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 interrupt 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
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