CAP1296 datasheet(62/68 Pages) MICROCHIP

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CAP1296

DS00001569B-page 62

 2013-2015 Microchip Technology Inc.

APPENDIX A:

DEVICE DELTA

A.1

Delta from CAP1106 to CAP1296

The CAP1296 is pin- and register-compatible with the CAP1106, with the exception of the ALT_POL

bit.

1. Revision ID set to 00h.

2. Added Power Button feature (see Section 4.6, "Power Button").

3. Added ACAL_FAIL bit to flag analog calibration failures (see Section 5.2, "Status Registers") and

ACAL_FAIL_INT bit to control analog calibration failure interrupts (see Section 5.6, "Configuration

Registers").

4. Added BC_OUT bit to flag calibration failures regarding base counts out of limit (see Section 5.2,

"Status Registers") and BC_OUT_RECAL and BC_OUT_INT bit to control base count out of limit

behavior and interrupts (see Section 5.6, "Configuration Registers"). Added Base Count Out of

Limit Register to indicate which sensor inputs have base counts outside the operating range (see

Section 5.17, "Base Count Out of Limit Register").

5. New Combo state has been added which allows some sensors programmed to use the Active state

settings and other sensors programmed to use the Standby state settings to function at the same

time (see Section 4.3.1.3, "Combo State Sensing Settings").

6. Added an option for a signal guard that is overloaded with the CS2 pin. This signal guard is

configured to power a ground shield for improved signal in certain applications (see Section 4.5.1,

"Signal Guard").

7. Increased supply voltage range for 5V operation.

8. Increased operating temperature range from 0°C - 85°C to -40°C to 125°C.

9. Removed ALERT pin configuration (ALT_POL bit).

10. Register additions are shown in Table A-1, "Register Delta".

TABLE A-1:

Address

Delta

Default

00h

Page 26

Added bits - Main

Control Register

Added C_GAIN[1:0] and COMBO bits.

Changed function of GAIN[1:0] bits if

COMBO bit is set.

00h

02h

Page 28

Added bits - General

Status Register

Added bit 4 PWR for new Power Button

feature. Added bit 5 ACAL_FAIL to

indicate analog calibration failure. Added

bit 6 BC_OUT.

00h

26h

Page 37

Renamed Calibration

Activate and Status

functionality

In addition to forcing a calibration, the

calibration for each sensor input.

00h

29h

Page 39

New - Signal Guard

Enable Register

new register for Signal Guard feature

00h

2Eh

Page 42

New - Base Count Out

of Limit Register

new register for calibration status

00h

44h

Page 31

Added and removed

bits - Configuration 2

Added bit 1 ACAL_FAIL_INT. Added bit 4

BC_OUT_INT. Changed bit 6 from

ALT_POL to BC_OUT_RECAL.

40h

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