MAX6957 MAXIM [Maxim Integrated Products], MAX6957 Datasheet - Page 16

• Manufacturer Part Number: MAX6957
• Description: 4-Wire-Interfaced, 2.5V to 5.5V, 20-Port and 28-Port LED Display Driver and I/O Expander
• Manufacturer: MAXIM [Maxim Integrated Products]

4-Wire-Interfaced, 2.5V to 5.5V, 20-Port and
28-Port LED Display Driver and I/O Expander
Table 5. Configuration Register Format
X = Don’t care bit.
X = Don’t care bit.
Table 7. Global Current Control (I Data Bit D6) Format
X = Don’t care bit.
X = Don’t care bit.
X = Don’t care bit.
16
Table 6. Shutdown Control (S Data Bit D0) Format
Table 9. Global Segment Current Register Format
Table 8. Transition Detection Control (M-Data Bit D7) Format
Configuration Register
LED DRIVE
FRACTION
controlled by one setting in the Global Current
individually controlled by the settings in the
Normal Operation
______________________________________________________________________________________
Current054 through Current1FE registers
1/16
2/16
3/16
4/16
5/16
Constant-current limits for all digits are
Constant-current limit for each digit is
FUNCTION
FUNCTION
FUNCTION
Shutdown
Disabled
Enabled
Individual Segment
register, 0x02
TYPICAL SEGMENT
FUNCTION
CURRENT (mA)
Global
1.5
4.5
7.5
3
6
ADDRESS CODE
ADDRESS CODE
ADDRESS CODE
(HEX)
(HEX)
(HEX)
0x04
0x04
0x04
0x04
0x04
CODE (HEX)
ADDRESS
0x02
0x02
0x02
0x02
0x02
CODE (HEX)
ADDRESS
D7
D7
M
D7
M
M
0
1
0x04
0x04
D7
X
X
X
X
X
D6
D6
D6
I
I
I
I
I
D6
X
X
X
X
X
D7
M
M
D5
D5
D5
X
X
X
X
X
D5
X
X
X
X
X
D6
0
1
REGISTER DATA
REGISTER DATA
REGISTER DATA
D4
X
X
X
X
X
D4
D4
D4
X
X
X
X
X
D5
X
X
D3
REGISTER DATA
0
0
0
0
0
D3
D3
D4
D3
X
X
X
X
X
X
X
D2
0
0
0
0
1
D3
X
X
D1
D2
D2
0
0
1
1
0
D2
X
X
X
X
X
D2
D0
X
X
0
1
0
1
0
D1
D1
D1
X
X
X
X
X
HEX CODE
D1
X
X
0xX0
0xX1
0xX2
0xX3
0xX4
D0
D0
D0
S
0
1
S
S
D0
S
S