User's Manual

S3C2450X RISC MICROPROCESSOR ADC AND TOUCH SCREEN INTERFACE
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3.5 ADC CONVERSION DATA (ADCDAT1) REGISTER
Register Address R/W Description Reset Value
ADCDAT1 0x58000010 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] Automatic sequencing conversion of X-position and
Y-position. (mirroring AUTO_PST in ADCTSC register)
0 = Normal ADC conversion
1 = Auto measurement of X-position, Y-position
-
XY_PST [13:12] Manual measurement of X-position or Y-position. (mirroring
XY_PST in ADCTSC register)
00 = No operation mode
01 = X-position measurement
10 = Y-position measurement
11 = Waiting for Interrupt Mode
-
YPDATA_12 [11:10] When A/D resolution is 12bit, X-position conversion MSB 2-bit
data value.
Data value(data [11:0]) = 0 ~ 0xFFF
YPDATA [9:0] Y-position conversion data value.
Data value(data [9:0]) = 0 ~ 0x3FF
-
3.6 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 state register 0x0
ADCUPDN Bit Description Initial State
TSC_UP [1] Stylus Up Interrupt history. (After check, this bit should be cleared
manually)
0 = No stylus up state.
1 = Stylus up interrupt has been occurred.
0
TSC_DN [0] Stylus Down Interrupt history. (After check, this bit should be
cleared manually)
0 = No stylus down state.
1 = Stylus down interrupt has been occurred.
0