MK715
IC Operation
(Periodic Conversions Enabled)
N
Power ON
Is screen
touched?
Y
Write D6 Reg 0 to 1 and TOUCH# = 0
Issue Interrupt, power-up ADC and PLL
Convert Y co-ordinates
Store Y co-ordinates in Register 2
Write D7 register 0 to 1
Issue interrupt
Is screen
touched?
N
Y
Convert X co-ordinates
Store X co-ordinates in Register 2
Write D7 register 0 to 1
Issue Interrupt
Wait. Duration controlled by Rate Register
Y
Is screen
touched?
N
Write D6 Reg 0 to 0 and TOUCH# = 1
Issue Interrupt, power-down ADC and PLL
5