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OR4 Datasheet(PDF) 71 Page - Lattice Semiconductor

Part # OR4
Description  ORCASeries 4 FPGAs
PDF  152 Pages
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Manufacturer  LATTICE [Lattice Semiconductor]
Direct Link  http://www.latticesemi.com
Logo LATTICE - Lattice Semiconductor

OR4 Datasheet(HTML) 71 Page - Lattice Semiconductor

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Lattice Semiconductor
71
Data Sheet
May, 2006
ORCA Series 4 FPGAs
FPGA Configuration Modes (continued)
5-5764(F)
Figure 43. Readback Through MPI
ENABLE MICROPROCESSOR
SET READBACK ADDRESS
WRITE RD_CFG TO 0
DATA_RDY = 1?
READ DATA REGISTER
START OF FRAME
INCREMENT ADDRESS
DATA = 0xFF?
YES
YES
READ STATUS REGISTER
IN CONTROL REGISTER 1
INTERFACE IN USER MODE
READ DATA REGISTER
FOUND?
READ UNTIL END OF FRAME
FINISHED
READBACK?
COUNTER IN SOFTWARE
YES
YES
WRITE RD_CFG TO 1
IN CONTROL REGISTER 1
STOP
NO
NO
ERROR
NO
ERROR
NO
READ DATA REGISTER
DATA = 0xFF?
YES
NO
ERROR



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