MAX6955 Maxim, MAX6955 Datasheet - Page 31

• Manufacturer Part Number: MAX6955
• Description: 2-Wire Interfaced / 2.7V to 5.5V LED Display Driver with I/O Expander and Key Scan
• Manufacturer: Maxim

Table 35. Key Debounced Register Format (Read Only)
Table 36. Key Pressed Register Format (Read Only)
Table 37. Display Test Register
Normal Operation
Display Test
DEBOUNCED
REGISTER
Debounced
Debounced
Debounced
Debounced
REGISTER
PRESSED
Register
Register
Register
Register
Register
Register
Register
Register
Pressed
Pressed
Pressed
Pressed
Key_A
Key_B
Key_C
Key_D
Key_A
Key_B
Key_C
Key_D
KEY
KEY
MODE
2-Wire Interfaced, 2.7V to 5.5V LED Display
ADDRESS
ADDRESS
______________________________________________________________________________________
CODE
CODE
(HEX)
0x0A
0x0B
(HEX
0x0C
0x0D
0x08
0x09
0x0E
0x0F
ADDRESS
Driver with I/O Expander and Key Scan
CODE
(HEX)
0x07
0x07
SW_C7
SW_D7
SW_A7
SW_B7
SW_C7
SW_D7
SW_A7
SW_B7
D7
D7
D7
X
X
SW_A6
SW_B6
SW_C6
SW_D6
SW_A6
SW_B6
SW_C6
SW_D6
D6
D6
D6
X
X
SW_C5
SW_D5
SW_A5
SW_B5
SW_A5
SW_B5
SW_C5
SW_D5
D5
D5
D5
X
X
SW_A4
SW_B4
SW_C4
SW_D4
SW_A4
SW_B4
SW_C4
SW_D4
REGISTER DATA
REGISTER DATA
D4
D4
REGISTER DATA
D4
X
X
SW_C3
SW_D3
SW_A3
SW_B3
SW_A3
SW_B3
SW_C3
SW_D3
D3
D3
D3
X
X
SW_A2
SW_B2
SW_C2
SW_D2
SW_C2
SW_D2
SW_A2
SW_B2
D2
D2
D2
X
X
SW_A1
SW_B1
SW_C1
SW_D1
SW_A1
SW_B1
SW_C1
SW_D1
D1
D1
D1
X
X
SW_C0
SW_D0
SW_C0
SW_D0
SW_A0
SW_B0
SW_A0
SW_B0
D0
D0
D0
0
1
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