CAP1114 datasheet(24/102 Pages) MICROCHIP

24 / 102 page

Multiple Channel Capacitive Touch Sensor and LED Driver

Datasheet

Revision 1.1 (02-04-11)

SMSC CAP1114

DATASHEET

2. Sleep - The device is in the Sleep state. It is monitoring a limited number of Capacitive Sensor

channels (default 2). Interrupts will still be generated based on the active channels. The device will

still respond to SMBus commands normally and can be returned to the Fully Active state by

clearing the SLEEP bit. The LED11 channel is controlled via the PWR_LED control (see

Section 6.1). All other LEDs will not be affected.

3. Deep Sleep - The device is in Deep Sleep state. It is not monitoring any Capacitive Sensor

channels or the SMBus. The LED11 channel is controlled via the PWR_LED control (see

Section 6.1). All other LEDs will be driven to their programmed non-actuated state and no PWM

operations will be done.

When the device enters the Deep Sleep state, it will release control to the ALERT pin and will

change the direction of the ALERT pin (i.e. the device will monitor the ALERT pin instead of driving

it).

The device has two methods to exit the Deep Sleep state. They are:

a. The ALERT pin is driven to its active state.

b. Any SMBus communications are directed at the device.

When the device leaves the Deep Sleep state, it automatically returns to its previously defined state

and clears the DSLEEP bit.

Note: When the device enters the Deep Sleep state, the Slider Position / Volumetric Data Register

(06h) is cleared.

4. Inactive - The device is inactive. It is not monitoring any Capacitive Sensor channels. The device

will still respond to SMBus commands normally and can be returned to Fully Active state by

clearing the DEACT bit. All LEDs will have PWM controls suspended so they should be disabled

prior to entering this state. If these LEDs are not disabled, the system will show excess current

draw from these LEDs.

The priority of power control signals is:

1. DSLEEP - when set, will override DEACT, disable all LEDs except LED11 then disable SMBus

communications.

2. DEACT - when set, will override the SLEEP controls. It will disable sensor measurement and all

LEDs.

3. SLEEP - when set, will enable Sleep state.

Table 5.1 Power States

POWER STATE

DEACT

SLEEP

DSLEEP

Fully Active

Deep Sleep waking to Fully Active

Sleep

010

Deep Sleep waking to Sleep

Inactive

100

Deep Sleep waking to Inactive

Inactive

110

Deep Sleep waking to Inactive

CAP1114 датащи(PDF) 24 Page - Microchip Technology

CAP1114 датащи(HTML) 24 Page - Microchip Technology

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

датащи скачать

ссылки URL