Datasheet
MAX6958/MAX6959
2-Wire Interfaced, 3V to 5.5V, 4-Digit,
9-Segment LED Display Drivers with Keyscan
______________________________________________________________________________________ 11
REGISTER DATA ON SEGMENTS = 1
7-SEGMENT
CHARACTER
D7–D4
D3 D2 D1 D0 a b c d e f g
0X00001111110
1X00010110000
2X00101101101
3X00111111001
4X01000110011
5X01011011011
6X01101011111
7X01111110000
8X10001111111
9X10011111011
AX10101110111
BX10110011111
CX11001001110
DX11010111101
EX11101001111
FX11111000111
Table 8. Seven-Segment Mapping Decoder for Hexadecimal Font
REGISTER DATA
REGISTER POWER-UP CONDITION
ADDRESS
CODE (HEX)
D7 D6 D5 D4 D3 D2 D1
D0
Decode mode No decode for digits 3–0 0x01 X X X X 0000
Intensity 4/64 intensity 0x02 X X 0 00100
Scan limit Display 4 digits: 0 1 2 3 0x03 X X X X X X 1 1
Configuration Shutdown enabled 0x04 X X 0 X X X
D bit
0
GPIO*
IRQ/SEG9 is a segment output
(not IRQ or logic output);
INPUT2 and INPUT1 are logic
inputs; IRQ flag is clear
0x06 1 0 0 0 0 X X 0
Display test Normal operation 0x07 X X X XXXX0
Key debounced*
No key detected as debounced 0x08 0 0 0 00000
Key pressed* No key detected as pressed 0x0C 0 0 0 00000
Digit 0 Blank digit (because not decoded) 0x20 X 0 0 00000
Digit 1 Blank digit (because not decoded) 0x21 X 0 0 00000
Digit 2 Blank digit (because not decoded) 0x22 X 0 0 00000
Digit 3 Blank digit (because not decoded) 0x23 X 0 0 00000
Segments Blank segments 0x24 0 0 0 00000
Table 9. Initial Power-Up Register Status
*MAX6959 only.