Samsung S3C2440A - Manual (Page 419)

S3C2440A RISC MICROPROCESSOR ADC AND TOUCH SCREEN INTERFACE
16-7
ADC START DELAY REGISTER (ADCDLY)
Register Address R/W Description Reset Value
ADCDLY 0x5800008 R/W ADC Start or Interval Delay Register 0x00ff
ADCDLY Bit Description Initial State
DELAY [15:0] 1) Normal Conversion Mode, XY Position Mode, Auto Position Mode.
→
ADC conversion start delay value.
2) Waiting for Interrupt Mode.
When Stylus Down occurs at SLEEP MODE, generates Wake-Up
signal, having interval(several ms), for Exiting SLEEP MODE.
Note) Don’t use Zero value(0x0000)
00ff
NOTE
Before ADC conversion, Touch screen uses X-tal clock(3.68MHz). During ADC conversion GCLK( Max. 50MHz)
is used.