Datasheet

802

32142D–06/2013

ATUC64/128/256L3/4U

31.7.19 Acquired Count Register

Name:

ACOUNT

Access Type: Read-only

Offset: 0x54

Reset Value: 0x00000000

•Y: Y index

The Y index (for QMatrix method) associated with this count value.

• SPORX: Sensor pair or X index

The sensor pair index (for QTouch method) or X index (for QMatrix method) associated with this count value.

• COUNT: Count value

The signal (number of counts) acquired on the channel specified in the SPORX and Y fields.

When multiple acquired count values are read from a QTouch acquisition, the Y field will always be 0 and the SPORX value will

increase monotonically. For example, suppose a QTouch acquisition is performed using sensor pairs SP1, SP4, and SP9. The

first count read will have SPORX=1, the second read will have SPORX=4, and the third read will have SPORX=9.

When multiple acquired count values are read from a QMatrix acquisition, the SPORX value will stay the same while Y

increases monotonically through all Y values in the group. Then SPORX will increase to the next X value in the group. For

example, a QMatrix acquisition with X=2,3 and Y=4,7 would provide count values in the following order: X=2 and Y=4, then X=2

and Y=7, then X=3 and Y=4, and finally X=3 and Y=7.

31 30 29 28 27 26 25 24

23 22 21 20 19 18 17 16

SPORX

15 14 13 12 11 10 9 8

COUNT[15:8]

76543210

COUNT[7:0]