MPR083 datasheet(11/35 Pages) FREESCALE

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MPR083

Sensors

Freescale Semiconductor

Preliminary

3.5

Touch Acquisition Sample Period Register

The Touch Acquisition Sample Period Register is used to determine the electrode scan period of the system. The I2C slave

address of the Touch Acquisition Sample Period Register is 0x06.

Figure 15. Touch Acquisition Sample Period Register

Table 5. Rotary Configuration Register Field Descriptions

Field

Description

RSE

Rotary Sounder Enable – The Rotary Sounder Enable bit controls if data is sent to

the sounder.

0 Disable – Click Feedback Off

1 Enable – Click Feedback On

ACE

Auto Calibration Enable – The Auto Calibration Enable bit enables or disables the

auto calibration function.

0 Disable

1 Enable

RRBE

Rotary Release Buffer Enable – The Rotary Release Buffer Enable bit determines

whether or not data is logged in the FIFO when the rotary transitions from a touched

to untouched state.

0 Disable – No Release Data Logged

1 Enable – Release Data Logged

RTBE

Rotary Touch Buffer Enable – The Rotary Touch Buffer Enable bit determines

whether or not data is logged in the FIFO any time a button is pressed.

0 Disable – Touches are not logged

1 Enable – Touches are logged

Rotary Enable – The Rotary Enable bit enables or disables the touch sensor. When

disabled, no touches are detected.

0 Disable – Touches not detected

1 Enable – Touches detected

543210

TASP

Reset:

000001

= Unimplemented

Table 6. Touch Acquisition Sample Register Field Description

Field

Description

7:0

TASP

Touch Acquisition Sample Period – The Touch Acquisition Sample Period Field

selects or reports the multiplication factor that is used to determine how often

electrodes are scanned. The resulting factor must be in the range 1 to 32. If the

value is outside of this range the TASP will be set to 00011111.

00000000 Encoding 0 – Sets the TASP multiplication factor to 1

00011111 Encoding 31 – Sets the TASP multiplication factor to 32.

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