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.
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