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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)： | 3/35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
______________________________________________________________________________________
11
Table 10 shows how to use the single user-defined font
register 0x05 to set the font address pointer, write font
data, and read font data. A read action always returns
font data from the font address pointer position. A write
action sets the 7-bit font address pointer if the MSB is
set, or writes 7-bit font data to the font address pointer
position if the MSB is clear.
The font address pointer autoincrements after a valid
access to the user-definable font data. Auto-
incrementing allows the 120-font data entries to be writ-
ten and read back very quickly because the font point-
er address need only be set once. After the last data
location 0xF7 has been written, further font data entries
are ignored until the font address pointer is reset. If the
font address pointer is set to an out-of-range address
by writing data in the 0xF8 to 0xFF range, then address
0x80 is set instead (Table 11).
Table 12 shows the user-definable font pointer base
addresses.
Table 13 shows an example of data (characters 0, 1,
and 2) being stored in the first three user-defined font
locations, illustrating the orientation of the data bits.
Table 14 shows the six sequential write commands
required to set a MAX6853’s font character RAM02 with
the data to display character 2 given in Table 9.
Cursor Register
The cursor register controls the behavior of the cursor
segments (Table 15). The MAX6853 controls 48 cursors
in 48/1 mode, and 96 cursors in 96/2 mode. The cursor
register selects one digit’s cursor to be lit either contin-
uously or blinking. All the other digits’ cursors are off.
The 7 least significant bits (LSBs) of the cursor register
identify the cursor position. The MSB is clear for the
cursor to be on continuously, and set for the cursor to
be lit only during the first half of each blink period.
The valid cursor position address range is contiguous:
0 to 47 (0x00 to 0x2F) for the first digit row, and 48 to
95 (0x30 to 0x5F) for the last digit row. If the cursor reg-
ister is programmed with an out-of-range value of 95 to
127 (0x60 to 0x7F), then all cursors are off.
Annunciator Registers
The annunciator registers are organized in bytes, with
each segment of each grid being represented by 2
bits. Thus, the four annunciators segments allowed for
each grid are represented by exactly 1 byte (Table 16).
Annunciators are only available in 48/1 mode. The
annunciator address map is shown in Table 4.
Configuration Register
The configuration register is used to enter and exit shut-
down, lock the key VFD configuration settings, select
the blink rate, globally clear the digit and annunciator
data, reset the blink timing, and select between 48/1
and 96/2 display modes (Table 17).
Shutdown Mode (S Data Bit D0) Format
The S bit in the configuration register selects shutdown
or normal operation (Table 18). The display driver can
be programmed while in shutdown mode, and shut-
COMMAND ADDRESS
REGISTER
D15
D14
D13
D12
D11
D10
D9
D8
HEX
CODE
Digit 0 5 x 7 matrix character
0
1
0
0x20
Digit 1 5 x 7 matrix character
0
1
0
1
0x21
Digit 2 5 x 7 matrix character
0
1
0
1
0
0x22
UP TO
—
——
—
Digit 45 5 x 7 matrix character
0
1
0
1
0
1
0x4D
Digit 46 5 x 7 matrix character
0
1
0
1
0
0x4E
Digit 47 5 x 7 matrix character
0
1
0
1
0x4F
Digit 0 annunciators
0
1
0
1
0
0x50
Digit 1 annunciators
0
1
0
1
0
1
0x51
Digit 2 annunciators
0
1
0
1
0
1
0
0x52
UP TO
—
——
—
Digit 45 annunciators
0
1
0
1
0x7D
Digit 46 annunciators
0
1
0
0x7E
Digit 47 annunciators
0
1
0x7F
Table 4. Character and Annunciator Register Address Map in 48/1 Mode
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