Multiple Channel Capacitive Touch Sensor and LED Driver
Datasheet
Table 5.1 Register Set in Hexadecimal Order (continued)
REGISTER
ADDRESS
DEFAULT
VALUE
R/W
REGISTER NAME
FUNCTION
PAGE
Determines the min and max duty
cycle for Direct mode LED
operation
LED Direct Duty
Cycle
93h
R/W
F0h
Page 73
LED Direct Ramp
Rates
Determines the rising and falling
edge ramp rates of the LED
94h
95h
FDh
FFh
R/W
R/W
R
00h
00h
2Dh
81h
Page 74
Page 75
Page 77
Page 77
Determines the off delay for all
LED behaviors
LED Off Delay
Product ID
Revision
Stores a fixed value that identifies
each product
Stores a fixed value that
represents the revision number
R
During Power-On-Reset (POR), the default values are stored in the registers. A POR is initiated when
power is first applied to the part and the voltage on the VDD supply surpasses the POR level as
specified in the electrical characteristics. Any reads to undefined registers will return 00h. Writes to
undefined registers will not have an effect.
5.1
Main Status Control Register
Table 5.2 Main Status Control Register
ADDR
R/W
REGISTER
B7
B6
B5
B4
B3
B2
B1
B0
DEFAULT
Main Status
Control
PWR_
LED
00h
R/W
-
DEACT
SLEEP DSLEEP
-
-
INT
00h
The Main Status and Control register controls the primary power state of the device.
Bit 6 - DEACT - Deactivates all sensor scanning and LED activity.
‘0’ - (default) - Sensor scanning is active and LEDs are functional.
‘1’ - All sensor scanning is disabled and all linked LEDs are disabled (see Section 5.39). The only
way to restart scanning is to clear this bit. The status registers are automatically cleared and the
INT bit is cleared.
Bit 5 - SLEEP - Enables Sleep mode by deactivating the LED activity.
‘0’ (default) - Sensor scanning is active and LEDs are functional.
‘1’ - All LEDs are disabled (except LED11) and the Capacitive Touch Sensor scanning is limited to
the sensors set in the Sleep Channel Control register (see Section 5.22). The status registers will
not be cleared.
Bit 4 - DSLEEP - Enables the Deep Sleep mode by deactivating all functions.
‘0’ (default) - Sensor scanning is active and LEDs are functional.
‘1’ - All sensor scanning is disabled and all LEDs are disabled (except LED11). The device will
return to its previous power state when the ALERT pin is driven to its active level (see Section 4.1).
The status registers are automatically cleared and the INT bit is cleared.
Bit 1 - PWR_LED - Controls the output of LED11 based on the state of bits 5 and 4.
‘0’ (default) - The LED11 output is in the “inactive” or off state.
Revision 1.65 (08-11-09)
SMSC CAP1014
DATA3S4HEET
SMSC [ SMSC CORPORATION ]
