CAP1214 Datasheet, PDF (72/107 Pages) SMSC Corporation – Multiple Channel Capacitive Touch Sensor and LED Driver

Multiple Channel Capacitive Touch Sensor and LED Driver
Datasheet
7. All sensors will use the group max duration settings if this feature is enabled via the
MAX_DUR_EN_G bit.
8. For CS8 and CS14, interrupts will be generated in the same way as they would be for a TAP
or Press and Hold event. This means that an interrupt will be generated on a touch. If the button
is held, interrupts will be generated at the Group Repeat rate until the button is released. These
buttons do not use the INT_REL_n control and will only generate an interrupt when a touch is
detected.
9. The CS8 sensor will be the designated “DOWN” button. When a tap or Press and Hold event
is detected, it will cause the DOWN status bit to be set. The TAP and PH status bits will be set
normally.
10. The CS14 sensor will be the designated “UP” button. When a Tap or Press and Hold event is
detected, it will cause the UP status bit to be set. The TAP and PH status bits will be set
normally.
Bit 0 - INT_REL_n - Controls the interrupt behavior when a release is detected on a button.
„ ‘0’ (default) - An interrupt is generated when a press is detected and again when a release is
detected and at the repeat rate (if enabled - see Section 6.14 and Section 6.33).
„ ‘1’ - An interrupt is generated when a press is detected and at the repeat rate (if enabled - see
Section 6.14 and Section 6.33).
6.34 Grouped Sensor Channel Enable Register
ADDR
41h
Table 6.51 Grouped Sensor Channel Enable Register
R/W
REGISTER
B7
B6
B5
B4
B3
B2
B1
B0 DEFAULT
R/W
Grouped Sensor
Channel Enable
-
CS14_ CS13_ CS12_ CS11_ CS10_ CS9_ CS8_
EN
EN
EN
EN
EN
EN
EN
7Fh
The Grouped Sensor Channel Enable Register enables sensors within Grouped Sensors to be
sampled during the polling cycle. This register may be updated at any time. If the grouped sensors are
treated as a group (see Section 6.33), then disabling one or more sensors will cause the slider to
behave erratically or not at all.
Bit 6 - CS14_EN - Enables the CS14 sensor to be sampled in the polling cycle.
Bit 5 - CS13_EN - Enables the CS13 sensor to be sampled in the polling cycle.
Bit 4 - CS12_EN - Enables the CS12 sensor to be sampled in the polling cycle.
Bit 3 - CS11_EN - Enables the CS11 sensor to be sampled in the polling cycle.
Bit 2 - CS10_EN - Enables the CS10 sensor to be sampled in the polling cycle.
Bit 1 - CS9_EN - Enables the CS9 sensor to be sampled in the polling cycle.
Bit 0 - CS8_EN - Enables the CS8 sensor to be sampled in the polling cycle.
Revision 1.0 (08-30-10)
72
DATASHEET
SMSC CAP1214