AK4185-A Datasheet, PDF (4/18 Pages) Asahi Kasei Microsystems – Evaluation board

[AKD4185-A]
Evaluation mode
Applicable Evaluation Mode
(1) 4-Wire Touch Screen position, pressure measurement and evaluation of A/D using the analog
input terminal.
(2) 5-Wire Touch Screen position measurement.
(1-1) 4-Wire Touch Screen position and pressure measurement.
In case of evaluating a 4-Wire Touch Screen function of the AK4185, it is necessary to connect the 4-Wire
Touch Panel with J1 terminal as shown Table 2. Regarding pin assignment of J1, refer to Table 2 or circuit
diagram in this manual. As for the AK4185’s register definitions, refer to datasheet of the AK4185.
4-wire resistive touch panel should be connected to J1.
The pin assignment of J1 is shown on Table 2.
No. Name
Description
8
4W-YN 4-Wire Touch Screen Y – plate Voltage supply
7
6
4W-YP 4-Wire Touch Screen Y + plate Voltage supply
5
4
3
4W-XN 4-Wire Touch Screen X – plate Voltage supply
2
1
4W-XP 4-Wire Touch Screen X + plate Voltage supply
Table 2. J1 (8P Header) pin assign
Set up the jumper pins.
JP1
JP2
XP/BR-SEL YP/TR-SEL
JP3
JP4
XN/TL-SEL YN/BL-SEL
4W-XP
5W-BR
BNCXP
4W-YP
5W-TR
BNCYP
4W-XN
5W-TL
BNCXN
4W-YN
5W-BL
BNCYN
The AK4185’s register (Touch Screen Register) should be set to 4-Wire Touch Screen Operation.
(1-2) Evaluation of A/D using the analog input terminal.
In case of AK4185’s A/D evaluation using the analog input terminal, it is necessary to connect the analog
generator with AIN terminal. As for the AK4185’s register definitions, refer to datasheet of the AK4185.
Set up the jumper pins.
JP5
AIN-P
BNCXP
BNCYP
IN
JP7
IN/WIPER-SEL
IN
5W-WIPER
The AK4185’s register (Touch Screen Register) should be set to 4-Wire Touch Screen Operation.
<KM090700>
-4-
2007/11