8 Channel Capacitive Touch Sensor with 2 LED Drivers
Datasheet
Normal –
untouched
operation
Release
Detected
Touch
Detected
Normal –
untouched
operation
(100% - Min Duty Cycle) *
Brightness
LED
Brightness
(100% - Max Duty
Cycle) * Brightness
RISE_RATE
Setting (tRISE
)
Off Delay
(tOFF_DLY
FALL_RATE
Setting (tFALL
)
)
Figure 5.7 Direct Behavior for Non-Inverted Polarity
Release
Detected
Touch
Detected
Max Duty Cycle * Brightness
LED
Brightness
Normal –
untouched
operation
Min Duty Cycle * Brightness
RISE_RATE
Normal –
untouched
operation
Setting (tRISE
)
Off Delay
(tOFF_DLY
FALL_RATE
Setting (tFALL
)
)
Figure 5.8 Direct Behavior for Inverted Polarity
Table 5.65 Off Delay Decode
OFF DELAY[3:0] BIT DECODE
3
2
1
0
OFF DELAY (TOFF_DLY)
0
0
0
0
0
0
0
0
1
0
0
0
0
1
1
1
1
0
0
0
1
1
0
0
1
1
0
0
1
0
1
0
1
0
1
0
0
250ms
500ms
750ms
1s
1.25s
1.5s
2s
2.5s
SMSC CAP1128
Revision 1.32 (01-05-12)
DATA7S9HEET
SMSC [ SMSC CORPORATION ]
