Multiple Channel Capacitive Touch Sensor and LED Driver
Datasheet
‘1’ The lid closure circuitry is enabled. The device will use the Lid Closure Status registers in
combination with the Lid Closure Pattern register settings to determine when a Lid Closure Event
is flagged. In addition, the Noise Status bits are associated with lid closure.
Bit 1 - COMP_PTRN - Determines how the Lid Closure Status registers are compared against the Lid
Closure Pattern registers. See Section 5.26, "Lid Closure Pattern Registers" for details on how the Lid
Closure Pattern registers are used.
‘0’ (default) - The Lid Closure Status registers are not compared directly against the Lid Closure
Pattern registers. Instead, the number of bits in the Lid Closure Status registers is compared to the
number of bits in the Lid Closure Pattern registers to determine whether a Lid Closure Event is
flagged.
‘1’ - The Lid Closure Status registers are compared directly against the Lid Closure Pattern
registers. If the bits set in the Lid Closure Pattern are also set in the Lid Status registers, then a
Lid Closure Event is flagged.
Bit 0 - LID_ALRT - Enables an interrupt if a Lid Closure Event occurs.
‘0’ (default) - If a Lid Closure Event occurs, the ALERT pin is not asserted.
‘1’ - If a Lid Closure Event occurs, the ALERT pin will be asserted.
5.25 Lid Closure Queue Control Register
Table 5.35 Lid Closure Queue Control Register
ADDR
R/W
REGISTER
B7
B6
B5
B4
B3
B2
B1
B0
DEFAULT
Lid Closure
Queue Control
2Ch
R/W
-
-
-
-
-
QUEUE_L_B[2:0]
02h
The Lid Closure Queue Control register determines the number of consecutive samples for which a
single sensor output is above the Lid Closure Threshold before it is flagged.
A value of 0000b is decoded as 1.
Bits 2 - 0 - QUEUE_B[2:0] - The number of consecutive samples from an individual sensor necessary
to set the Lid Closure status bit associated with the sensor. The queue applies individually to all
sensors (including both buttons and grouped sensors) and applies to setting and clearing the
respective status bit. Default is 2 consecutive samples.
5.26 Lid Closure Pattern Registers
Table 5.36 Lid Closure Pattern Registers
ADDR
R/W
REGISTER
B7
B6
B5
B4
B3
B2
B1
B0
DEFAULT
Lid Closure
Pattern 1
2Dh
R/W
-
S7_LM
S6_LM
S5_LM
S4_LM
S3_LM
S2_LM S1_LM
7Fh
Lid Closure
Pattern 2
2Eh
R/W
S14_LM S13_LM S12_LM
S11_LM S10_LM S9_LM S8_LM
7Fh
The Lid Closure Pattern registers act as a pattern to identify an expected sensor profile that is
consistent with lid closure. They are only used when lid closure is enabled (see Section 5.24, "Lid
Closure Configuration Register"). There are two methods for how the Lid Closure Status Registers are
used with the Lid Closure Pattern registers: as specific sensors that must exceed the lid closure
threshold or as the number of sensors that must exceed the lid closure threshold. Which method is
SMSC CAP1014
Revision 1.65 (08-11-09)
DATA5S3HEET
SMSC [ SMSC CORPORATION ]
