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CAP1114-1-EZK-TR Datenblatt(PDF) 9 Page - SMSC Corporation

Teilenummer CAP1114-1-EZK-TR
Bauteilbeschribung  Multiple Channel Capacitive Touch Sensor and LED Driver
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Hersteller  SMSC [SMSC Corporation]
Direct Link  http://www.smsc.com
Logo SMSC - SMSC Corporation

CAP1114-1-EZK-TR Datenblatt(HTML) 9 Page - SMSC Corporation

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Multiple Channel Capacitive Touch Sensor and LED Driver
Datasheet
SMSC CAP1114
9
Revision 1.1 (02-04-11)
DATASHEET
Chapter 1 Delta from CAP1014 to CAP1114
1.1
Summary
1. Updated circuitry to reduce sensitivity to power supply stepping.
2. Updated LED Pulse 1 behavior. This function may be triggered on button press or on release. See
Section 6.49.
3. Updated Product ID to 3Ah.
4. Updated LED behavior for host control during direct mode when not linked. The LED Output
register will now be able to be written to emulate a touch or release. Enables all behaviors while
in host mode. See Section 6.43 and Section .
5. Updated recalibration controls to add negative delta count. See Section 6.27.
6. Removed ACAL_RT bits.
7. Added digital controls to disable the slider functionality but still detect basic touches essentially
bypassing the slider algorithms entirely. See Section 6.33.
8. Added controls to enable individual buttons in the slider. See Section 6.34.
9. Updated button interrupt schemes to allow interrupt on press only, not on release. Retained
previous behavior as default. See Figure 5.2, Figure 5.3, and Section 5.7.1. Retained previous
behavior as default. See Section 6.27.
10. Updated Noise Threshold default settings to ~25%. See Section 6.29.
11. Added control bit and status registers to enable interrupt when LEDs finish their directed behavior
in the same fashion. See Section 6.52 and Section 6.39.
12. Updated LED driver duty cycle decode values to have more distribution at lower values - closer to
a logarithmic curve. See Section 6.53.
13. Renamed D_DSP[3:0] and C_DSP[3:0] to DELTA_SENSE[2:0] and BASE_SHIFT[3:0]. D_DSP[3]
did nothing so removed references. See Section 6.13.
14. Added filtering on RESET pin to prevent errant resets. The RESET pin must be high or low for
longer than 10ms before it will be detected by the device. See Section 8.6.
15. Added proximity to CS1 channel.
16. Updated Deep Sleep to wake on communications. See Section 5.1.
17. Updated controls so that the RESET pin assertion places the device into the lowest power state
available. See Section 5.2 and Section 5.1.
18. Added LED transition controls that affect the LED behavior when a Capacitive Touch Sensor is
linked to an LED channel to remove bouncing. See Section 6.45.
19. Added controls to “mirror” the LED duty cycle outputs so that when polarity changed, the LED
brightness levels look right. See Section 6.46.
20. Added register to force digital recalibration of all sensors. See Section 6.32.
21. Added register to enable oversampling on specific sensors. See Section 6.35 and Section 6.37.
22. Changed PWM frequency for LED drivers. The PWM frequency was derived from the programmed
breathe period and duty cycle settings and it ranged from ~4Hz to ~8000 Hz. The PWM frequency
has been updated to be a fixed value of ~2000Hz.


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