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AUX – Sensor Controller Registers

17.8.8.6 COMP Register (Offset = 5h) [reset = X]

COMP is shown in Figure 17-75 and described in Table 17-100.

Comparator Control COMPA and COMPB comparators

Figure 17-75. COMP Register

7 6 5 4 3 2 1 0

COMPA_REF_ COMPA_REF_ COMPB_TRIM COMPB_EN RESERVED COMPA_EN

RES_EN CURR_EN

R/W-X R/W-X R/W-X R/W-X R/W-X R/W-X

Table 17-100. COMP Register Field Descriptions

Bit Field Type Reset Description

7 COMPA_REF_RES_EN R/W X

Enables 400kohm resistance from COMPA reference node to

ground. Used with COMPA_REF_CURR_EN to generate voltage

reference for cap-sense.

6 COMPA_REF_CURR_EN R/W X

Enables 2uA IPTAT current from ISRC to COMPA reference node.

Requires ISRC.EN = 1. Used with COMPA_REF_RES_EN to

generate voltage reference for cap-sense.

5-3 COMPB_TRIM R/W X

COMPB voltage reference trim temperature coded:

0h = No reference division

1h = Divide reference by 2

3h = Divide reference by 3

7h = Divide reference by 4

2 COMPB_EN R/W X

Comparator B enable

1 RESERVED R/W X

Software should not rely on the value of a reserved. Writing any

other value than the reset value may result in undefined behavior.

0 COMPA_EN R/W X

COMPA enable

1305

SWCU117A–February 2015–Revised March 2015 AUX – Sensor Controller with Digital and Analog Peripherals

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