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MAX6956 Datasheet

  • MAX6956

  • " 2-Wire-Interfaced, 2.5V to 5.5V, 20-Port or 28-Port LED Di...

  • 407.32KB

  • Maxim   Maxim

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2-Wire-Interfaced, 2.5V to 5.5V, 20-Port or
28-Port LED Display Driver and I/O Expander
MAX6956
Table 6. Power-Up Configuration
REGISTER
FUNCTION
Port Register
Bits 4 to 31
Global
Current
Configuration
Register
Input Mask
Register
Display Test
Port
Configuration
Port
Configuration
Port
Configuration
Port
Configuration
Port
Configuration
Port
Configuration
Port
Configuration
Current054
Current076
Current098
Current0BA
Current0DC
Current0FE
Current110
Current132
Current154
Current176
Current198
Current1BA
Current1DC
Current1FE
POWER-UP CONDITION
ADDRESS
CODE
(HEX)
0x24 to
0x3F
0x02
REGISTER DATA
D7
X
X
D6
X
X
D5
X
X
D4
X
X
D3
X
0
D2
X
0
D1
X
0
D0
0
0
LED Off; GPIO Output Low
1/16 (minimum on)
Shutdown Enabled
Current Control = Global
Transition Detection Disabled
All Clear (Masked Off)
Normal Operation
P7, P6, P5, P4: GPIO Inputs Without Pullup
P11, P10, P9, P8: GPIO Inputs Without Pullup
P15, P14, P13, P12: GPIO Inputs Without Pullup
P19, P18, P17, P16: GPIO Inputs Without Pullup
P23, P22, P21, P20: GPIO Inputs Without Pullup
P27, P26, P25, P24: GPIO Inputs Without Pullup
P31, P30, P29, P28: GPIO Inputs Without Pullup
1/16 (minimum on)
1/16 (minimum on)
1/16 (minimum on)
1/16 (minimum on)
1/16 (minimum on)
1/16 (minimum on)
1/16 (minimum on)
1/16 (minimum on)
1/16 (minimum on)
1/16 (minimum on)
1/16 (minimum on)
1/16 (minimum on)
1/16 (minimum on)
1/16 (minimum on)
0x04
0
0
X
X
X
X
X
0
0x06
0x07
0x09
0x0A
0x0B
0x0C
0x0D
0x0E
0x0F
0x12
0x13
0x14
0x15
0x16
0x17
0x18
0x19
0x1A
0x1B
0x1C
0x1D
0x1E
0x1F
X
X
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
X
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
X
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
X
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
X
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
X
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
X
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
X = unused bits; if read, zero results.
______________________________________________________________________________________
15

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