CAP1296 Datasheet, PDF (62/68 Pages) Microchip Technology – 6-Channel Capacitive Touch Sensor with Proximity

CAP1296
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: REGISTER DELTA
Address
00h
Page 26
02h
Page 28
26h
Page 37
29h
Page 39
2Eh
Page 42
44h
Page 31
Register Delta
Delta
Added bits - Main
Control Register
Added bits - General
Status Register
Renamed Calibration
Activate and Status
Register and added
functionality
New - Signal Guard
Enable Register
New - Base Count Out
of Limit Register
Added and removed
bits - Configuration 2
Register
Added C_GAIN[1:0] and COMBO bits.
Changed function of GAIN[1:0] bits if
COMBO bit is set.
Added bit 4 PWR for new Power Button
feature. Added bit 5 ACAL_FAIL to
indicate analog calibration failure. Added
bit 6 BC_OUT.
In addition to forcing a calibration, the
register also indicates the status of
calibration for each sensor input.
new register for Signal Guard feature
new register for calibration status
Added bit 1 ACAL_FAIL_INT. Added bit 4
BC_OUT_INT. Changed bit 6 from
ALT_POL to BC_OUT_RECAL.
Default
00h
00h
00h
00h
00h
40h
DS00001569B-page 62
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