NUC970 Technical Reference Manual
Publication Release Date: Dec. 15, 2015
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Revision V1.30
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5.7.4 Basic Configuration
Before using External Bus Interface, it
’s necessary to configure related pins as the EBI function and
enable EBI
’s clock.
For EBI related pin configuration, please refer to the register SYS_MFP_GPDH, SYS_MFP_GPHL,
SYS_MFP_GPHH, SYS_MFP_GPIL and SYS_MFP_GPIH to know how to configure related pins as
the EBI function.
To enable EBI
’s clock for operation, please set EBI (CLK_HCLKEN[9]) high.
5.7.5 Functional Description
EBI Memory Space
5.7.5.1
In this chip, two system memory spaces, 1
st
memory space is from 0x20000000 to 0x2FFFFFFF and
the other memory space is from 0xA0000000 to 0xAFFFFFFF, are defined to EBI. By programming
BASADDR (EBI_BNKCTLx[31:19], x is 0, 1, 2, 3 and 4) appropriately, user could map external device
to these two system memory spaces. When system request address hit the EBI
’s memory space, the
corresponding EBI chip select assert and EBI state machine operates.