CAP1214 Datasheet, PDF (60/107 Pages) SMSC Corporation – Multiple Channel Capacitive Touch Sensor and LED Driver

Multiple Channel Capacitive Touch Sensor and LED Driver
Datasheet
6.22 Sleep Channel Control Register
Table 6.30 Sleep Channel Control Register
ADDR R/W
REGISTER
B7
B6
B5
B4
B3
B2
B1
B0 DEFAULT
29h
R/W
Sleep Channel GR_
S7_
S6_
S5_
S4_
S3_
S2_
S1_
Control
SLEEP SLEEP SLEEP SLEEP SLEEP SLEEP SLEEP SLEEP
00h
The Sleep Channel Control Register determines which sensors are sampled when the device is placed
into the Sleep state.
APPLICATION NOTE: If this register is updated while the device is in the Sleep state, the conversion cycle may be
extended or for the first measurement of the new Capacitive Touch Sensors. It will correct
itself on subsequent measurement cycles.
APPLICATION NOTE: If this register is updated while the device is in the Sleep state, it is recommended to force
a recalibration routine on newly activated channels.
Bit 7 - GR_SLEEP - Enables the Grouped sensors to be sampled when the device is placed into the
Sleep state.
„ ‘0’ (default) - Grouped Sensors are not sampled when the device is in the Sleep state.
„ ‘1’ - The Grouped Sensors are sampled when the device is in Sleep mode. If a tap, slide, or touch
and hold is detected, the appropriate status bit is set and an interrupt generated. Individual sensors
will be enabled via the Group Sensor Enable register.
Bit 6 - S7_SLEEP - Enables the CS7 sensor to be sampled when the device is placed into sleep mode.
„ ‘0’ (default) - The CS7 input is not sampled when the device is in the Sleep state
„ ‘1’ - The CS7 input is sampled when the device is in Sleep mode. If a touch is detected, the status
bit is set and an interrupt generated.
Bit 5 - S6_SLEEP - Enables the CS6 sensor to be sampled when the device is placed into the Sleep
state.
Bit 4 - S5_SLEEP - Enables the CS5 sensor to be sampled when the device is placed into the Sleep
state.
Bit 3 - S4_SLEEP - Enables the CS4 sensor to be sampled when the device is placed into the Sleep
state.
Bit 2 - S3_SLEEP - Enables the CS3 sensor to be sampled when the device is placed into the Sleep
state.
Bit 1 - S2_SLEEP - Enables the CS2 sensor to be sampled when the device is placed into the Sleep
state.
Bit 0 - S1_SLEEP - Enables the CS1 sensor to be sampled when the device is placed into the Sleep
state.
Revision 1.0 (08-30-10)
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DATASHEET
SMSC CAP1214