MAX6958 Maxim, MAX6958 Datasheet - Page 11

• Manufacturer Part Number: MAX6958
• Description: 2-Wire Interfaced / 3V to 5.5V / 4-Digit / 9-Segment LED Display Drivers with Keyscan
• Manufacturer: Maxim

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