Samsung S3C2440A User Manual download pdf (Page 271)

100

101

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

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

SPUCR0 [0] 0 = DATA[15:0] port pull-up resister is enabled

1 = DATA[15:0] port pull-up resister is disabled

Note 1) We recommend not to use this ouput pad to other device’s pll clock source.

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Samsung S3C2440A User Manual Page 271

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