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Preliminary
S3C2451X RISC MICROPROCESSOR
ADC AND TOUCH SCREEN INTERFACE
24-5
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 AND TOUCH SCREEN INTERFACE SPECIAL REGISTERS
ADC CONTROL (ADCCON) REGISTER
Register Address
R/W
Description
Reset
Value
ADCCON 0x58000000
R/W
ADC
control register
0x3FC4
ADCCON Bit
Description
Initial
State
ECFLG
[15]
End of conversion flag (read only).
0 = A/D conversion in process
1 = End of A/D conversion
0
PRSCEN
[14]
A/D converter prescaler enable.
0 = Disable
1 = Enable
0
PRSCVL
[13:6] A/D converter prescaler value.
Data value: 5 ~ 255
Note that division factor is (N+1) when the prescaler value is N.
Note:
ADC frequency should be set less than PCLK by 5 times.
(Ex. PCLK = 10MHz, ADC Frequency < 2MHz)
0xFF
Reserved [5:4]
Reserved
0
RESSEL
[3]
A/D converter resolution selection
0 = 10-bit resolution
1 = 12-bit resolution
0
STDBM
[2]
Standby mode select.
0 = Normal operation mode
1 = Standby mode
1
READ_ START
[1]
A/D conversion starts by read.
0 = Disable start by read operation
1 = Enable start by read operation
0
ENABLE_
START
[0]
A/D conversion starts by setting this bit.
If READ_START is enabled, this value is not valid.
0 = No operation
1 = A/D conversion starts and this bit is cleared after the start-up.
0