DS480 Datasheet, PDF (4/6 Pages) Xilinx, Inc – Single master - no bus arbitration logic

Data Side OCM Bus v1.0
Data Side OCM Bus Parameters
Table 2: Data SIde OCM Bus Parameters
Parameter
Description
C_NUM_MASTERS
Number of DSOCM masters. The only
allowed value is 1
C_NUM_SLAVES
Number of DSOCM slaves
C_DSARCVALUE
Power-on offset of the 16 MB DSOCM
address window relative to the PLB
address range. For example, with
C_DSARCVALUE=0x54, the DSOCM
memory window will reside in the
address range:
0x5400_0000-0x54FF_FFFF.
C_DSCNTLVALUE
Power-on configuration of the PowerPC
processor DSOCM interface controller.
For details, see the “PowerPC 405
Processor Block Reference Guide”
C_FIXED_LATENCY
Virtex-4 only. Select between fixed
return data latency (=1) or handshake
(=0)
Default
1
1
0x31
0x81
1
Tool
Calculated
Yes
Yes
Type
integer
integer
Yes
std_logic_vector
Yes
std_logic_vector
No
integer
Allowable Parameter Combinations
There are no restrictions on allowed parameter combinations in this core.
For information about the OCM controller interface feature, see the PowerPC 405 Processor Block
Reference Guide.
Parameter - Port Dependencies
Table 3: Port and parameter dependencies
Name
Affects
Depends
Relationship Description
Design Parameters
C_NUM_SLAVES
S_BRAMDSOCM
RDDBUS
0 to C_NUM_
SLAVES*32-1
Scale width of OCM read data bus based
on number of connected slaves
C_NUM_SLAVES
S_DSOCMRW
COMPLETE
0 to C_NUM_
SLAVES
Scale width of OCM slave select based on
number of connected slaves
C_NUM_SLAVES
S_DSOCMSLAVE
SELECT
0 to C_NUM_
SLAVES
Scale width of OCM slave select based on
number of connected slaves
Port Signals
S_BRAMDSOCM
RDDBUS
C_NUM_SLAVES
Scale width of OCM read data bus based
on number of connected slaves
S_DSOCMRW
COMPLETE
C_NUM_SLAVES
Scale width of OCM slave select based on
number of connected slaves
S_DSOCMSLAVE
SELECT
C_NUM_SLAVES
Scale width of OCM slave select based on
number of connected slaves
4
www.xilinx.com
DS480 April 24, 2009
Product Specification