参数资料
型号: OR4E062BM680-DB
厂商: LATTICE SEMICONDUCTOR CORP
元件分类: FPGA
英文描述: FPGA, 2024 CLBS, 515000 GATES, PBGA680
封装: PLASTIC, FBGA-680
文件页数: 117/151页
文件大小: 2680K
代理商: OR4E062BM680-DB
68
Lattice Semiconductor
Data Sheet
September, 2002
ORCA Series 4 FPGAs
FPGA Conguration Modes (continued)
Note: M3 = GND for high-speed CCLK; M3 = VDD for low-frequency CCLK.
5-9739(F).a
Figure 40. Asynchronous Peripheral Conguration
Microprocessor Interface Mode
The built-in MPI in Series 4 FPGAs is designed for use in conguring the FPGA. Figure 41 show the glueless inter-
face for FPGA conguration and readback from the PowerPC processor. When enabled by the mode pins, the MPI
handles all conguration/readback control and handshaking with the host processor. For single FPGA congura-
tion, the host sets the conguration control register MPI_PRGM to one then back to zero and, after reading that the
conguration write data acknowledge register is high, transfers data 8, 16, or 32 bits at a time to the FPGA’s D[#:0]
input pins. If conguring multiple FPGAs through daisy-chain operation is desired, the SYS_DAISY bit must be set
in the conguration control register of the MPI.
The conguration control register offers control bits to enable the interrupt on a bit stream error. The MPI status
register may be used in conjunction with, or in place of, the interrupt request option. The status register contains a
2-bit eld to indicate the bit stream error status. A ow chart of the MPI conguration process is shown in Figure 42.
MICRO-
PRGM
ORCA
SERIES
FPGA
DOUT
CCLK
HDC
LDC
M2
M1
M0
VDD
TO DAISY-
CHAINED
DEVICES
PROCESSOR
D[7:0]
RDY/BUSY
INIT
DONE
ADDRESS
DECODE LOGIC
BUS
CONTROLLER
8
CS0
CS1
RD
WR
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