Multiple Channel Capacitive Touch Sensor and LED Driver
Datasheet
Table 5.71 Off Delay Settings (continued)
DIR_OFF_DLY [2:0
1
OFF DELAY
TOFF_DLY
2
0
1
1
1
1
0
1
4.0s
5.0s
The Direct Mode operation is shown determined by the combination of programmed Rise Time, Fall
Time, and Off Delay as shown in Figure 5.5 (non-inverted polarity) and Figure 5.6 (inverted polarity).
Normal –
untouched
operation
Release
Detected
Normal –
untouched
operation
Touch
Detected
(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 5.5 Direct Mode Behavior for Non-Inverted Polarity
Release
Detected
Touch
Detected
LED
Max Duty Cycle * Brightness
Brightness
Normal –
untouched
operation
Normal –
untouched
operation
Min Duty Cycle * Brightness
RISE_RATE
Setting (tRISE
)
Off Delay
(tOFF_DLY
FALL_RATE
Setting (tFALL
)
)
Figure 5.6 Direct Mode Behavior for Inverted Polarity
These OTP bits are incremented any time the OTP bits are changed once devices are shipped to HP.
Revision 1.65 (08-11-09)
SMSC CAP1014
DATA7S6HEET
SMSC [ SMSC CORPORATION ]
