CAP1208_15 Datasheet, PDF (57/64 Pages) Microchip Technology – 8-Channel Capacitive Touch Sensor

CAP1208
APPENDIX A: DEVICE DELTA
A.1
Delta from CAP1128 / CAP1188 to CAP1208
1. Revision ID set to 00h.
2. Pinout changed. RESET, WAKE, and ADDR_COMM pins removed. LED pins removed. SPI pins /
muxing also removed. Added GND pin as ground slug is no longer used for ground connection.
3. Reduced package size from a 20-pin 4mm x 4mm QFN to a 16-pin 3mm x 3mm QFN.
4. 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").
5. 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 5.16, "Base Count Out of Limit Register").
6. Added Power Button feature (see Section 4.5, "Power Button").
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 proximity detection gain.
10. LEDs removed.
11. SMBus address fixed at 0101_000(r/w).
12. Removed SPI communications protocol option.
13. Removed RESET pin function.
14. Removed WAKE pin function.
15. Removed ALERT pin configuration.
16. Register set changes are shown in Table A-1, "Register Delta".
TABLE A-1: REGISTER DELTA
Address
00h
Page 24
02h
Page 25
04h
20h
Page 29
26h
Page 35
Register Delta
Delta
Removed bits - Main
Control Register
Added bits - General
Status Register
Removed - LED Status
Register
Removed bit -
Configuration Register
Renamed Calibration
Activate and Status
Register and added
functionality
Removed GAIN[1:0] bits.
Added bit 4 PWR for new Power Button
feature. Added bit 5 ACAL_FAIL to
indicate analog calibration failure. Added
bit 6 BC_OUT. Removed bit 4 LED
status.
removed register
Removed bit 6 WAKE_CFG.
In addition to forcing a calibration, the
register also indicates the status of
calibration for each sensor input.
Default
00h
00h
n/a
20h
00h
 2013-2015 Microchip Technology Inc.
DS00001570C-page 57