝： | 0.150 INCH, 0.25 MM PITCH, MO-137, QSOP-16 |
| 文件頁數(shù)： | 2/35頁 |
| 文件大?。?/td> | 489K |
| 代理商： | MAX6853AEE-T |
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MAX6853
2-Wire Interfaced, 5
7 Matrix Vacuum-
Fluorescent Display Controller
10
______________________________________________________________________________________
Character Generator Font Mapping
The font is a 5 x 7 matrix comprising 104 characters in
ROM, and 24 user-definable characters. The selection
from the total of 128 characters is represented by the
lower 7 bits of the 8-bit digit registers. The MSB, shown
as x in the ROM map (Table 9), controls the DP seg-
ment of the digit; it is set to light the DP, cleared to
leave it unlit.
The character map follows the Arial font for 96 charac-
ters in the x0100000 through x1111111 range. The first
32 characters map the 24 user-definable positions
(RAM00 to RAM23), plus eight extra common charac-
ters in ROM.
User-Defined Fonts
The 24 user-definable characters are represented by
120 entries of 7-bit data, five entries per character, and
are stored in the MAX6853’s internal RAM.
The 120 user-definable font data entries are written and
read through a single register, address 0x05. An
autoincrementing font address pointer in the MAX6853
indirectly accesses the font data. The font address
pointer can be written, setting one of 120 addresses
between 0x00 and 0xF7, but cannot be read back. The
font data is written to and read from the MAX6853 indi-
rectly, using this font address pointer. Unused font
locations can be used as general-purpose scratch
RAM, noting that the font registers are only 7 bits wide,
not 8.
REGISTER DATA
REGISTER
POWER-UP CONDITION
COMMAND
ADDRESS
D7
D6
D5
D4
D3
D2
D1
D0
VFBLANK polarity
VFBLANK is high to disable the
display
0x01
X
0
Intensity
1/16 (min on)
0x02
X
0000
Grids
Display has 1 grid
0x03
X
0
00000
Configuration
Shutdown enabled,
configuration unlocked
0x04
1
0
X
0
User-defined font
address pointer
Address 0x80; pointing to the
first user-defined font location
0x05
1
0
00000
User-defined fonts
All 24 characters blank
—
000
00000
Output map pointer
Pointing to first entry address
0x06
1
0
00000
Output map data
Predefined for 40-digit display
—
See Table 30 for power-up patterns.
Display test
Normal operation
0x07
0
00110
PUMP
General-purpose output, logic
0x08
0
00000
Filament duty cycle
Minimum duty cycle
0x09
0
00001
PHASE1
General-purpose output, logic
0x0A
0
00000
PHASE2
General-purpose output, logic
0x0B
0
00000
PORT0
General-purpose output, logic
0x0C
0
00000
PORT1
General-purpose output, logic
0x0D
0
00001
Shift limit
2 output bits
0x0E
X
0
00001
Cursor
Off
0x0F
0
1
00000
Character and
annunciator data
Clear
0x20
0
00000
UP TO
—
UP TO
———
—————
Character and
annunciator data
Clear
0x7F
0
00000
Table 3. Initial Power-Up Register Status
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