
CLOCK & POWER MANAGEMENT
S3C2440A RISC MICROPROCESSOR
7-22
CLOCK CONTROL REGISTER (CLKCON)
Register
Address
R/W
Description
Reset Value
CLKCON
0x4C00000C
R/W
Clock generator control register
0xFFFFF0
CLKCON
Bit
[20]
Description
Initial State
1
AC97
Control PCLK into AC97 block.
0 = Disable, 1 = Enable
Control HCLK into Camera block.
0 = Disable, 1 = Enable
Control PCLK into SPI block.
0 = Disable, 1 = Enable
Control PCLK into IIS block.
0 = Disable, 1 = Enable
Control PCLK into IIC block.
0 = Disable, 1 = Enable
Control PCLK into ADC block.
0 = Disable, 1 = Enable
Control PCLK into RTC control block.
Even if this bit is cleared to 0, RTC timer is alive.
0 = Disable, 1 = Enable
Control PCLK into GPIO block.
0 = Disable, 1 = Enable
Control PCLK into UART2 block.
0 = Disable, 1 = Enable
Control PCLK into UART1 block.
0 = Disable, 1 = Enable
Control PCLK into UART0 block.
0 = Disable, 1 = Enable
Control PCLK into SDI interface block.
0 = Disable, 1 = Enable
Control PCLK into PWMTIMER block.
0 = Disable, 1 = Enable
Control PCLK into USB device block.
0 = Disable, 1 = Enable
Control HCLK into USB host block.
0 = Disable, 1 = Enable
Control HCLK into LCDC block.
0 = Disable, 1 = Enable
Control HCLK into NAND Flash Controller block.
0 = Disable, 1 = Enable
Control SLEEP mode of S3C2440A.
0 = Disable, 1 = Transition to SLEEP mode
Enter IDLE mode. This bit is not cleared automatically.
0 = Disable, 1 = Transition to IDLE mode
Reserved
Camera
[19]
1
SPI
[18]
1
IIS
[17]
1
IIC
[16]
1
ADC(&Touch Screen)
[15]
1
RTC
[14]
1
GPIO
[13]
1
UART2
[12]
1
UART1
[11]
1
UART0
[10]
1
SDI
[9]
1
PWMTIMER
[8]
1
USB device
[7]
1
USB host
[6]
1
LCDC
[5]
1
NAND Flash Controller
[4]
1
SLEEP
[3]
0
IDLE BIT
[2]
0
Reserved
[1:0]
0