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| 型號(hào)： | M-ORSO82G51BM680-DB |
| 廠商： | LATTICE SEMICONDUCTOR CORP |
| 元件分類(lèi)： | FPGA |
| 英文描述： | FPGA, 1296 CLBS, 333000 GATES, PBGA680 |
| 封裝： | PLASTIC, FBGA-680 |
| 文件頁(yè)數(shù)： | 2/123頁(yè) |
| 文件大?。?/td> | 2207K |
| 代理商： | M-ORSO82G51BM680-DB |
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Lattice Semiconductor
ORCA ORSO82G5 Data Sheet
10
including data FIFOs. Transfer accesses can be single beat (1 x 4 bytes or less), 4-beat (4 x 4 bytes), 8-beat (8 x 2
bytes), or 16-beat (16 x 1 bytes).
System Bus
An on-chip, multimaster, 32-bit system bus with 4-bit parity facilitates communication among the MPI, conguration
logic, FPGA control, and status registers, Embedded Block RAMs, as well as user logic. Utilizing the AMBA speci-
cation Rev 2.0 AHB protocol, the Embedded System Bus offers arbiter, decoder, master, and slave elements.
Master and slave elements are also available for the user-logic and a slave interface is used for control and status
of the embedded backplane transceiver portion of the ORSO82G5.
The system bus control registers can provide control to the FPGA such as signaling for reprogramming, reset func-
tions, and PLL programming. Status registers monitor INIT, DONE, and system bus errors. An interrupt controller is
integrated to provide up to eight possible interrupt resources. Bus clock generation can be sourced from the Micro-
Processor Interface clock, conguration clock (for slave conguration modes), internal oscillator, user clock from
routing, or from the port clock (for JTAG conguration modes).
Phase-Locked Loops
Up to eight PLLs are provided on each Series 4 device, with four user PLLs generally provided for FPSCs. Pro-
grammable PLLs can be used to manipulate the frequency, phase, and duty cycle of a clock signal. Each PPLL is
capable of manipulating and conditioning clocks from 15 MHz to 420 MHz. Frequencies can be adjusted from 1/8x
to 8x, the input clock frequency. Each programmable PLL provides two outputs that have different multiplication fac-
tors but can have the same phase relationships. Duty cycles and phase delays can be adjusted in 12.5% of the
clock period increments. An automatic input buffer delay compensation mode is available for phase delay. Each
PPLL provides two outputs that can have programmable (12.5% steps) phase differences.
Embedded Block RAM
New 512 x 18 quad-port RAM blocks are embedded in the FPGA core to signicantly increase the amount of mem-
ory and complement the distributed PFU memories. The EBRs include two write ports, two read ports, and two
byte lane enables which provide four-port operation. Optional arbitration between the two write ports is available,
as well as direct connection to the high-speed system bus.
Additional logic has been incorporated to allow signicant exibility for FIFO, constant multiply, and two-variable
multiply functions. The user can congure FIFO blocks with exible depths of 512K, 256K, and 1K including asyn-
chronous and synchronous modes and programmable status and error ags. Multiplier capabilities allow a multiple
of an 8-bit number with a 16-bit xed coefcient or vice versa (24-bit output), or a multiply of two 8-bit numbers (16-
bit output). On-the-y coefcient modications are available through the second read/write port.
Two 16 x 8-bit CAMs per embedded block can be implemented in single match, multiple match, and clear modes.
The EBRs can also be preloaded at device conguration time.
Conguration
The FPGAs functionality is determined by internal conguration RAM. The FPGAs internal initialization/congura-
tion circuitry loads the conguration data at powerup or under system control. The conguration data can reside
externally in an EEPROM or any other storage media. Serial EEPROMs provide a simple, low pin-count method for
conguring FPGAs.
The RAM is loaded by using one of several conguration modes. Supporting the traditional master/slave serial,
master/slave parallel, and asynchronous peripheral modes, the Series 4 also utilizes its MicroProcessor Interface
and Embedded System Bus to perform both programming and readback. Daisy chaining of multiple devices and
partial reconguration are also permitted.
Other conguration options include the initialization of the embedded-block RAM memories and FPSC memory as
well as system bus options and bit stream error checking. Programming and readback through the JTAG (IEEE
1149.2) port is also available meeting In-System Programming (ISP) standards (IEEE 1532 Draft).
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