Adc And Touch Screen Interface Special Registers; Adc Control (Adccon) Register - Samsung S3C2416 User Manual

S3C2416X RISC MICROPROCESSOR

3 ADC AND TOUCH SCREEN INTERFACE SPECIAL REGISTERS

3.1 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.
ADC AND TOUCH SCREEN INTERFACE
Description
Description
Reset Value
0x3FC4
Initial State
0
0
0xFF
0
0
1
0
0
22-5