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参数资料
| 型号： | MAX6850AEE-T |
| 厂商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分类： | 显示驱动器 |
| 英文描述： | 4-Wire Interfaced, 7-, 14-, and 16-Segment Alphanumeric Vacuum-Fluorescent Display Controller |
| 中文描述： | VACUUM FLUOR DISPLAY DRIVER, PDSO16 |
| 封装： | 0.150 INCH, 0.25 MM PITCH, MO-137, QSOP-16 |
| 文件页数： | 2/34页 |
| 文件大小： | 485K |
| 代理商： | MAX6850AEE-T |
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MAX6850
4-Wire Interfaced, 7-, 14-, and 16-Segment Alpha-
numeric Vacuum-Fluorescent Display Controller
10
______________________________________________________________________________________
Character Generator Font Mapping
The font comprises 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 maps (Tables 7 and 8), controls the DP segment
of the digit; it is set to light the DP.
There are two font maps stored in the MAX6850. One
font map covers 14-segment displays (Table 8), and
the other suits 16-segment displays (Table 7). The F bit
in the configuration register (Table 20) selects between
the two font maps. The F bit may be set either high or
low for 7-segment displays; 7-segment displays use a
subset of the 14- or 16-segment display described in
two font maps (Figure 7).
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
00000
User-defined font
address pointer
Address 0x80; pointing to the
first user-defined font location
0x05
1
0
00000
User-defined fonts
Predefined for hex fonts
—
See Table 11 for power-up patterns.
Output map pointer
Address 0x80; pointing to the
first entry address
0x06
1
0
00000
Output map data
Predefined for 40-digit display
—
See Table 32 for power-up patterns.
Display test
Normal operation
0x07
X
XXXX
0
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
1 output bit
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
MAPS TO
7 SEGMENT
14/16 SEGMENT
dp
a
g
d
ec
fb
a/a1
g1
d/d2
ec
fb
Figure 7. 14- and 16-Segment Fonts Map a Subset of Their 14
or 16 Segments to a 7-Segment Digit
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