MPR083

Sensors

16

Freescale Semiconductor

Preliminary

5.3

Configuration

Low Power Configuration is achieved through setting two values; the Idle Timeout Period and the Sleep Cycle Duration. This

functionality is described in the following section.

5.3.1

Low Power Configuration Register

The Low Power Configuration register is used to set both the Idle Timeout Period and Sleep Cycle Duration multiplication factors.

Figure 19. Low Power Configuration Register

7

6

543210

R

ITP

SCD

W

Reset:

0

0

000000

= Unimplemented

Table 11. Low Power Configuration Register Field Descriptions

Field

Description

7:5

ITP

Idle Timeout Period – The Idle Timeout Period selects the amount to multiply the

TASP (touch acquisition sample period) by to determine the idle interface timeout

(IIT) period of the sensor controller.

000 Encoding 0 – Disables Low Power Mode

001 Encoding 1 – Sets the ITP multiplication factor to 1

~

111 Encoding 7 – Sets the ITP multiplication factor to 7

4:0

SCD

Sleep Cycle Duration – The Sleep Cycle Duration Field selects the amount to

multiply the TASP (touch acquisition sample period) by to determine the Sleep

period of the sensor controller.

00000 Encoding 0 – Disables Low Power Mode

00001 Encoding 1 – Sets the SCD multiplication factor to 1

~

11111 Encoding 31 – Sets the SCD multiplication factor to 31