MAX6850 MAXIM [Maxim Integrated Products], MAX6850 Datasheet - Page 11

• Manufacturer Part Number: MAX6850
• Description: 4-Wire Interfaced, 7-, 14-, and 16-Segment Alphanumeric Vacuum-Fluorescent Display Controller
• Manufacturer: MAXIM [Maxim Integrated Products]

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.
4-Wire Interfaced, 7-, 14-, and 16-Segment Alpha-
Table 4. Character and Annunciator Register Address Map in 48/1 Mode
Table 5. Character Register Address Map in 96/2 Mode
Digit 0 character
Digit 1 character
Digit 2 character
Digit 45 character
Digit 46 character
Digit 47 character
Digit 0 annunciators
Digit 1 annunciators
Digit 2 annunciators
Digit 45 annunciators
Digit 46 annunciators
Digit 47 annunciators
Digit 0 character, 1st row
Digit 1 character, 1st row
Digit 2 character, 1st row
Digit 45 character, 1st row
Digit 46 character, 1st row
Digit 47 character, 1st row
Digit 0 character, 2nd row
Digit 1 character, 2nd row
Digit 2 character, 2nd row
Digit 45 character, 2nd row
Digit 46 character, 2nd row
Digit 47 character, 2nd row
numeric Vacuum-Fluorescent Display Controller
REGISTER
REGISTER
UP TO
UP TO
UP TO
UP TO
______________________________________________________________________________________
D15
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
D15
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
—
—
D14
D14
—
—
—
—
0
0
0
1
1
1
1
1
1
1
1
1
0
0
0
1
1
1
1
1
1
1
1
1
D13
D13
—
—
—
—
1
1
1
0
0
0
0
0
0
1
1
1
1
1
1
0
0
0
0
0
0
1
1
1
COMMAND ADDRESS
COMMAND ADDRESS
The 24 user-definable characters are represented by
48 entries of 7-bit data, two entries per character, and
are stored in the MAX6850’s internal RAM.
D12
D12
—
—
—
—
0
0
0
0
0
0
1
1
1
1
1
1
0
0
0
0
0
0
1
1
1
1
1
1
D11
D11
—
—
—
—
0
0
0
1
1
1
0
0
0
1
1
1
0
0
0
1
1
1
0
0
0
1
1
1
D10
D10
—
—
—
—
0
0
0
1
1
1
0
0
0
1
1
1
0
0
0
1
1
1
0
0
0
1
1
1
D9
D9
—
—
—
—
0
0
1
0
1
1
0
0
1
0
1
1
0
0
1
0
1
1
0
0
1
0
1
1
User-Defined Fonts
D8
D8
—
—
—
—
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
HEX CODE
CODE
0x4D
0x7D
0x4D
0x7D
0x20
0x21
0x22
0x4E
0x4F
0x50
0x51
0x52
0x7E
0x7F
0x20
0x21
0x22
0x4E
0x4F
0x50
0x51
0x52
0x7E
0x7F
HEX
—
—
—
—
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