Digi NS9210 - Manual (Page 23)

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C o n f i g u r a t i o n p i n s — C P U
None of the 64 GPIO pins on connector X2 disturb CPU boot strap functions. The
boot strap functions are controlled by address signals; the user can not disturb boot
strap functions from outside, if the module configuration signals, described below,
are correctly configured.
Default module
CPU
configuration
The user has access to six configuration signals:
„
LITTLE#/BIG_ ENDIAN which allows the user to select the endianess of the
module
„
OCD_EN# which allows the user to activate on-chip debugging
„
SW_CONF [3:0] which are reserved for the user; the user software can read out
these signals through the GEN ID register
(@ 0xA090_0210).