Samsung S3C2451X User Manual page 645

S3C2451X RISC MICROPROCESSOR
ADC AND TOUCH SCREEN INTERFACE SPECIAL REGISTERS
ADC CONTROL (ADCCON) REGISTER
Register
ADCCON 0x58000000
ADCCON Bit
ECFLG [15]
PRSCEN [14]
PRSCVL [13:6] A/D converter prescaler value.
Reserved [5:4]
RESSEL [3]
STDBM [2]
READ_ START [1]
ENABLE_ [0]
START
Address R/W
R/W ADC control register
End of conversion flag (read only).
0 = A/D conversion in process
1 = End of A/D conversion
A/D converter prescaler enable.
0 = Disable
1 = Enable
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)
Reserved
A/D converter resolution selection
0 = 10-bit resolution
1 = 12-bit resolution
Standby mode select.
0 = Normal operation mode
1 = Standby mode
A/D conversion starts by read.
0 = Disable start by read operation
1 = Enable start by read operation
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.
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
Description
Description
Reset Value
0x3FC4
Initial State
0
0
0xFF
0
0
1
0
0
24-5