WO2005091357A1 - プログラマブル・ロジック・デバイスおよびその設計方法 - Google Patents
プログラマブル・ロジック・デバイスおよびその設計方法 Download PDFInfo
- Publication number
- WO2005091357A1 WO2005091357A1 PCT/JP2005/004221 JP2005004221W WO2005091357A1 WO 2005091357 A1 WO2005091357 A1 WO 2005091357A1 JP 2005004221 W JP2005004221 W JP 2005004221W WO 2005091357 A1 WO2005091357 A1 WO 2005091357A1
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- WO
- WIPO (PCT)
- Prior art keywords
- logic
- programmable
- programmable logic
- logic element
- logical
- Prior art date
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- H01L27/02—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier
- H01L27/04—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier the substrate being a semiconductor body
- H01L27/10—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier the substrate being a semiconductor body including a plurality of individual components in a repetitive configuration
- H01L27/118—Masterslice integrated circuits
Definitions
- the present invention relates to a programmable 'logic' device in which a plurality of programmable logic elements are arranged in a row and column direction, and a design method thereof.
- DSPs digital signal processors
- microprocessors there is a degree of program freedom at the instruction level by changing the instruction program.
- processing performance is inferior to ASICs (Application Specified ICs) limited to specific applications.
- a programmable logic device that can flexibly change the circuit configuration by a program has attracted attention.
- programmable logic devices There are several types of programmable logic devices.
- a typical example is an FPGA (Field Programmable Gate Array).
- FPGA Field Programmable Gate Array
- these devices have the advantage of being able to change the circuit configuration by programming, but also have problems such as an increase in area and power consumption compared to ASICs.
- Patent Document 1 a wiring resource for connecting logic elements on a programmable 'logic' device is compared with a first resource having a communication speed called “normal speed” and a first resource. It is composed of two wiring resources, a second resource with high speed. The ratio of these two resources is such that the first resource occupies most of the wiring resources and the second resource occupies a minority part. This eliminates the need for a high-speed design for all wiring by using the second resource only for some wiring that requires high-speed communication and using the first resource for normal communication. In addition, an increase in area due to high-speed design can be suppressed.
- Patent Document 1 Japanese Patent Publication No. 2002-538634
- the programmable 'logic' device of Patent Document 1 has the effect of reducing the wiring area between logic elements and reducing power consumption, the logic elements are all within the device. It has the same configuration. That is, no improvement is considered for the logical element itself, that is, for the internal structure. Therefore, considering the realization of an application using this programmable logic device, the logic elements are divided into two processing blocks, one processing block requiring high-speed processing and the other processing block requiring low-speed processing. However, when designing a logic element, it is necessary to design it so that it can correspond to the circuit block that requires the highest speed.
- the power consumption P of a semiconductor device is generally represented by the following equation.
- the first term of the above equation 1 is power consumption during the operation of the device
- the second term of the above equation 1 is power consumption due to a leakage current which is a current when the device is off.
- power consumption due to leakage current has increased with the miniaturization of semiconductor processes, and power consumption during operation has been increasing. It cannot be ignored compared to power consumption.
- reduction of leakage current is also an important factor. Only power consumption during operation is considered, and power consumption due to leakage current is not considered.
- the present invention solves the above-mentioned problems, and has an object to realize a small area and low power consumption.
- a first invention is a programmable logic device in which a plurality of programmable logic elements are arranged, wherein the plurality of logic elements implement a predetermined logic.
- a first logical element having the same logic as the first logical element, and a second logical element having a design upper limit of operation speed lower than that of the first logical element.
- the second invention further provides that the second logical element is used for the first logical element.
- a transistor whose threshold voltage is higher than that of a transistor is used.
- a third invention is further characterized in that the second logical element has a layout structure different from that of the first logical element.
- the first logic element operates with a clock signal having a first clock frequency
- the second logic element has a second logic element which is lower than the first clock frequency
- a fifth invention is further characterized in that the first logic element is fixedly arranged at one place.
- the first logical element is further disposed in a central portion, and the second logical element is disposed in a peripheral portion in comparison with a region in which the first logical element is disposed. It is characterized by being arranged.
- the second logical element is disposed in a central portion, and the first logical element is disposed in a peripheral portion in comparison with a region in which the second logical element is disposed. It is characterized by being arranged.
- An eighth invention is a method of designing a programmable 'logic' device in which a plurality of programmable logic elements are arranged, and designs a first logic element having a predetermined logic. And a step of designing a second logic element having the same logic as the first logic element and having a lower operation speed design upper limit than the first logic element. I do.
- a circuit part requiring high speed is realized by using the first logical element, and a circuit part operating at low speed is realized by using the second logical element. Therefore, compared to a case where all circuits are realized by using the first logic element corresponding to a high speed, it is possible to realize a small area and with low power consumption.
- the circuit portion that operates at a low speed increases the threshold voltage of the transistor of the second logic element, so that the leakage current can be reduced. Low power consumption can be realized.
- a circuit part requiring high speed is realized by using the first logic element, and a circuit part operating at low speed is realized by the second logic element. Therefore, all circuits can be realized in a smaller area and with lower power consumption as compared to the case where all circuits are realized using the first logic element.
- the clock signal of the low-speed clock frequency is supplied to the logic element designed for low-speed operation, power consumption due to the high-speed clock frequency can be suppressed, Further lower power consumption can be realized.
- the first logical element when a circuit part requiring high speed is realized by using the first logical element in the application to be realized, the first logical element requires high-speed communication. Can be efficiently arranged, and a small area can be achieved when mapping to a programmable 'logic' device.
- circuits that require high-speed operation are collectively arranged in the central portion, so that wiring between logical elements can be efficiently performed.
- Application can be realized in a small area.
- efficient mapping can be achieved by arranging the circuit parts that perform high-speed control collectively in the center. It is.
- the seventh invention in an application requiring high-speed external input / output, by arranging a circuit part requiring high-speed signal processing close to the external input / output, the Since wiring can be efficiently realized, an application can be realized with a small area. In particular, it is possible to efficiently map applications that require large amounts of input / output data, require high-speed processing, and have a high degree of parallelism. It is.
- FIG. 1 is a configuration diagram showing a programmable 'logic' device according to a first embodiment of the present invention.
- FIG. 2 is a block diagram of a logic element mounted on the programmable logic device shown in FIG. 1.
- FIG. 3 is a configuration diagram showing a programmable 'logic' device according to a second embodiment of the present invention.
- FIG. 4 is a configuration diagram showing a programmable 'logic' device according to a third embodiment of the present invention.
- FIG. 1 is a configuration diagram showing a programmable logic device according to the first embodiment.
- the programmable logic device 101 has the same logical structure and function as the region 1 (103) formed by arranging a plurality of first logical elements 102 and the first logical element 102. However, between the region 2 (105) in which a plurality of second logic elements 104 formed by using transistors having a high threshold voltage as transistors constituting the circuit and each first logic element 102 are provided.
- a wiring 106 disposed between each second logic element 104 in the horizontal and vertical directions and interconnecting the first logic element 102 or the second logic element 104 with each other, and two different frequency A clock is output, and although not shown in the figure, a higher frequency clock is supplied to the logic element 102 in the first area 103, and a lower frequency clock is supplied to the logic element 102 in the second area 105.
- a clock generating block 107 supplies the Remento 10 4, and an external IO block 108 that communicates with the outside of the chip.
- FIG. 2 shows the internal structure of the first logic element 102 and the second logic element 104 mounted on the programmable logic device of FIG.
- the logic elements 102 and 104 include a configuration memory 202 for storing circuit configuration information via a wiring 106 for interconnecting adjacent elements, and a plurality of programs stored in the configuration memory 202.
- a powerful arithmetic block 203 such as an arithmetic and logic operation circuit or a multiplier, capable of performing various types of arithmetic operations, and a program stored in the configuration memory 202, which temporarily holds the arithmetic result of the arithmetic block 203.
- Multiple registers 204 that can be connected to the input of the operation block 203 and the output of the register 204 by the program stored in the configuration memory 202 to connect the logical elements 102 or the logical elements 104 to each other.
- a switch box 205 that can be connected to the wiring 106 to be connected.
- the first logical element 1 of FIG. When the second logic element 104 is compared with the second logic element 104, the second logic element 104 has a high threshold voltage and uses a transistor, so that the operation speed of the operation block is lower than that of the first logic element 102. Become. However, since the threshold voltage of the transistor is high, the second logic element 104 consumes less power than the first logic element 102, which has a small leakage current when the transistor is off.
- the operation of the present embodiment configured as described above will be described below.
- digital baseband processing of a CDMA (Code Division Multiple Access) communication system includes a correlation peak detection process in a synchronization unit, a finger process in a synchronization detection unit, a cell search process for controlling the finger unit, and a channel codec process.
- the correlation peak detection processing and the finger processing are processings for performing a plurality of parallel processings on input data. Processing can be distributed and parallelized. Therefore, the operating frequency can be lowered, so that area 2 of the programmable 'logic' device can be allocated.
- the logic elements in the device all use the same threshold voltage transistors.
- Using Programmable Logic Devices It can be realized with low power consumption as compared with the case of realizing the above.
- FIG. 3 is a configuration diagram showing a programmable 'logic' device according to the second embodiment.
- the programmable logic device 301 has a completely different logical structure and function compared to the region 1 (303) in which a plurality of first logic elements 302 are arranged and the first logic element 302.
- Area 2 which is the same but has a small gate width W as a transistor constituting a circuit, a plurality of second logic elements 304 configured using transistors, and each first logic Wiring 306, which is arranged horizontally and vertically between the elements 302 or between each second logic element 304 and interconnects the first logic element 302 or the second logic element 304; Clocks of two different frequencies, not shown in the figure, the higher frequency clock is supplied to the logic element 302 in the first area 303, and the lower frequency clock is supplied to the second element 303.
- a clock generating block 307 supplies the logical Engineering Remento 304 of band 305, and an external IO block 308 that communicates with the outside of the chip.
- the logical structure and function of the first logical element 302 and the second logical element 304 mounted on the programmable 'logic' device of FIG. 3 are the same as the logical elements 102 and 104 of the first embodiment. .
- the second logical element 304 uses a transistor with a small gate width W, and has a low current supply capability.
- the operation speed of the operation block is lower than that of the first logic element 302.
- the second logic element 304 since the second logic element 304 has a gate width W of a transistor, the parasitic load on the gate is small and the wiring load on the input portion is small. Therefore, the second logic element 304 can reduce the capacitance C of Equation 1 and can reduce power consumption during operation as compared with the first logic element 302. In addition, the second logic element 304 has a smaller area than the first logic element 302 because of the gate width W of the transistor.
- the gate width W of the transistor of the second logic element 304 is small, the gate capacitance is small and power consumption during operation is reduced. Further, since the gate width W of the transistor of the second logic element 304 used for the correlation peak detection processing and the finger processing is small, the area is small.
- the region 1 that operates at a high speed is arranged at the center of the programmable 'logic' device. This is effective when the processing mapped to area 1 controls the processing mapped to area 2 or when the parameters required for processing area 2 are output. This is because the wiring connecting the region 1 to the region 2 has a short distance. That is, using the above example of the CDMA communication system, when the optimal parameters calculated by the cell search processing unit mapped to region 1 are transmitted to the finger processing unit mapped to region 2, the finger processing unit This is because it is possible to establish a connection to a short distance.
- arranging the region 1 that operates at high speed in the center of the programmable 'logic' device is not limited to the circuit portion that needs to operate at high speed, and the circuit portion that operates at low speed. This is advantageous for applications that require high-speed control over minutes.
- FIG. 4 is a configuration diagram showing a programmable 'logic' device according to the third embodiment.
- the programmable 'logic' device 401 has exactly the same logical structure and function as the region 1 (402) formed by arranging a plurality of first logical elements and the first logical element.
- a region 2 (403) configured by arranging a plurality of second logic elements having a low design upper limit of the operation speed, and a clock having two different frequencies are output, and shown in the figure
- a clock generation block 404 that supplies a higher frequency clock to the logic element of the first area 402 and supplies a lower frequency clock to the second logic element of the second area 403. .
- region 1 has a configuration arranged at the periphery of programmable “logic” device 401
- region 2 has a configuration arranged at the center of programmable “logic” device 401.
- MPEG encoding includes processing such as motion vector detection, discrete cosine transform, and quantization.
- processing block with the highest speed and the largest processing amount is motion solid calculation.
- this processing is an operation for correlating a plurality of macro blocks close to a certain macro block, and requires a large amount of external input of macro block data.
- this operation is a process of calculating the sum of absolute values of the differences from the macroblock (SAD operation: Sum of Absolute Difference), and the parallelism of the process is high and each SAD operation is independent.
- the motion vector detection processing is mapped to the area 1 (402) of the programmable logic device 401 in FIG. 4, and the discrete cosine transform and the quantization
- the processing is mapped, since the area 1 (402) is arranged close to the external input / output, it is possible to input data required for the motion vector detection processing at high speed.
- each motion vector detection process is independent Therefore, there are few long wires connecting the logical elements inside the area 1 (402). Therefore, the motion vector detection processing can be efficiently mapped to region 1 (402).
- the amount of input / output data from the outside is large, high-speed processing is required, and each processing with high processing parallelism is independently performed. It is possible to efficiently realize such applications.
- a circuit part requiring high speed is realized by using the first logic element, and a circuit part operating at low speed is realized by the second logic element. Because it can be implemented using logic elements, all circuits can be implemented in a smaller area and with lower power consumption than when implemented using the first logic element that supports high speed.
- the present invention is useful as a programmable logic device in which a plurality of programmable logic elements are arranged in the row and column directions.
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP05720492A EP1727196A1 (en) | 2004-03-18 | 2005-03-10 | Programmable logic device and its designing method |
US10/581,024 US7492184B2 (en) | 2004-03-18 | 2005-03-10 | Programmable logic device and method for designing the same |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004078826A JP2005268536A (ja) | 2004-03-18 | 2004-03-18 | プログラマブル・ロジック・デバイスおよびその設計方法 |
JP2004-078826 | 2004-03-18 |
Publications (1)
Publication Number | Publication Date |
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WO2005091357A1 true WO2005091357A1 (ja) | 2005-09-29 |
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PCT/JP2005/004221 WO2005091357A1 (ja) | 2004-03-18 | 2005-03-10 | プログラマブル・ロジック・デバイスおよびその設計方法 |
Country Status (5)
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US (1) | US7492184B2 (ja) |
EP (1) | EP1727196A1 (ja) |
JP (1) | JP2005268536A (ja) |
CN (1) | CN100470759C (ja) |
WO (1) | WO2005091357A1 (ja) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
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US9564902B2 (en) | 2007-04-17 | 2017-02-07 | Cypress Semiconductor Corporation | Dynamically configurable and re-configurable data path |
US8516025B2 (en) * | 2007-04-17 | 2013-08-20 | Cypress Semiconductor Corporation | Clock driven dynamic datapath chaining |
US8026739B2 (en) | 2007-04-17 | 2011-09-27 | Cypress Semiconductor Corporation | System level interconnect with programmable switching |
US8111577B2 (en) | 2007-04-17 | 2012-02-07 | Cypress Semiconductor Corporation | System comprising a state-monitoring memory element |
US20080263319A1 (en) * | 2007-04-17 | 2008-10-23 | Cypress Semiconductor Corporation | Universal digital block with integrated arithmetic logic unit |
US7737724B2 (en) | 2007-04-17 | 2010-06-15 | Cypress Semiconductor Corporation | Universal digital block interconnection and channel routing |
JP2012109854A (ja) * | 2010-11-18 | 2012-06-07 | Panasonic Corp | プログラマブル・ロジック・デバイス |
US10790830B1 (en) * | 2019-05-20 | 2020-09-29 | Achronix Semiconductor Corporation | Fused memory and arithmetic circuit |
US11256476B2 (en) | 2019-08-08 | 2022-02-22 | Achronix Semiconductor Corporation | Multiple mode arithmetic circuit |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH0766373A (ja) * | 1993-08-26 | 1995-03-10 | Olympus Optical Co Ltd | マスタースライス方式の半導体集積回路装置 |
JPH07161938A (ja) * | 1993-12-13 | 1995-06-23 | Hitachi Ltd | 半導体集積回路 |
JPH07297291A (ja) * | 1994-04-27 | 1995-11-10 | Hitachi Ltd | フィールドプログラマブルゲートアレイ |
US20020100944A1 (en) * | 1999-06-29 | 2002-08-01 | Hitachi, Ltd. | Semiconductor integrated circuit device |
WO2003001591A1 (fr) * | 2001-06-25 | 2003-01-03 | Hitachi, Ltd | Circuit integre semiconducteur, procede et systeme de fabrication de ce dernier |
US20030016055A1 (en) * | 2001-07-17 | 2003-01-23 | Hitachi, Ltd. | Semiconductor integrated circuit, method and program for designing the semiconductor integrated circuit |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1092268B1 (en) | 1999-03-04 | 2008-04-23 | Altera Corporation | Interconnection and input/output resources for programmable logic integrated circuit devices |
US6944836B1 (en) * | 2002-11-15 | 2005-09-13 | Xilinx, Inc. | Structures and methods for testing programmable logic devices having mixed-fabric architectures |
US6930510B2 (en) * | 2003-03-03 | 2005-08-16 | Xilinx, Inc. | FPGA architecture with mixed interconnect resources optimized for fast and low-power routing and methods of utilizing the same |
-
2004
- 2004-03-18 JP JP2004078826A patent/JP2005268536A/ja active Pending
-
2005
- 2005-03-10 CN CNB2005800018324A patent/CN100470759C/zh not_active Expired - Fee Related
- 2005-03-10 WO PCT/JP2005/004221 patent/WO2005091357A1/ja not_active Application Discontinuation
- 2005-03-10 EP EP05720492A patent/EP1727196A1/en not_active Withdrawn
- 2005-03-10 US US10/581,024 patent/US7492184B2/en not_active Expired - Fee Related
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0766373A (ja) * | 1993-08-26 | 1995-03-10 | Olympus Optical Co Ltd | マスタースライス方式の半導体集積回路装置 |
JPH07161938A (ja) * | 1993-12-13 | 1995-06-23 | Hitachi Ltd | 半導体集積回路 |
JPH07297291A (ja) * | 1994-04-27 | 1995-11-10 | Hitachi Ltd | フィールドプログラマブルゲートアレイ |
US20020100944A1 (en) * | 1999-06-29 | 2002-08-01 | Hitachi, Ltd. | Semiconductor integrated circuit device |
WO2003001591A1 (fr) * | 2001-06-25 | 2003-01-03 | Hitachi, Ltd | Circuit integre semiconducteur, procede et systeme de fabrication de ce dernier |
US20030016055A1 (en) * | 2001-07-17 | 2003-01-23 | Hitachi, Ltd. | Semiconductor integrated circuit, method and program for designing the semiconductor integrated circuit |
Also Published As
Publication number | Publication date |
---|---|
US20080042687A1 (en) | 2008-02-21 |
EP1727196A8 (en) | 2007-01-03 |
CN100470759C (zh) | 2009-03-18 |
CN1906754A (zh) | 2007-01-31 |
EP1727196A1 (en) | 2006-11-29 |
JP2005268536A (ja) | 2005-09-29 |
US7492184B2 (en) | 2009-02-17 |
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