Samsung S3C2451X User Manual page 86

SYSTEM CONTROLLER
REGISTER DESCRIPTIONS
The system controller registers are divided into seven categories; clock source control, clock control, power
management, reset control, system controller status, bus configuration, and misc. The following section will
describe the behavior of the system controller.
ADDRESS MAP
Table 2-9 summarizes the address map of the system controller.
Register
LOCKCON0 0x4C00_0000
LOCKCON1 0x4C00_0004
OSCSET 0x4C00_0008
MPLLCON 0x4C00_0010
EPLLCON 0x4C00_0018
EPLLCON_K 0x4C00_001C
CLKSRC 0x4C00_0020
CLKDIV0 0x4C00_0024
CLKDIV1 0x4C00_0028
CLKDIV2 0x4C00_002C
HCLKCON 0x4C00_0030
PCLKCON 0x4C00_0034
SCLKCON 0x4C00_0038
PWRMODE 0x4C00_0040
SWRST 0x4C00_0044
BUSPRI0 0x4C00_0050
PWRCFG 0x4C00_0060
RSTCON 0x4C00_0064
RSTSTAT 0x4C00_0068
WKUPSTAT 0x4C00_006C
INFORM0 0x4C00_0070
INFORM1 0x4C00_0074
INFORM2 0x4C00_0078
INFORM3 0x4C00_007C
USB_PHYCTRL 0x4C00_0080
USB_PHYPWR 0x4C00_0084
USB_RSTCON 0x4C00_0088
USB_CLKCON 0x4C00_008C
Preliminary product information describe products that are in development,
2-20
for which full characterization data and associated errata are not yet available.
Specifications and information herein are subject to change without notice.
Table 2-9. System Controller Address Map
Address R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Description
MPLL lock time count register
EPLL lock time count register
Oscillator stabilization control register
MPLL configuration register
EPLL configuration register
EPLL configuration register for K value
Clock source control register
Clock divider ratio control register0
Clock divider ratio control register1
Clock divider ratio control register2
HCLK enable register
PCLK enable register
Special clock enable register
Power mode control register
Software reset control register
Bus priority control register 0
Power management configuration
register
Reset control register
Reset status register
Wake-up status register
SLEEP mode information register 0
SLEEP mode information register 1
SLEEP mode information register 2
SLEEP mode information register 3
USB PHY control register
USB PHY power control register
USB PHY reset control register
USB PHY clock control register
S3C2451X RISC MICROPROCESSOR
Alive Reset Value
X 0x0000_FFFF
X 0x0000_FFFF
O 0x0000_8000
X 0x0185_40C0
X 0x0120_0102
X 0x0000_0000
X 0x0000_0000
X 0x0000_000C
X 0x0000_0000
X 0x0000_0000
X 0xFFFF_FFFF
X 0xFFFF_FFFF
X 0xFFFF_DFFF
X 0x0000_0000
X 0x0000_0000
X 0x0000_0000
O 0x0000_0000
O 0x0006_0101
O 0x0000_0001
O 0x0000_0000
O 0x0000_0000
O 0x0000_0000
O 0x0000_0000
O 0x0000_0000
X 0x0000_0000
X 0x0000_0000
X 0x0000_0000
X 0x0000_0000