MAX7360 Maxim, MAX7360 Datasheet - Page 20

• Manufacturer Part Number: MAX7360
• Description: The MAX7360 I²C-interfaced peripheral provides microprocessors with management of up to 64 key switches, with an additional eight LED drivers/GPIOs that feature constant-current, PWM intensity control, and rotary switch control options
• Manufacturer: Maxim

I
Driver/GPIOs with Integrated ESD Protection
Table 8. Configuration Register Format (0x01)
Table 9. Debounce Register Format (0x02)
20
Debounce time is 9ms
Debounce time is 10ms
Debounce time is 11ms
Debounce time is 12ms
Debounce time is 37ms
Debounce time is 38ms
Debounce time is 39ms
Debounce time is 40ms
GPO ports disabled (full key-scan functionality)
GPO port 7 enabled
GPO ports 7 and 6 enabled
REGISTER
2
C-Interfaced Key-Switch Controller and LED
_____________________________________________________________________________________
BIT
D7
D6
D5
D4
D3
D2
D0
D1
REGISTER DESCRIPTION
DESCRIPTION
Autowakeup
Key-release
Reserved
Reserved
Reserved
Interrupt
Timeout
disable
enable
enable
Sleep
(when 0x40
(when 0x40
(when 0x40
D4 = 1)
D4 = 0)
D4 = 0)
VALUE
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, autowakeup, or an I
Key-switch sleep
mode. The entire
chip is shut down.
Key-switch operating
mode
—
INTK cleared when FIFO is empty
INTK cleared after host read. In this mode, I
FIFO until interrupt condition is removed or further INT may be lost.
—
Disable key releases
Enable key releases
—
Disable keypress wakeup
Enable keypress wakeup
I
I
2
2
C timeout enabled
C timeout disabled
D7
X
X
X
X
X
X
X
X
0
0
0
PORTS ENABLE
D6
X
X
X
X
X
X
X
X
0
0
1
.
.
.
When constant-current PWM is disabled
(bit 4 of register 0x40 is low), I
autosleep, and autowakeup all can change
this bit. This bit can be read back by I
any time for current status.
D5
X
X
X
X
X
X
X
X
0
1
0
FUNCTION
REGISTER DATA
D4
0
0
0
0
1
X
X
X
1
1
1
2
C should read the
D3
0
0
0
0
1
1
1
1
X
X
X
DEBOUNCE TIME
2
C write to this bit.
2
D2
C write,
0
0
0
0
1
1
1
1
X
X
X
2
C
D1
X
X
X
0
0
1
1
0
0
1
1
DEFAULT
VALUE
0
0
0
0
1
0
1
0
D0
0
1
0
1
0
1
0
1
X
X
X