MAX6850 MAXIM [Maxim Integrated Products], MAX6850 Datasheet - Page 16

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

4-Wire Interfaced, 7-, 14-, and 16-Segment Alpha-
numeric Vacuum-Fluorescent Display Controller
Table 12. User-Definable Character Mapping
Table 13. Setting a Font Character to RAM
Table 14. Cursor Register Format
16
Cursor register.
1st row digit 0's cursor is lit continuously.
1st row digit 0's cursor is lit only for the first half of each
blink period.
2nd row digit 47's cursor is lit continuously.
2nd row digit 47's cursor is lit only for the first half of each
blink period.
No cursor is lit.
BIT/SEGMENT MAPPING FOR USER-DEFINABLE FONTS WHEN APPLIED TO 7-SEGMENT DIGITS
BIT/SEGMENT MAPPING FOR USER-DEFINABLE FONTS WHEN APPLIED TO 14-SEGMENT DIGITS
BIT/SEGMENT MAPPING FOR USER-DEFINABLE FONTS WHEN APPLIED TO 16-SEGMENT DIGITS
RAMxx byte 0
RAMxx byte 1
RAMxx byte 0
RAMxx byte 1
RAMxx byte 0
RAMxx byte 1
Set font address to minimum (zero) with data 128 or
0x80. (Note that this address is set as power-up default.)
Set font address to maximum (47 or 0x2F) with data 175
or 0xAF.
Set font address out of range (48 or 0x30) with data 176
or 0xB0 results in font address pointer being set to zero.
Set font address out of range (127 or 0x7F) with data 255
or 0xFF results in font address pointer being set to zero.
Read font address.
FONT BYTE
FONT BYTE
FONT BYTE
______________________________________________________________________________________
14-seg g2
14-seg g2
No action
7-seg a1
7-seg a
7-seg a
BIT 6
BIT 6
BIT 6
MODE
UP TO
UP TO
MODE
No action
14-seg h
14-seg h
7-seg b
7-seg b
7-seg b
BIT 5
BIT 5
BIT 5
No action
14-seg i
14-seg i
7-seg c
7-seg c
7-seg c
BIT 4
BIT 4
BIT 4
COMMAND
COMMAND
ADDRESS
ADDRESS
0x05
0x05
0x05
0x05
0x85
0x0F
0x0F
0x0F
0x0F
0x0F
0x0F
No action
7-seg d2
14-seg j
14-seg j
7-seg d
7-seg d
BIT 3
BIT 3
BIT 3
BLINK
D7
D7
X
1
1
1
1
0
0
1
0
1
D6
D6
No action
14-seg k
14-seg k
0
0
1
1
0
0
1
1
1
7-seg e
7-seg e
7-seg e
BIT 2
BIT 2
BIT 2
Font address; has value 0x00 to 0xA7
D5
D5
0
1
1
1
0
0
0
0
1
REGISTER DATA
REGISTER DATA
CURSOR POSITION
D4
D4
UP TO
UP TO
0
0
1
1
X
0
0
1
1
No action
14-seg l
14-seg l
7-seg f
7-seg f
7-seg f
BIT 1
BIT 1
BIT 1
D3
D3
X
0
1
1
1
0
0
1
1
D2
D2
X
0
1
0
1
0
0
1
1
No action
14-seg m
14-seg m
7-seg g1
7-seg g1
7-seg g
D1
D1
BIT 0
BIT 0
BIT 0
0
1
0
1
0
0
1
1
X
D0
D0
X
0
1
0
1
0
0
1
1