MAX7365 Maxim, MAX7365 Datasheet - Page 21

• Manufacturer Part Number: MAX7365
• Description: The MAX7365 is an I²C-interfaced peripheral that provides microprocessors with management of up to 56 key switches
• Manufacturer: Maxim

Table 12. Key-Switch Array Size Register (0x30)
X = Don’t care.
Table 13. GPIO Direction Register (0x31)
No rows are key switches
ROW0 is a key switch
ROW0 to ROW1 are key switches
ROW0 to ROW2 are key switches
ROW0 to ROW3 are key switches
ROW0 to ROW4 are key switches
ROW0 to ROW5 are key switches
ROW0 to ROW6 are key switches
ROW0 to ROW7 are key switches
No columns are key switches
COL0 is a key switch
COL0 to COL1 are key switches
COL0 to COL2 are key switches
COL0 to COL3 are key switches
COL0 to COL4 are key switches
COL0 to COL5 are key switches
COL0 to COL6 are key switches
Power-up default setting
REGISTER BIT
D[7:5]
D4
D3
D2
D1
D0
REGISTER DESCRIPTION
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DESCRIPTION
Reserved
GPIO4
GPIO3
GPIO2
GPIO1
GPIO0
Key-Switch Controller with GPIO Ports
VALUE
000
0
1
0
1
0
1
0
1
0
1
D7
0
0
0
0
0
0
0
0
1
1
—
Set as input pin
Set as output pin
Set as input pin
Set as output pin
Set as input pin
Set as output pin
Set as input pin
Set as output pin
Set as input pin
Set as output pin
1MHz I
D6
X
0
0
0
0
1
1
1
1
1
ROWS
X
FUNCTION
D5
X
0
0
1
1
0
0
1
1
1
2
C-Interfaced 8 x 7
REGISTER DATA
D4
0
1
0
1
0
1
0
1
X
1
D3
0
0
0
0
0
0
0
0
0
D2
MAX7365
COLUMNS
0
0
0
0
1
1
1
1
1
DEFAULT VALUE
X
D1
0
0
1
1
0
0
1
1
1
000
0
0
0
0
0
D0
0
1
0
1
0
1
0
1
1