CAP1133 datasheet(36/63 Pages) MICROCHIP

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CAP1133

DS00001625B-page 36

 2015 Microchip Technology Inc.

Bit 3-2 - STBY SAMP_TIME[1:0] - Determines the time to take a single sample when the device is in Standby as shown

in Table 6-38.

Bits 1 - 0 - STBY_CY_TIME[2:0] - Determines the overall cycle time for all measured channels during standby operation

as shown in Table 6-39. All measured channels are sampled at the beginning of the cycle time. If additional time is

remaining, the device is placed into a lower power state for the remaining duration of the cycle.

APPLICATION NOTE: The programmed cycle time is only maintained if the total averaging time for all samples is

less than the programmed cycle. The STBY_AVG[2:0] bits will take priority so that if more

samples are required than would normally be allowed during the cycle time, the cycle time

will be extended as necessary to accommodate the number of samples to be measured.

6.22

Standby Sensitivity Register

The Standby Sensitivity register controls the sensitivity for sensor inputs that are active in Standby.

8 (default)

128

TABLE 6-38:

STBY_SAMP_TIME BIT DECODE

STBY_SAMP_TIME[1:0]

Sampling Time

320us

640us

1.28ms (default)

2.56ms

TABLE 6-39:

STBY_CY_TIME BIT DECODE

STBY_CY_TIME[1:0]

Overall Cycle Time

35ms

70ms (default)

105ms

140ms

TABLE 6-40:

STANDBY SENSITIVITY REGISTER

ADDR

R/W

B5B4

B3B2

B1B0

Default

42h

R/W

Standby Sensitiv-

ity

STBY_SENSE[2:0]

02h

TABLE 6-37:

STBY_AVG BIT DECODE (CONTINUED)

STBY_AVG[2:0]

Number of Samples Taken per

Measurement

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