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S3C2410A ADC AND TOUCH SCREEN INTERFACE
16-7
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: 1 ~ 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
SEL_MUX [5:3] Analog input channel select.
000 = AIN 0
001 = AIN 1
010 = AIN 2
011 = AIN 3
100 = AIN 4
101 = AIN 5
110 = AIN 6
111 = AIN 7 (XP)
0
STDBM [2] Standby mode select.
0 = Normal operation mode
1 = Standby mode
1
READ_
START
[1] A/D conversion start 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