MAX7370 Maxim, MAX7370 Datasheet - Page 21

• Manufacturer Part Number: MAX7370
• Description: The MAX7370 I²C-interfaced peripheral provides microprocessors with management of up to 64 key switches, with optional GPIO and PWM-controlled LED drivers
• Manufacturer: Maxim

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