CAP1208 datasheet(62/67 Pages) MICROCHIP

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8-Channel Capacitive Touch Sensor

Datasheet

DS00001570B-page 62

 2014 Microchip Technology Inc.

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 5.17, "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

DELTA

DEFAULT

00h

Page 30

Removed bits - Main

Control Register

Removed GAIN[1:0] bits.

00h

02h

Page 31

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. Removed bit 4 LED

status.

00h

04h

Removed - LED Status

removed register

n/a

20h

Page 35

Removed bit -

Configuration Register

Removed bit 6 WAKE_CFG.

20h

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