mk712 Integrated Device Technology, mk712 Datasheet - Page 5

• Manufacturer Part Number: mk712
• Description: Touch Screen Controller
• Manufacturer: Integrated Device Technology

Rate Register (Register 7) Programming
Calculating Points Per Second
Power-On Reset
Initializing the MK712
IDT™ / ICS™ TOUCH SCREEN CONTROLLER
MK712
TOUCH SCREEN CONTROLLER
The formula for determining P.P.S. is:
On application of power, an internal reset is generated that clears all bits in registers 0, 1, and 6. Register 7 is set to
32 giving a rate of 86 PPS. Note that clearing register 6 puts the IC into the power down condition.
The interrupt on the MK712 can only be cleared by reading a register or by writing register 6 to the power down
condition. After a fault condition, initialize the MK712 by writing register 6 to zero and then writing register 6 to the
desired value. This will always clear pending interrupts.
5
TOUCH SCREEN CONTROL
MK712
REV L 070805