Datasheet

MAX7370
8 x 8 Key-Switch Controller and LED Driver/GPIOs
with I2C Interface and High Level of ESD Protection
24Maxim Integrated
Table 13. Key-Switch Array Size Register (0x30)
Table 14. LED Driver Enable Register (0x31)
X = Don’t care.
REGISTER DESCRIPTION
REGISTER DATA
D7 D6 D5 D4 D3 D2 D1 D0
ROWS COLUMNS
No rows are key switches 0 0 0 0
X
ROW0 is a key switch 0 0 0 1
ROW0 to ROW1 are key switches 0 0 1 0
ROW0 to ROW2 are key switches 0 0 1 1
ROW0 to ROW3 are key switches 0 1 0 0
ROW0 to ROW4 are key switches 0 1 0 1
ROW0 to ROW5 are key switches 0 1 1 0
ROW0 to ROW6 are key switches 0 1 1 1
ROW0 to ROW7 are key switches 1 X X X
No columns are key switches
X
0 0 0 0
COL0 is a key switch 0 0 0 1
COL0 to COL1 are key switches 0 0 1 0
COL0 to COL2 are key switches 0 0 1 1
COL0 to COL3 are key switches 0 1 0 0
COL0 to COL4 are key switches 0 1 0 1
COL0 to COL5 are key switches 0 1 1 0
COL0 to COL6 are key switches 0 1 1 1
COL0 to COL7 are key switches 1 X X X
Power-up default setting 1 1 1 1 1 1 1 1
REGISTER BIT DESCRIPTION VALUE FUNCTION DEFAULT VALUE
D[7:4] Reserved 0000 — 0000
D3 COL7
0 GPIO function
0
1 LED driver enable
D2 COL6
0 GPIO function
0
1 LED driver enable
D1 COL5
0 GPIO function
0
1 LED driver enable
D0 COL4
0 GPIO function
0
1 LED driver enable