Rainbow-electronics MAX7360 Manual do Utilizador descarregar pdf (Página 20)

C-Interfaced Key-Switch Controller and LED

Driver/GPIOs with Integrated ESD Protection

MAX7360

20 _____________________________________________________________________________________

Table 8. Configuration Register Format (0x01)

Table 9. Debounce Register Format (0x02)

BIT

DESCRIPTION VALUE FUNCTION

DEFAULT

VALUE

D7 Sleep

(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, autowakeup, or an I

C write to this bit.

(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

C write,

autosleep, and autowakeup all can change

this bit. This bit can be read back by I

any time for current status.

(when 0x40

D4 = 0)

Key-switch operating

mode

D6 Reserved 0 — 0

D5 Interrupt

INTK cleared when FIFO is empty

INTK cleared after host read. In this mode, I

C should read the

FIFO until interrupt condition is removed or further INT may be lost.

D4 Reserved 0 — 0

Key-release

enable

0 Disable key releases

1 Enable key releases

D2 Reserved 0 — 0

Autowakeup

enable

0 Disable keypress wakeup

1 Enable keypress wakeup

Timeout

disable

C timeout enabled

C timeout disabled

D7 D6 D5 D4 D3 D2 D1 D0

PORTS ENABLE DEBOUNCE TIME

Debounce time is 9ms X X X 0 0 0 0 0

Debounce time is 10ms X X X 0 0 0 0 1

Debounce time is 11ms X X X 0 0 0 1 0

Debounce time is 12ms X X X 0 0 0 1 1

Debounce time is 37ms X X X 1 1 1 0 0

Debounce time is 38ms X X X 1 1 1 0 1

Debounce time is 39ms X X X 1 1 1 1 0

Debounce time is 40ms X X X 1 1 1 1 1

GPO ports disabled (full key-scan functionality) 0 0 0 X X X X X

GPO port 7 enabled 0 0 1 X X X X X

GPO ports 7 and 6 enabled 0 1 0 X X X X X

1 2 ... 15 16 17 18 19 20 21 22 23 24 25 ... 30 31

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