Multiple Channel Capacitive Touch Sensor and LED Driver
Datasheet
SMSC CAP1014
69
Revision 1.64 (01-15-09)
DATASHEET
Bits 2 - 0 - DIR_OFF_DLY[2:0] - Determines the turn-off delay for all LEDs that are configured to
operate in Direct Mode as shown in Table 5.62.
The Direct Mode operation is shown determined by the combination of programmed Rise Time, Fall
Time, and Off Delay as shown in Figure 5.3.
These OTP bits are incremented any time the OTP bits are changed once devices are shipped to HP.
5.42
Product ID Register
The Product ID register stores a unique 8-bit value that identifies the device.
Table 5.62 Off Delay Settings
DIR_OFF_DLY [2:0
OFF DELAY
TOFF_DLY
21
0
00
0
00
1
0.5s
01
0
1.0s
01
1
1.5s
10
0
2.0s
10
1
3.0s
11
0
4.0s
11
1
5.0s
Figure 5.3 Direct Mode Behavior
Table 5.63 Product ID Register
ADDR
R/W
REGISTER
B7
B6
B5
B4
B3
B2
B1
B0
DEFAULT
FDh
R
Product ID
00101101
2Dh
Normal – untouched operation
100% duty cycle
FALL_RATE
Setting (tFALL)
Min Duty Cycle
Touch
Detected
Release
Detected
Off Delay
(tOFF_DLY)
RISE_RATE
Setting (tRISE)
Normal – untouched operation
100% duty cycle
Max Duty Cycle
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