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->Cirrus Logic ARM EP7312 Development Board
-Hardware Setup</TITLE
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-NAME="SETUP-ARM-EP7312">Cirrus Logic ARM EP7312 Development Board
-Hardware Setup</H1
-><P
->The Cirrus Logic EP7312 Development Board is similar
-to the EP7212 Development Board from a hardware setup viewpoint,
-and is based on the same port of eCos.</P
-><P
->When rebuilding the RedBoot ROM image or an eCos application,
-change the "Cirrus Logic processor variant" option
-(CYGHWR_HAL_ARM_EDB7XXX_VARIANT)
-from the EP7211 to the EP7312. This can be selected in the
-<SPAN
-CLASS="emphasis"
-><I
-CLASS="EMPHASIS"
->eCos Configuration Tool</I
-></SPAN
->
-, or if using ecosconfig, can be set by uncommenting the user_value
-property of this option in ecos.ecc and setting it to "EP7312".</P
-><P
->See the RedBoot documentation for building and installing RedBoot for this
-target. Only RedBoot is supported as a boot image; ROMRAM startup is
-recommended.</P
-><DIV
-CLASS="SECT2"
-><H2
-CLASS="SECT2"
-><A
-NAME="EP7312-90MHZ-OPERATION">90MHz Operation</H2
-><P
->The EP7xxx targets offer a choice of clock speeds, from 18MHz to a maximum,
-normally, of 72MHz. These are described as kHz values 18432 36864 49152
-and 73728 within the configuration tool. If you have a release which
-supports it, you will also see 90317 as an available option here, for 90MHz
-operation.</P
-><P
->This option only applies to certain EP7312 hardware, not all EP7312 boards
-support it. Do not select 90MHz when building RedBoot or your eCos
-application unless you are absolutely sure that your board supports it.</P
-><P
->If you do have a 90MHz board and wish to execute at 90MHz, it is in fact
-not necessary to build RedBoot specially, if you build your eCos
-application configured for 90MHz. RedBoot will run at 72MHz and your
-application will run at 90MHz. If you do install a 90MHz RedBoot, then you
-must build eCos for 90MHz or timing and baud rates on serial I/O will be
-wrong.</P
-><P
->In other words, code (either eCos app or RedBoot) built for 90MHz will
-“change up a gear” when it starts up; but code built for 72MHz,
-because it needs to run correctly on boards without the
-“gearbox” does not change back down, so if you mix the two,
-unexpected timing can result. To run a non-eCos application without any
-hardware initialization code at 90MHz, you must install a specially-built
-RedBoot.</P
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-Hardware Setup</TD
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