[U-Boot-Users] arm 920 / integrator interrupts / flash / misc
wd at denx.de
Fri Feb 28 10:34:15 CET 2003
In message <20030227155658.A22868 at europa.queda.net> you wrote:
> Thanks for your reply. I am trying to ensure that the clock / timer stuff is
> working properly.
> I had a question you might be able to answer: For the Arm920 system in the
> I am unclear what the bus definitions are for the following:
> get_FCLK(), get_HCLK(), get_PCLK() and get_UCLK()
> Ie: what does F, H, P, U represent?
See for example the documentation for the Samsung s3c2400/s3c2410
FCLK is used by ARM920T cpu core.
HCLK is used for AHB bus which is used by ARM920T cpu core, the
memory controller, the interrupt controller, LCD controller, the DMA
and the USB host block.
PCLK is used for APB bus which is used by the peripherals such as
WDT, IIS, I2C, PWM timer, MMC interface, ADC, UART, GPIO, RTC and
UCLK is the output of the USB dedicated PLL (UPLL) and is used
(obviously) for USB.
Software Engineering: Embedded and Realtime Systems, Embedded Linux
Phone: (+49)-8142-4596-87 Fax: (+49)-8142-4596-88 Email: wd at denx.de
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