AK4185-A Datasheet, PDF (10/18 Pages) Asahi Kasei Microsystems – Evaluation board

[AKD4185-A]
1. The setup of the AK4185’s register.
[Write] : Write registers that is currently displayed.
[Read] : Read registers that is currently displayed.
[Addr] 00H: Check the box, data becomes “H” or “1”. If not becomes “L” or “0”.
00H-03H: Select data from drop-down list.
* As for the AK4185’s register definitions, refer to datasheet of the AK4185.
2. 4-Wire Touch Screen position, pressure and temperature measurement.
Please set the AK4185’s register to 4-Wire Touch Screen Operation when using 4- Wire touch screen.
[START]: When select “Channel Selection” and click [START] button with pressing point by the status or
finger. The results of measurement are displayed at “AD OUT Section”. Display all data on an
assistant window. The parameter on the “Channel Selection” corresponds to A2-0 bits, MODE bit
and PD bit of the AK4185’s control command.
<Example ʵ Touch-position measurement>
a. Select “4W-X-axis” and “12 bit” from drop-down list of “1st Measurement” and “1st Mode”.
Check the box of “1st PD”.
b. Select “4W-Y-axis” and “12 bit” from drop-down list of “2nd Measurement” and “1st Mode”.
Check the box of “2nd PD”.
c. Click [START] button with touching any position on Touch Screen, then start the measurement.
d. Display MEAN, MAX, MIN and SIGMA of measurement results at “AD OUT Section”. (Left: X-axis
measurement results, Right: Y-axis measurement results) The results are displayed in decimal, and
maximum value is “4095”. Display data on assistant window. Line up X-axis data at first, next is
Y-axis.
<Example ʵ Touch-pressure measurement>
a. Select “4W-Z1” and “12 bit” from drop-down list of “1st Measurement” and “1st Mode”.
Check the box of “1st PD”.
b. Select “4W-Z2” and “12 bit” from drop-down list of “2nd Measurement” and “1st Mode”.
Check the box of “2nd PD”.
c. Click [START] button with touching any position on Touch Screen, then start the measurement.
d. Display touch-pressure measurement results at “Pressure”. Rtouch can be requested according to the
Rxplate. (Bottom: X-position and Y-position) The results are displayed in float. Display data on
assistant window. Line up Z1 data at first, next is Z2.
<Example ʵ Temperature measurement>
a. Select “4W-TEMP0” and “12 bit” from drop-down list of “1st Measurement” and “1st Mode”.
Check the box of “1st PD”.
b. Select “4W- TEMP1” and “12 bit” from drop-down list of “2nd Measurement” and “1st Mode”.
Check the box of “2nd PD”.
c. Click [START] button, then start the measurement.
d. Display temperature measurement results at “Temperature”. The results are displayed in float. Display
data on assistant window. Line up TEMP0 data at first, next is TEMP1.
3. 5-Wire Touch Screen position and temperature measurement.
Please set the AK4185’s register to 5-Wire Touch Screen Operation when using 5- Wire touch screen.
As for the measuring method of 5-Wire Touch Screen, refer to the position and the temperature measurement of
4-Wire touch screen.
* The measurement item “Reserved” is not used, Please do not select it.
<KM090700>
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2007/11