Datasheet

MAX7370
8 x 8 Key-Switch Controller and LED Driver/GPIOs
with I2C Interface and High Level of ESD Protection
21Maxim Integrated
Table 8. Configuration Register (0x01)
X = Don’t care.
REGISTER
BIT
DESCRIPTION VALUE FUNCTION
DEFAULT
VALUE
D7 Sleep
X
(when 0x40
D4 = 1)
Key-switch operating mode. Key switches always remain active
when constant-current PWM is enabled (bit 4 of register 0x40 is
high), regardless of autosleep, autowake, or an I
2
C write to this bit.
0
0
(when 0x40
D4 = 0)
Key-switch sleep
mode. The entire
chip is shut down.
When constant-current PWM is disabled
(bit 4 of register 0x40 is low), I
2
C write,
autosleep, and autowake all can change
this bit. This bit can be read back by I
2
C
any time for current status.
1
(when 0x40
D4 = 0)
Key-switch operating
mode.
D6 Reserved 0 — 0
D5 Interrupt
0 INT cleared when the FIFO is empty.
0
1
INT cleared after host read. In this mode, I
2
C should read the
FIFO until interrupt condition is removed or further INT could be
lost.
D4 Reserved 0 — 0
D3
Key-release
enable
0 Disable key releases.
1
1 Enable key releases.
D2 Reserved 0 — 0
D1
Autowake
enable
0 Disable keypress wakeup.
1
1 Enable keypress wakeup.
D0
Timeout
disable
0 I
2
C timeout enabled.
1
1 I
2
C timeout disabled.