Table 9. initial power-up register status – Rainbow Electronics MAX6959 User Manual
Page 11
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
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 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
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
Table 9. Initial Power-Up Register Status
*MAX6959 only.