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PRELIMINARY
SYSTEM CONTROLLER
S3C6400X RISC MICROPROCESSOR
3-24
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.
Clock source control register
S3C6400 has many clock sources, which include three PLL outputs, the external oscillator, the external clock, and
other clock sources from GPIO configuration. CLK_SRC register controls the source clock of each clock divider.
REGISTER
ADDRESS
R/W
DESCRIPTION
RESET VALUE
CLK_SRC 0x7E00_F01C
R/W
Select clock source
0x0000_0000
CLK_SRC
BIT
DESCRIPTION
RESET VALUE
TV27_SEL [31]
Control MUXTV27, which is the source clock of TV27MHz
(0: 27MHz, 1: FIN
EPLL
)
0
DAC27_SEL [30]
Control MUX
DAC27
, which is the source clock of DAC27MHz
(0:27MHz, 1: FIN
EPLL
)
0
SCALER_SEL [29:28]
Control MUX
SCALER
, which is the source clock of TVSCALER
(00:MOUT
EPLL
, 01: DOUT
MPLL
, 10: FIN
EPLL
)
0x0
LCD_SEL [27:26]
Control MUX
LCD
, which is the source clock of LCD
(00:MOUT
EPLL
, 01: DOUT
MPLL
, 10: FIN
EPLL
)
0x0
IRDA_SEL [25:24]
Control MUX
IRDA
, which is the source clock of IRDA
(00:MOUT
EPLL
, 01: DOUT
MPLL
, 10: FIN
EPLL
, 11: 48MHz)
0x0
MMC2_SEL [23:22]
Control MUX
MMC2
, which is the source clock of MMC2
(00:MOUT
EPLL
, 01: DOUT
MPLL
, 10: FIN
EPLL
, 11: 27MHz)
0x0
MMC1_SEL [21:20]
Control MUX
MMC1
, which is the source clock of MMC1
(00:MOUT
EPLL
, 01: DOUT
MPLL
, 10: FIN
EPLL
, 11: 27MHz)
0x0
MMC0_SEL [19:18]
Control MUX
MMC0
, which is the source clock of MMC0
(00:MOUT
EPLL
, 01: DOUT
MPLL
, 10: FIN
EPLL
, 11: 27MHz)
0x0
SPI1_SEL [17:16]
Control MUX
SPI1
, which is the source clock of SPI1
(00:MOUT
EPLL
, 01: DOUT
MPLL
, 10: FIN
EPLL
, 11: 27MHz)
0x0
SPI0_SEL [15:14]
Control MUX
SPI0
, which is the source clock of SPI0
(00:MOUT
EPLL
, 01: DOUT
MPLL
, 10: FIN
EPLL
, 11: 27MHz)
0x0
UART_SEL [13]
Control MUX
UART0
, which is the source clock of UART
(0:MOUT
EPLL
, 1: DOUT
MPLL
)
0
AUDIO1_SEL [12:10]
Control MUX
AUDIO1
, which is the source clock of IIS1, PCM1,
and AC97 1
(000:MOUT
EPLL
,0 01: DOUT
MPLL
, 010:FIN
EPLL
, 011:
IISCDCLK1, 100: PCMCDCLK)
0x0
AUDIO0_SEL [9:7]
Control MUX
AUDIO0
, which is the source clock of IIS0, PCM0,
and AC97 0
(000:MOUT
EPLL
, 001: DOUT
MPLL
, 010:FIN
EPLL
, 011:
IISCDCLK0, 10x: PCMCDCLK)
0x0
UHOST_SEL [6:5]
Control MUX
UHOST
, which is the source clock of USB Host
(00:48MHz, 01:MOUT
EPLL
, 10: DOUT
MPLL
, 11:FIN
EPLL
)
0x0