Preliminary
S3C2451X RISC MICROPROCESSOR
ADC AND TOUCH SCREEN INTERFACE
24-9
Preliminary product information describe products that are in development,
for which full characterization data and associated errata are not yet available.
Specifications and information herein are subject to change without notice.
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
-
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