Samsung S3C2440A - Manual (Page 421)

S3C2440A RISC MICROPROCESSOR ADC AND TOUCH SCREEN INTERFACE
16-9
ADC CONVERSION DATA REGISTER (ADCDAT1)
Register Address R/W Description Reset Value
ADCDAT1 0x5800010 R ADC Conversion Data Register -
ADCDAT1 Bit Description Initial State
UPDOWN [15] Up or Down state of Stylus at Waiting for Interrupt Mode.
0 = Stylus down state.
1 = Stylus up state. -
AUTO_PST [14] Automatically sequencing conversion of X-Position and
Y-Position
0 = Normal ADC conversion.
1 = Sequencing measurement of X-position, Y-position. -
XY_PST [13:12] Manually measurement of X-Position or Y-Position.
00 = No operation mode
01 = X-position measurement
10 = Y-position measurement
11 = Waiting for Interrupt Mode
-
Reserved [11:10] Reserved
YPDATA [9:0] Y-Position Conversion data value
Data value : 0 ~ 3FF -
ADC TOUCH SCREEN UP-DOWN INT CHECK REGISTER (ADCUPDN)
Register Address R/W Description Reset Value
ADCUPDN 0x5800014 R/W Stylus Up or Down Interrpt status
register 0x0
ADCUPDN Bit Description Initial State
TSC_UP [1] Stylus Up Interrupt.
0 = No stylus up status.
1 = Stylus up interrupt occurred. 0
TSC_DN [0] Stylus Down Interrupt.
0 = No stylus down status.
1 = Stylus down interrupt occurred. 0