Rainbow-electronics MAX7359 Manual do Utilizador descarregar pdf (Página 10)

MAX7359

2-Wire Interfaced Low-EMI

Key Switch Controller/GPO

10 ______________________________________________________________________________________

Debounce Register (0x02)

The debounce register sets the time for each debounce

cycle, as well as setting whether the GPO ports are

enabled or disabled. Bits D0 through D4 set the

debounce time in increments of 1ms starting at 9ms

and ending at 40ms (Table 5). Bits D5 through D7 set

which of the GPO ports is enabled. Note the GPO ports

can be enabled only in the combinations shown in

Table 5, from all disabled to all enabled.

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

GPO ports 7, 6, and 5 enabled 0 1 1 X X X X X

GPO ports 7, 6, 5, and 4 enabled 1 0 0 X X X X X

GPO ports 7, 6, 5, 4, and 3 enabled 1 0 1 X X X X X

GPO ports 7, 6, 5, 4, 3, and 2 enabled 1 1 XXXXXX

Power-up default setting 1 1 111111

Table 5. Debounce Register Format (0x02)

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 ... 21 22

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Rainbow-electronics MAX7359 Manual do Utilizador Página 10