MK712

Touch Screen Controller

MDS 712 I

3

Revision 100899

Printed 11/16/00

Integrated Circuit Systems, Inc.•525 Race St.•San Jose•CA•95126•(408)295-9800tel•www.icst.com

I C R O

IC Operation

(Periodic Conversions Enabled)

Power ON

Is

Screen

Touched?

Write D4, D5 Reg 0 And

D2, D3 Reg 1 To 1

Issue Interrupt

(If Enabled)

Store Y Co-Ordinates In

Reg 4 and Reg 5

Store X Co-Ordinates in

Reg 2 and Reg 3

Convert

Y Co-Ordinates

Convert

X Co-Ordinates

Write D7 Reg 0 To 1

Issue Interrupt

(If Enabled)

Write D4, D5 Reg 0 And

D2, D3 Reg 1 To 0

Issue Interrupt

(if Enabled)

N

Y

Is

Screen

Touched?

N

Y