Table 5. debounce register format (0x02) – Rainbow Electronics MAX7359 User Manual
Page 10
MAX7359
2-Wire Interfaced Low-EMI
Key Switch Controller/GPO
10
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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.
REGISTER DATA
D7
D6
D5
D4
D3
D2
D1
D0
REGISTER DESCRIPTION
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
X
X
X
X
X
X
Power-up default setting
1
1
1
1
1
1
1
1
Table 5. Debounce Register Format (0x02)