MAX6955_15 Datasheet, PDF (27/40 Pages) Maxim Integrated Products – 2-Wire Interfaced, 2.7V to 5.5V LED Display Driver with I/O Expander and Key Scan

MAX6955
2-Wire Interfaced, 2.7V to 5.5V
LED Display Driver with I/O
Expander and Key Scan
Table 24. Global Intensity (I Data Bit D6) Format
MODE
Intensity for all digits is controlled by one setting in the global intensity register.
REGISTER DATA
D7 D6 D5 D4 D3 D2 D1 D0
P0RTEBX S
Intensity for digits is controlled by the individual settings in the intensity10 and
intensity76 registers.
P1RTEBX S
Table 25. Blink Phase Readback (P Data Bit D7) Format
MODE
P1 Blink Phase
P0 Blink Phase
D7
D6
D5
0
I
R
1
I
R
Table 26. Scan-Limit Register Format
SCAN
LIMIT
ADDRESS CODE
(HEX)
D7 D6
Display Digit 0 only
0x03
X
X
Display Digits 0 and 1
0x03
X
X
Display Digits 0 1 2
0x03
X
X
Display Digits 0 1 2 3
0x03
X
X
Display Digits 0 1 2 3 4
0x03
X
X
Display Digits 0 1 2 3 4 5
0x03
X
X
Display Digits 0 1 2 3 4 5 6
0x03
X
X
Display Digits 0 1 2 3 4 5 6 7
0x03
X
X
Table 27. Global Intensity Register Format
REGISTER DATA
D4
D3
D2
D1
T
E
B
X
T
E
B
X
REGISTER DATA
D5 D4 D3 D2 D1 D0
X
X
X
0
0
0
X
X
X
0
0
1
X
X
X
0
1
0
X
X
X
0
1
1
X
X
X
1
0
0
X
X
X
1
0
1
X
X
X
1
1
0
X
X
X
1
1
1
D0
S
S
HEX
CODE
0x00
0x01
0x02
0x03
0x04
0x05
0x06
0x07
DUTY
CYCLE
TYPICAL
SEGMENT
CURRENT (mA)
ADDRESS
CODE (HEX)
D7
D6
REGISTER DATA
HEX
D5
D4 D3
D2 D1
D0
CODE
1/16 (min on)
2.5
2/16
5
3/16
7.5
4/16
10
5/16
12.5
6/16
15
7/16
17.5
8/16
20
9/16
22.5
10/16
25
11/16
27.5
12/16
30
13/16
32.5
14/16
35
15/16
37.5
15/16 (max on)
37.5
0x02
0x02
0x02
0x02
0x02
0x02
0x02
0x02
0x02
0x02
0x02
0x02
0x02
0x02
0x02
0x02
X
X
X
X
0
0
0
0
0xX0
X
X
X
X
0
0
0
1
0xX1
X
X
X
X
0
0
1
0
0xX2
X
X
X
X
0
0
1
1
0xX3
X
X
X
X
0
1
0
0
0xX4
X
X
X
X
0
1
0
1
0xX5
X
X
X
X
0
1
1
0
0xX6
X
X
X
X
0
1
1
1
0xX7
X
X
X
X
1
0
0
0
0xX8
X
X
X
X
1
0
0
1
0xX9
X
X
X
X
1
0
1
0
0xXA
X
X
X
X
1
0
1
1
0xXB
X
X
X
X
1
1
0
0
0xXC
X
X
X
X
1
1
0
1
0xXD
X
X
X
X
1
1
1
0
0xXE
X
X
X
X
1
1
1
1
0xXF
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