WO2006035479A1 - 送信装置、受信装置、伝送システム、伝送方法 - Google Patents
送信装置、受信装置、伝送システム、伝送方法 Download PDFInfo
- Publication number
- WO2006035479A1 WO2006035479A1 PCT/JP2004/014068 JP2004014068W WO2006035479A1 WO 2006035479 A1 WO2006035479 A1 WO 2006035479A1 JP 2004014068 W JP2004014068 W JP 2004014068W WO 2006035479 A1 WO2006035479 A1 WO 2006035479A1
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- WIPO (PCT)
- Prior art keywords
- transmission
- data
- synchronization signal
- timing
- system clock
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Classifications
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/38—Information transfer, e.g. on bus
- G06F13/42—Bus transfer protocol, e.g. handshake; Synchronisation
- G06F13/4282—Bus transfer protocol, e.g. handshake; Synchronisation on a serial bus, e.g. I2C bus, SPI bus
- G06F13/4291—Bus transfer protocol, e.g. handshake; Synchronisation on a serial bus, e.g. I2C bus, SPI bus using a clocked protocol
Definitions
- Transmission device reception device, transmission system, and transmission method
- the present invention relates to a transmission device, a reception device, a transmission system, and a transmission method, and in particular, a transmission device, a reception device for performing data transmission by synchronizing between a plurality of LSIs (Large Scale Integrated circuits),
- the present invention relates to a transmission system and a transmission method.
- FIG. 9 is a block diagram showing an example of the configuration of a conventional inter-LSI transmission system.
- the inter-LSI transmission system of FIG. 9 includes one transmitting side LSI 101 and two receiving side LSIs 102a and 102b.
- the receiving-side LSI 102a and the receiving-side LSI 102b have the same configuration.
- the clock transmission path for transmitting the source clock and the data transmission path for transmitting the transmission data need to be transmitted with the same line length, so they are bundled together. .
- a transmission-side LSI system clock is input from the outside to the transmission-side LSI 101.
- the receiving-side LSI system clock is input from the outside to the receiving-side LSIs 102a and 102b.
- an inter-LSI synchronization signal is input from the outside to the transmitting-side LSI 101 and the receiving-side LSIs 102a and 102b.
- Patent Document 1 As a related art related to the present invention, for example, Patent Document 1 shown below is known.
- Patent Document 1 Japanese Patent Application Laid-Open No. 2001-195354 (Page 3-5, Fig. 1) [0006]
- synchronization is established with the first clock of the source clock from the transmission-side LSI 101 in order to determine the timing at which transmission data to the LSI 102a and the LSI 102b can be referred to.
- the quality of the initial waveform in high-frequency transmission is poor, so it is not reliable to use only the first clock for synchronization.
- the present invention has been made to solve the above-described problems, and an object thereof is to provide a transmission device, a reception device, a transmission system, and a transmission method that perform high-speed and high-reliability inter-LSI communication. To do.
- the present invention provides a transmission device that transmits a source clock, transmission data, and a transmission synchronization signal indicating the timing of the transmission data to a reception device, and is input from the outside.
- a transmission device system clock that is transmitted to the reception device as the source clock, and a transmission unit that transmits the transmission data to the reception device in accordance with the transmission device system clock, and a device that receives the transmission device system clock from an external source.
- the apparatus includes at least one transmission synchronization signal generation unit that generates the transmission synchronization signal based on the timing of the inter-station synchronization signal.
- the present invention is a receiving device that receives a source clock, transmission data, and a transmission synchronization signal that represents a timing of the transmission data, transmitted from a transmission device, the source clock and the transmission synchronization.
- Write address generation unit that generates a write address based on the signal timing, and read address generation that generates a read address based on the timing of an externally received receiver system clock and externally input device synchronization signal
- a data buffer for storing the transmission data in accordance with the write address and reading out the stored data in accordance with the read address.
- the frequency of the receiving device system clock is: And lZm times the frequency of the transmitter system clock (1, m are integers), and the read address generator reads data to read data at a rate of m bits in one cycle of the receiver system clock. A timing and a read address are generated, and the data buffer reads the stored data at a speed of m bits per cycle of the receiver system clock according to the read timing and the read address. To do.
- the inter-device synchronization signal is characterized in that the timing is the same in the plurality of receiving devices.
- the present invention provides a source clock, transmission data, a transmission synchronization signal that indicates the timing of the transmission data, a transmission device that transmits, and at least one that receives the source clock, the transmission data, and the transmission synchronization signal.
- the transmission device includes a transmission device system clock input from the outside as the source clock to the reception device, and the transmission device according to the transmission device system clock.
- a data transmission unit that transmits data to a reception device; and at least one transmission synchronization signal generation unit that generates the transmission synchronization signal based on a timing of the transmission device system clock and an inter-device synchronization signal input from the outside;
- the receiving device is based on the timing of the source clock and the transmission synchronization signal.
- a write address generation unit that generates a write address; a read address generation unit that generates a read address based on the timing of an externally received receiver system clock and an external device input synchronization signal; and the transmission data Is stored in accordance with the write address, and a data buffer for reading out the stored data in accordance with the read address.
- the frequency of the receiver device system clock is lZm times (1, m is an integer) the frequency of the transmitter device system clock
- the read address generation The unit generates a read timing and a read address for reading data at a speed of m bits per cycle of the receiver system clock, and the data buffer stores the stored data according to the read timing and the read address. It is characterized in that it is read out at a rate of m bits every cycle of the receiver system clock.
- the inter-device synchronization signal has the same timing in the plurality of receiving devices.
- the present invention is a transmission method for transmitting a source clock, transmission data, and a transmission synchronization signal representing the timing of the transmission data from the transmission device to the reception device, wherein an external force is also input to the transmission device.
- Transmitting the transmission device system clock to the reception device as the source clock, and transmitting the transmission data to the reception device according to the transmission device system clock; and in the transmission device, the transmission device system clock and External force At least one transmission synchronization signal generating step for generating a transmission synchronization signal based on the timing of the input transmission device system clock and the inter-device synchronization signal; and in the receiving device, the source clock and the transmission synchronization signal Write that generates a write address based on the timing of An address generation step; a read address generation step for generating a read address based on a timing of a receiving device system clock and an inter-device synchronization signal input from an external force in the receiving device; and the receiving device from the transmitting device.
- the frequency of the receiver system clock is lZm times (1, m is an integer) the frequency of the transmitter apparatus system clock
- the read address The generation step generates a read timing and a read address for reading data at a speed of m bits every cycle of the receiver system clock, and the data storage step according to the read timing and the read address.
- the stored data is read out at a rate of m bits every cycle of the receiver system clock.
- the inter-device synchronization signals have the same timing in the plurality of receiving devices.
- the transmission device is a transmission-side LSI in the embodiment.
- the receiving device is the receiving-side LSI in the embodiment.
- the inter-device synchronization signal is an inter-LSI synchronization signal in the embodiment.
- the receiving device system clock is the receiving-side LSI system clock in the embodiment.
- the data transmission unit is a part for outputting transmission data composed of the latch 13 in the embodiment, and a part for outputting the source LSI system clock power.
- FIG. 1 is a block diagram showing an example of a configuration of an inter-LSI transmission system according to the present invention.
- FIG. 2 is a block diagram showing an example of a configuration of a transmission-side LSI according to the present invention.
- FIG. 3 is a block diagram showing an example of a configuration of a receiving-side LSI according to the present invention.
- FIG. 4 is a time chart showing an example of the operation of the inter-LSI transmission system according to the present invention.
- FIG. 5 is a block diagram showing an example of a configuration of a transmission synchronization signal generation unit according to the present invention.
- FIG. 6 is a block diagram showing an example of a configuration of a write address generation unit according to the present invention.
- FIG. 7 is a block diagram showing an example of a configuration of a data buffer according to the present invention.
- FIG. 8 is a block diagram showing an example of a configuration of a read address generation unit according to the present invention.
- FIG. 9 is a block diagram showing an example of a configuration of a conventional inter-LSI transmission system.
- FIG. 1 is a block diagram showing an example of a configuration of an inter-LSI transmission system according to the present invention.
- the inter-LSI transmission system in FIG. 1 includes one transmitting-side LSI 1 and two receiving-side LSIs 2a and 2b.
- the receiving-side LSI 2a and the receiving-side LSI 2b have the same configuration.
- the clock transmission path for transmitting the source clock, the transmission synchronization signal transmission path for transmitting the transmission synchronization signal, and the data transmission path for transmitting the transmission data have the same line length. Since they need to be transmitted in the network, they are bundled together.
- a transmission side LSI system clock is input from the outside to the transmission side LSI 1.
- the receiving side LSI system clock is input from the outside to the receiving side LSIs 2a and 2b.
- an inter-LSI synchronization signal is input from the outside to the transmitting-side LSI 1 and the receiving-side LSIs 2a and 2b.
- the receiving LSI system clock and the timing for receiving the inter-LSI synchronization signal are the same.
- FIG. 2 is a block diagram showing an example of the configuration of the transmission-side LSI according to the present invention.
- Sender L The SI 1 includes a transmission synchronization signal generation unit 11 and latches 12 and 13.
- the transmission synchronization signal generation unit 11 and the latches 12 and 13 operate with a transmission-side LSI system clock to which an external force is also input.
- FIG. 3 is a block diagram showing an example of the configuration of the receiving-side LSI according to the present invention.
- the reception side LSI 2a includes a data buffer 21, a write address generation unit 22, a read address generation unit 23, and a latch 24.
- the data buffer 21, the write address generation unit 22, and the latch 24 operate with the source clock input from the transmission-side LSI 1.
- the read address generator 23 operates with a receiving-side LSI system clock to which an external force is also input.
- FIG. 4 is a time chart showing an example of the operation of the inter-LSI transmission system according to the present invention.
- the transmission-side LSI system clock, transmission synchronization signal, and transmission data are shown as waveforms on the transmission-side LSI1.
- the waveforms of the receiving LSIs 2a and 2b are the source clock, transmission synchronization signal, write address, write data, receiving LSI system clock, inter-LSI synchronization signal, read address, and read data.
- the frequency ratio between the transmitter L SI system clock that drives the transmitter LSI and the receiver LSI system clock that drives the receiver LSI is an integer ratio.
- the transmission synchronization signal generation unit 11 In the transmission-side LSI 1, the transmission synchronization signal generation unit 11 generates a transmission synchronization signal having a cycle that is an integral multiple of the transmission-side LSI system clock, and outputs the transmission synchronization signal to the reception-side LSI 2a or the reception-side LSI 2b via the latch 12. .
- FIG. 5 is a circuit diagram showing an example of the configuration of the transmission synchronization signal generation unit according to the present invention.
- the transmission synchronization signal generator 11 includes a counter 31 and a decoder 32. Counter 31 is reset by the inter-LSI synchronization signal and counts according to the transmitting LSI system clock.
- the decoder 32 outputs a pulse when the output of the counter 31 reaches a predetermined value, that is, when a predetermined time elapses.
- the sending LSI 1 sends the source clock, transmission synchronization signal, and transmission data simultaneously.
- FIG. 6 is a circuit diagram showing an example of the configuration of the write address generation unit according to the present invention.
- the write address generation unit 22 includes a counter 41 and a decoder 42.
- Counter 41 is L Reset by SI synchronization signal and count according to source clock.
- the decoder 42 outputs the output of the counter 41 as a write address.
- the data buffer 21 samples the transmission data using the source clock, and stores the transmission data as write data according to the value of the write address.
- FIG. 7 is a circuit diagram showing an example of the configuration of the data buffer according to the present invention.
- the data buffer 21 includes a latch 51, n (n is an integer) buffer 52, and a selector 53. In writing, the transmission data is latched by the latch 51 and stored in the buffer 52 in order according to the write address.
- FIG. 8 is a circuit diagram showing an example of the configuration of the read address generation unit according to the present invention.
- the read address generation unit 23 includes a counter 61, a decoder 62, a counter 63, and a decoder 64.
- the counter 61 is reset by the inter-LSI synchronization signal and counts according to the receiving-side LSI system clock.
- the decoder 62 resets the counter 63 when it becomes a value synchronized with the cycle of the output force synchronization signal of the counter 61.
- Counter 63 increments at a rate that increases by m every cycle of the receiving LSI system clock.
- the decoder 64 outputs the output of the counter 63 as a read address.
- the selector 53 of the data buffer 21 in FIG. 7 follows the read address from the outputs (n bits) of the n buffers 52 at a speed of m bits for each cycle of the receiving LSI system clock.
- the buffer 52 is sequentially selected so as not to exceed the speed, and is output as read data.
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- Theoretical Computer Science (AREA)
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- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Synchronisation In Digital Transmission Systems (AREA)
- Information Transfer Systems (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006537573A JP4486092B2 (ja) | 2004-09-27 | 2004-09-27 | 送信装置、受信装置、伝送システム、伝送方法 |
PCT/JP2004/014068 WO2006035479A1 (ja) | 2004-09-27 | 2004-09-27 | 送信装置、受信装置、伝送システム、伝送方法 |
US11/708,000 US7526017B2 (en) | 2004-09-27 | 2007-02-20 | Transmitting device, receiving device, transmission system, and transmission method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2004/014068 WO2006035479A1 (ja) | 2004-09-27 | 2004-09-27 | 送信装置、受信装置、伝送システム、伝送方法 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US11/708,000 Continuation US7526017B2 (en) | 2004-09-27 | 2007-02-20 | Transmitting device, receiving device, transmission system, and transmission method |
Publications (1)
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WO2006035479A1 true WO2006035479A1 (ja) | 2006-04-06 |
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PCT/JP2004/014068 WO2006035479A1 (ja) | 2004-09-27 | 2004-09-27 | 送信装置、受信装置、伝送システム、伝送方法 |
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US (1) | US7526017B2 (ja) |
JP (1) | JP4486092B2 (ja) |
WO (1) | WO2006035479A1 (ja) |
Families Citing this family (1)
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US9517737B2 (en) * | 2013-07-01 | 2016-12-13 | Continental Automotive Systems, Inc. | Relay control between power distribution center and body control module |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001195354A (ja) * | 2000-01-12 | 2001-07-19 | Nec Corp | Lsi間データ転送システム及びそれに用いるソースシンクロナスデータ転送方式 |
JP2002108809A (ja) * | 2000-09-29 | 2002-04-12 | Nec Corp | ソースシンクロナスデータ転送方法及びソースシンクロナスデータ転送装置 |
JP2004038457A (ja) * | 2002-07-02 | 2004-02-05 | Toshiba Lsi System Support Kk | 半導体回路装置 |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62103745A (ja) * | 1985-10-31 | 1987-05-14 | Kokusai Electric Co Ltd | デ−タ通信の送,受信制御回路 |
DE68916945T2 (de) | 1989-04-28 | 1995-03-16 | Ibm | Synchronisierschaltung für Datenüberträge zwischen zwei mit unterschiedlicher Geschwindigkeit arbeitenden Geräten. |
JP2703377B2 (ja) * | 1989-12-28 | 1998-01-26 | 株式会社東芝 | バッファ装置 |
JPH03265239A (ja) * | 1990-03-14 | 1991-11-26 | Fujitsu Ltd | クロック乗換え回路 |
DE19733748C2 (de) * | 1997-08-04 | 1999-07-15 | Bosch Gmbh Robert | Datenübertragungsvorrichtung |
JP2001251283A (ja) * | 2000-03-06 | 2001-09-14 | Hitachi Ltd | インターフェース回路 |
JP2002368727A (ja) | 2001-06-04 | 2002-12-20 | Nec Corp | 半導体集積回路 |
JP4741122B2 (ja) * | 2001-09-07 | 2011-08-03 | 富士通セミコンダクター株式会社 | 半導体装置及びデータ転送方法 |
JP4012032B2 (ja) * | 2001-11-20 | 2007-11-21 | キヤノン株式会社 | データ通信装置 |
-
2004
- 2004-09-27 WO PCT/JP2004/014068 patent/WO2006035479A1/ja active Application Filing
- 2004-09-27 JP JP2006537573A patent/JP4486092B2/ja not_active Expired - Fee Related
-
2007
- 2007-02-20 US US11/708,000 patent/US7526017B2/en not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001195354A (ja) * | 2000-01-12 | 2001-07-19 | Nec Corp | Lsi間データ転送システム及びそれに用いるソースシンクロナスデータ転送方式 |
JP2002108809A (ja) * | 2000-09-29 | 2002-04-12 | Nec Corp | ソースシンクロナスデータ転送方法及びソースシンクロナスデータ転送装置 |
JP2004038457A (ja) * | 2002-07-02 | 2004-02-05 | Toshiba Lsi System Support Kk | 半導体回路装置 |
Also Published As
Publication number | Publication date |
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US7526017B2 (en) | 2009-04-28 |
JP4486092B2 (ja) | 2010-06-23 |
JPWO2006035479A1 (ja) | 2008-05-15 |
US20080069192A1 (en) | 2008-03-20 |
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