MAX6850 Ver la hoja de datos (PDF) - Maxim Integrated

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MAX6850

4-Wire Interfaced, 7-, 14-, and 16-Segment Alphanumeric Vacuum-Fluorescent Display Controller

Maxim Integrated 

4-Wire Interfaced, 7-, 14-, and 16-Segment Alpha-

numeric Vacuum-Fluorescent Display Controller

Table 4. Character and Annunciator Register Address Map in 48/1 Mode

REGISTER

Digit 0 character

Digit 1 character

Digit 2 character

UP TO

Digit 45 character

Digit 46 character

Digit 47 character

Digit 0 annunciators

Digit 1 annunciators

Digit 2 annunciators

UP TO

Digit 45 annunciators

Digit 46 annunciators

Digit 47 annunciators

COMMAND ADDRESS

D15

D14

D13

D12

D11

D10

D9

D8

R/W

0

1

0

0

0

0

0

R/W

0

1

0

0

0

0

1

R/W

0

1

0

0

0

1

0

—

—

—

—

—

—

—

—

R/W

1

0

0

1

1

0

1

R/W

1

0

0

1

1

1

0

R/W

1

0

0

1

1

1

1

R/W

1

0

1

0

0

0

0

R/W

1

0

1

0

0

0

1

R/W

1

0

1

0

0

1

0

—

—

—

—

—

—

—

—

R/W

1

1

1

1

1

0

1

R/W

1

1

1

1

1

1

0

R/W

1

1

1

1

1

1

1

HEX

CODE

0x20

0x21

0x22

—

0x4D

0x4E

0x4F

0x50

0x51

0x52

—

0x7D

0x7E

0x7F

Table 5. Character Register Address Map in 96/2 Mode

REGISTER

Digit 0 character, 1st row

Digit 1 character, 1st row

Digit 2 character, 1st row

UP TO

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

UP TO

Digit 45 character, 2nd row

Digit 46 character, 2nd row

Digit 47 character, 2nd row

COMMAND ADDRESS

HEX CODE

D15

D14 D13 D12

D11 D10 D9 D8

R/W

0

1

0

0

0

0

0

0x20

R/W

0

1

0

0

0

0

1

0x21

R/W

0

1

0

0

0

1

0

0x22

R/W

—

—

—

—

—

—

—

—

R/W

1

0

0

1

1

0

1

0x4D

R/W

1

0

0

1

1

1

0

0x4E

R/W

1

0

0

1

1

1

1

0x4F

R/W

1

0

1

0

0

0

0

0x50

R/W

1

0

1

0

0

0

1

0x51

R/W

1

0

1

0

0

1

0

0x52

R/W

—

—

—

—

—

—

—

—

R/W

1

1

1

1

1

0

1

0x7D

R/W

1

1

1

1

1

1

0

0x7E

R/W

1

1

1

1

1

1

1

0x7F

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

48 entries of 7-bit data, two entries per character, and

are stored in the MAX6850’s internal RAM.

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