Samsung S3C2416 - ADC and Touch Screen Interface Special Registers; ADC Control (ADCCON) Register

S3C2416X RISC MICROPROCESSOR ADC AND TOUCH SCREEN INTERFACE
22-5
3 ADC AND TOUCH SCREEN INTERFACE SPECIAL REGISTERS
3.1 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