参数资料
型号: OR4E042BM416-DB
厂商: LATTICE SEMICONDUCTOR CORP
元件分类: FPGA
英文描述: FPGA, 1296 CLBS, 380000 GATES, PBGA416
封装: PLASTIC, FBGA-416
文件页数: 112/151页
文件大小: 2680K
代理商: OR4E042BM416-DB
Lattice Semiconductor
63
Data Sheet
September, 2002
ORCA Series 4 FPGAs
Conguration Data Format (continued)
Table 31. Conguration Frame Format and Contents
Table 31A. Conguration Frame Format and Contents for Embedded Block RAM
Frame
Contents
Description
Header
11110010
Preamble for generic FPGA.
24-bit length count
Conguration bitstream length.
11111111
8-bit trailing header.
ID Frame
0101 1111 1111 1111
ID frame header.
44 reserved bits
Reserved bits set to 0.
Part ID
20-bit part ID.
Checksum
8-bit checksum.
11111111
8 stop bits (high) to separate frames.
FPGA Header
1111 0010
This is a new mandatory header for generic portion.
11111111
8 stop bits (high) to separate frames.
FPGA Address Frame
00
Address frame header.
14-bit address
14-bit address of generic FPGA.
Checksum
8-bit checksum.
11111111
Eight stop bits (high) to separate frames.
FPGA Data Frame
01
Data frame header. same as generic.
Alignment bits
String of 0 bits added to frame to reach a byte bound-
ary.
Data bits
Number of data bits depends upon device.
Checksum
8-bit checksum.
11111111
Eight stop bits (high) to separate frames.
Postamble for Generic
FPGA
00 or 10
Postamble header, 00 = nish, 10 = more bits coming.
11111111 111111
Dummy address.
11111111 11111111
16 stop bits (high).
Frame
Contents
Description
RAM Header
11110001
A mandatory header for RAM bitstream portion.
11111111
8 stop bits (high) to separate frames.
RAM Address Frame
00
Address frame header. same as generic.
6-bit address
6-bit address of RAM blocks.
Checksum
8-bit checksum.
11111111
Eight stop bits (high) to separate frames.
RAM Data Frame
01
Data frame header. same as generic.
000000
Six of 0 bits added to reach a byte boundary.
512x18 data bits
Exact number of bits in a RAM block.
Checksum
8-bit checksum.
11111111
Eight stop bits (high) to separate frames.
Postamble for RAM
00 or 10
Postamble header. 00 = nish, 10 = more bits coming.
111111
Dummy address.
11111111 11111111
16 stop bits (high).
相关PDF资料
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OR4E042BM680-DB FPGA, 1296 CLBS, 380000 GATES, PBGA680
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