Samsung S3C2440A User Manual
Page 271
S3C2440A RISC MICROPROCESSOR
I/O PORTS
9-25
CLKSEL1
(1)
[10:8] Select source clock with CLKOUT1 pad
000 = MPLL output
001 = UPLL output
010 = RTC clock output
011 = HCLK
100 = PCLK
101 = DCLK1
11x = reserved
000
Reserved [7]
-
0
CLKSEL0
(1)
[6:4]
Select source clock with CLKOUT0 pad
000 = MPLL INPUT Clock(XTAL)
001 = UPLL output
010 = FCLK
011 = HCLK
100 = PCLK
101 = DCLK0
11x = reserved
010
SEL_USBPAD
[3]
USB1 Host/Device select register.
0 = use USB1 as Device
1 = use USB1 as Host
0
Reserved [2]
Reserved
0
SPUCR1
[1]
0 = DATA[31:16] port pull-up resister is enabled
1 = DATA[31:16] port pull-up resister is disabled
0
SPUCR0
[0]
0 = DATA[15:0] port pull-up resister is enabled
1 = DATA[15:0] port pull-up resister is disabled
0
Note 1) We recommend not to use this ouput pad to other device’s pll clock source.