MAX6958 Datasheet, PDF (11/19 Pages) Maxim Integrated Products – 2-Wire Interfaced, 3V to 5.5V, 4-Digit, 9-Segment LED Display Drivers with Keyscan

2-Wire Interfaced, 3V to 5.5V, 4-Digit,
9-Segment LED Display Drivers with Keyscan
Table 8. Seven-Segment Mapping Decoder for Hexadecimal Font
7-SEGMENT
REGISTER DATA
ON SEGMENTS = 1
CHARACTER _{D7–D4 D3}
D2
D1
D0
a
b
c
d
e
f
g
0
X
0
0
0
0
1
1
1
1
1
1
0
1
X
0
0
0
1
0
1
1
0
0
0
0
2
X
0
0
1
0
1
1
0
1
1
0
1
3
X
0
0
1
1
1
1
1
1
0
0
1
4
X
0
1
0
0
0
1
1
0
0
1
1
5
X
0
1
0
1
1
0
1
1
0
1
1
6
X
0
1
1
0
1
0
1
1
1
1
1
7
X
0
1
1
1
1
1
1
0
0
0
0
8
X
1
0
0
0
1
1
1
1
1
1
1
9
X
1
0
0
1
1
1
1
1
0
1
1
A
X
1
0
1
0
1
1
1
0
1
1
1
B
X
1
0
1
1
0
0
1
1
1
1
1
C
X
1
1
0
0
1
0
0
1
1
1
0
D
X
1
1
0
1
0
1
1
1
1
0
1
E
X
1
1
1
0
1
0
0
1
1
1
1
F
X
1
1
1
1
1
0
0
0
1
1
1
Table 9. Initial Power-Up Register Status
REGISTER
POWER-UP CONDITION
ADDRESS
REGISTER DATA
CODE (HEX) _{D7 D6 D5 D4 D3 D2 D1 D0}
Decode mode No decode for digits 3–0
0x01
X
X
X
X
0
0
0
0
Intensity
4/64 intensity
0x02
X
X
0
0
0
1
0
0
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
X
X
X
X
0
Key debounced* No key detected as debounced
0x08
0
0
0
0
0
0
0
0
Key pressed* No key detected as pressed
0x0C
0
0
0
0
0
0
0
0
Digit 0
Blank digit (because not decoded)
0x20
X
0
0
0
0
0
0
0
Digit 1
Blank digit (because not decoded)
0x21
X
0
0
0
0
0
0
0
Digit 2
Blank digit (because not decoded)
0x22
X
0
0
0
0
0
0
0
Digit 3
Blank digit (because not decoded)
0x23
X
0
0
0
0
0
0
0
Segments
Blank segments
0x24
0
0
0
0
0
0
0
0
*MAX6959 only.
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