CAP1293 Datasheet, PDF (44/63 Pages) Microchip Technology – 3-Channel Capacitive Touch Sensor with Proximity

CAP1293
TABLE 5-40: STBY_AVG BIT DECODE (CONTINUED)
STBY_AVG[2:0]
2
1
0
0
0
1
0
1
1
0
1
0
1
1
1
1
Number Of Samples Taken Per
0
Measurement
1
2
0
4
1
8 (default)
0
16
1
32
0
64
1
128
Bit 3 - 2 - STBY_SAMP_TIME[1:0] - Determines the time to take a single sample for sensor inputs enabled in Standby
as shown in Table 5-41.
TABLE 5-41: STBY_SAMP_TIME BIT DECODE
STBY_SAMP_TIME[1:0]
1
0
0
0
0
1
1
0
1
1
Sampling Time
320us
640us
1.28ms (default)
2.56ms
Bits 1 - 0 - STBY_CY_TIME[2:0] - Determines the desired sensing cycle time for sensor inputs enabled during Standby,
as shown in Table 5-42. This control is also used to determine programmed cycle time in the Combo state (see Section
4.3.1.3, "Combo State Sensing Settings"). All enabled channels are sampled at the beginning of the sensing cycle. If
additional time is remaining, the device is placed into a lower power state for the remainder of the sensing cycle.
TABLE 5-42: STBY_CY_TIME BIT DECODE
STBY_CY_TIME[1:0]
1
0
0
0
0
1
1
0
1
1
Programmed Sensing Cycle Time
35ms
70ms (default)
105ms
140ms
APPLICATION NOTE: The programmed sensing cycle time (STDBY_CY_TIME[1:0] is only maintained if the actual
time to take the samples is less than the programmed cycle time. The STBY_AVG[2:0] bits
DS00001566B-page 44
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