CN114676087B - Extended TTL communication device based on parallel port controller - Google Patents
Extended TTL communication device based on parallel port controller Download PDFInfo
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- CN114676087B CN114676087B CN202210599317.6A CN202210599317A CN114676087B CN 114676087 B CN114676087 B CN 114676087B CN 202210599317 A CN202210599317 A CN 202210599317A CN 114676087 B CN114676087 B CN 114676087B
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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
- G06F13/40—Bus structure
- G06F13/4063—Device-to-bus coupling
- G06F13/4068—Electrical coupling
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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
- G06F13/4204—Bus transfer protocol, e.g. handshake; Synchronisation on a parallel bus
- G06F13/4221—Bus transfer protocol, e.g. handshake; Synchronisation on a parallel bus being an input/output bus, e.g. ISA bus, EISA bus, PCI bus, SCSI bus
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management
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Abstract
The invention discloses an extended TTL communication device based on a parallel port controller, which comprises a PC bus, a bus digital isolation chip, a digital extender, an optical coupler isolator, a relay I, a jumper cap, a relay II, a first isolation power supply, a second isolation power supply, a third isolation power supply and a fourth isolation power supply, wherein the digital extender comprises more than one signal extension unit, the signal extension unit comprises an extended 8-channel circuit, and the extended 8-channel circuit is used for reading SOT signals and power supply signals and outputting 7 BIN signals and 1 EOT signal; the BIN signal is used as a handler class, the EOT signal is used as a test end signal, and the SOT signal is used as a test start signal. The invention has high test benefit and high test speed.
Description
Technical Field
The invention relates to an extended TTL communication device based on a parallel port controller, and belongs to the technical field of IC testing.
Background
1. The existing commonly used mechanical arms have the phenomena of various communication types, limited site (station) number and inconsistent TTL (transistor-transistor logic) levels; the level conversion of the adapter plate is needed at the output interface, and the number of the sites is limited;
2. the communication protocol needs to be isolated, so that the circuit is prevented from being damaged by static electricity and other interference;
3. most communication needs to be connected with test equipment, and TTL signals are sent to the outside through a circuit of the test equipment.
In addition, the parallel interface for computer bidirectional parallel communication is mainly used for printers and plotters, and has only a small number of other device applications, and the interface is generally called a printing interface or an LPT interface.
Disclosure of Invention
The purpose of the invention is as follows: in order to overcome the defects in the prior art, the invention provides the extended TTL communication device based on the parallel port controller, which has high test benefit and high speed.
The technical scheme is as follows: in order to achieve the purpose, the invention adopts the technical scheme that:
an extended TTL communication device based on a parallel port controller comprises a PC bus, a bus digital isolation chip, a digital expander, an optical coupling isolator, a first relay, a jumper cap, a second relay, a first isolation power supply, a second isolation power supply, a third isolation power supply and a fourth isolation power supply, wherein the digital expander comprises more than one signal extension unit, the signal extension unit comprises an extended 8-channel circuit, and the extended 8-channel circuit is used for reading SOT signals and power supply signals and outputting 7 BIN signals and 1 EOT signal; the BIN signal is used as processor classification, the EOT signal is used as test end signal, the SOT signal is used as test start signal, wherein:
the PC bus is respectively connected with the bus digital isolation chip and the first isolation power supply.
The bus digital isolation chip is respectively connected with the digital expander, the first isolation power supply, the optical coupling isolator, the second isolation power supply, the third isolation power supply and the fourth isolation power supply.
The digital expander is respectively connected with the optical coupler isolator, the first isolation power supply, the optical coupler isolator, the second isolation power supply, the third isolation power supply and the fourth isolation power supply.
And the optical coupling isolator is respectively connected with the first relay, the SOT signal input interface and the 8-channel output interface.
The first relay, the jumper wire cap and the second relay are connected in sequence.
And the second relay is respectively connected with the third isolation power supply and the fourth isolation power supply.
Preferably: the signal extension unit includes extension relay drive, extension relay drive and extension 8 passageway circuit connection, extension 8 passageway circuit includes 7 BIN signal output extension passageways and 1 EOT signal output extension passageway.
Preferably: the optocoupler isolator comprises 7 BIN signal output channels and 1 EOT signal output channel.
Preferably: the power supply self-adaptive circuit is used for comparing input signals and matching power supplies according to input levels.
Preferably: the input and output of the BIN signal, the EOT signal and the SOT signal pass through a bus digital isolation chip.
Preferably: the first isolation power supply is an isolation power supply converting ACDC5 to 5V, the second isolation power supply is an isolation power supply converting ACDC220V to 5V, the third isolation power supply is an isolation power supply converting ACDC5 to 12V, and the fourth isolation power supply is an isolation power supply converting ACDC5 to 5V.
Compared with the prior art, the invention has the following beneficial effects:
1. the multi-site connection handler (tester) is expanded, and the test benefit is increased; the test rate can be increased by multiple times at the same time.
2. And the adaptation to the handlers also enables the board card to be connected with different types of handlers to realize universality.
Drawings
FIG. 1 is a block diagram of an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of the ACDC power module.
Fig. 3 is a schematic structural diagram according to an embodiment of the present invention.
Fig. 4 is a schematic view of an interface terminal.
Detailed Description
The present invention is further illustrated by the following description in conjunction with the accompanying drawings and the specific embodiments, it is to be understood that these examples are given solely for the purpose of illustration and are not intended as a definition of the limits of the invention, since various equivalent modifications will occur to those skilled in the art upon reading the present invention and fall within the limits of the appended claims.
An extended TTL communication device based on a parallel port controller is shown in figures 1-3 and comprises a PC bus, a bus digital isolation chip, a digital expander, an optical coupling isolator, a first relay, a jumper cap, a second relay, a first isolation power supply, a second isolation power supply, a third isolation power supply, a fourth isolation power supply and a power supply self-adaptive circuit, wherein the digital expander comprises more than one signal expansion unit, the signal expansion unit comprises an expanded 8-channel circuit and an expanded relay drive, and the expanded 8-channel circuit is used for reading SOT signals and power supply signals and outputting 7 BIN signals and 1 EOT signal; the BIN signal is used as processor classification, the EOT signal is used as test end signal, the SOT signal is used as test start signal, wherein:
the PC bus is respectively connected with the bus digital isolation chip and the first isolation power supply.
The bus digital isolation chip is respectively connected with the digital expander, the first isolation power supply, the optical coupling isolator, the second isolation power supply, the third isolation power supply and the fourth isolation power supply. The first isolation power supply is an isolation power supply converting ACDC5 to 5V, the second isolation power supply is an isolation power supply converting ACDC220V to 5V, the third isolation power supply is an isolation power supply converting ACDC5 to 12V, and the fourth isolation power supply is an isolation power supply converting ACDC5 to 5V.
The digital expander is respectively connected with the optical coupler isolator, the first isolation power supply, the optical coupler isolator, the second isolation power supply, the third isolation power supply and the fourth isolation power supply.
And the optical coupling isolator is respectively connected with the first relay, the SOT signal input interface and the 8-channel output interface.
The first relay, the jumper wire cap and the second relay are connected in sequence.
And the second relay is respectively connected with the third isolation power supply and the fourth isolation power supply. The relay II controls a relay switch through a digital expander, and has the function of mainly providing different power supplies for an external handler and an internal isolation chip. The first relay is controlled by HVOUT, when HVIN has high level to control the first relay switch, the function level is self-adaptive, and when the external power supply is inconsistent with the internal level, the external level power supply is taken as the main power supply.
The extension relay driver is connected with an extension 8-channel circuit, and the extension 8-channel circuit comprises 7 BIN signal output extension channels and 1 EOT signal output extension channel. The expanded 8site circuit has the main functions of: A. the EOT signal of the BIN signal is sent, and the SOT signal is received. B. The serial test mode and the parallel test mode are controlled by software.
The optocoupler isolator comprises 7 BIN signal output channels and 1 EOT signal output channel.
The power supply self-adaptive circuit is used for comparing input signals and matching power supplies according to input levels. Specifically, when the HVIN has a high level, the relay is driven to be closed, and the power supply is switched from the internal power supply (5V, 12V is the internal power supply) to the external HVIN power supply.
The input and output of the BIN signal, the EOT signal and the SOT signal pass through a bus digital isolation chip. The isolation is carried out through a digital isolation chip (isolation voltage is 1500V), and the power supply is isolated through a DCDC module (the isolation voltage reaches 1500V).
8 sites of extended communication can be achieved through parallel ports; meanwhile, the circuit increases level self-adaptation, and when the input is inconsistent with the internal level, the external power supply is automatically switched. The input and output of the communication board card are increased by digital isolation, and the power supply is increased by isolation; the communication board card is an independent connecting device and is connected with the communication board card through a parallel port, and the communication board card is connected with an external handler.
As shown in fig. 4, the PC is a PC bus parallel port interface terminal, the PC receives and transmits data through the C bus parallel port interface terminal, and the pin function pin functions are as follows:
1 Strobe (STROBE LOW) 10 acknowledge (ACKNLG LOW)
2 data bit 0 (DATAO) 11 Busy (BUSY)
3 DATA bit 1 (DATA1) 12 paper out (PE)
4 DATA bits 2 (DATA2) 13 Selection (SLCT)
5 DATA bit 3 (DATA3) 14 auto-wrapping (AUTOFEED LOW LEVEL)
6 DATA bit 4 (DATA4) 15 ERROR opinion (ERROR Low level)
7 DATA bit 5 (DATA5) 16 is initialized (INIT Low level)
8 DATA bit 6 (DATA6) 17 select input (SLCTIN LOW level)
9 DATA bit 7 (DATA7) 18-25 ground line (GND)
1. Sending a BIN signal and an EOT signal to a handle (processor) through data bits; then, an SOT signal is obtained through signals of ACK #, busy, PE and SLCT;
2. the multi-site is expanded through INIT #, AFD #, SELIN #, STB #, and data bits; more sites can be expanded under the condition of reducing BIN information; 16site, 32site, 64 site.
3. The signal power supply from the PC, the internal power supply of the communication board and the external output power supply are independent isolated power supplies and are not grounded;
4. the connection handler is matched with the automatic switching of the power supply, and through comparison of differences of the input power supply, when the external input power supply is inconsistent with the internal power supply, the relay of the power supply is automatically switched to the external power supply.
In the embodiment, signals passing through parallel ports are isolated and then signals required by expanding a plurality of site signals are expanded, communication signals output externally comprise BIN and EOT signals, and input signals are mainly SOT signals; the BIN signal is used as a handler class, the EOT signal is used as a test end signal, and the SOT signal is used as a test start signal. The input and output of BIN, EOT and SOT signals to the outside are all through a digital isolation chip, so that the damage of external electric level to an internal chip is prevented. The invention increases the testing benefit by expanding the multi-site connection handler; the testing speed can be increased by multiple times at the same time; and the adaptation to the handlers also enables the board card to be connected with different types of handlers to realize universality.
The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.
Claims (6)
1. An extended TTL communication device based on parallel port controller, which is characterized in that: the digital extension device comprises more than one signal extension unit, wherein the signal extension unit comprises an extension 8-channel circuit, and the extension 8-channel circuit is used for reading SOT signals and power signals and outputting 7 BIN signals and 1 EOT signal; the BIN signal is used as processor classification, the EOT signal is used as test end signal, the SOT signal is used as test start signal, wherein:
the PC bus is respectively connected with the bus digital isolation chip and the first isolation power supply;
the bus digital isolation chip is respectively connected with the digital expander, the first isolation power supply, the optical coupling isolator, the second isolation power supply, the third isolation power supply and the fourth isolation power supply;
the digital expander is respectively connected with a first isolation power supply, an optical coupler isolator, a second isolation power supply, a third isolation power supply and a fourth isolation power supply;
the optical coupler isolator is respectively connected with the relay I, the SOT signal input interface and the 8-channel output interface;
the first relay, the jumper wire cap and the second relay are sequentially connected;
and the second relay is respectively connected with the third isolation power supply and the fourth isolation power supply.
2. The parallel port controller-based extended TTL communication device as recited in claim 1, wherein: the signal extension unit includes extension relay drive, extension relay drive and extension 8 passageway circuit connection, extension 8 passageway circuit includes 7 BIN signal output extension passageways and 1 EOT signal output extension passageway.
3. The parallel port controller-based extended TTL communication apparatus as recited in claim 2, wherein: the optocoupler isolator comprises 7 BIN signal output channels and 1 EOT signal output channel.
4. The parallel port controller-based extended TTL communication device as recited in claim 3, wherein: the power supply self-adaptive circuit is used for comparing input signals and matching power supplies according to input levels.
5. The parallel port controller-based extended TTL communication device as recited in claim 4, wherein: the input and output of the BIN signal, the EOT signal and the SOT signal all pass through the bus digital isolation chip.
6. The parallel port controller-based extended TTL communication device as recited in claim 5, wherein: the first isolation power supply is an isolation power supply converting ACDC5 to 5V, the second isolation power supply is an isolation power supply converting ACDC220V to 5V, the third isolation power supply is an isolation power supply converting ACDC5 to 12V, and the fourth isolation power supply is an isolation power supply converting ACDC5 to 5V.
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6948024B1 (en) * | 2001-05-01 | 2005-09-20 | Adaptec, Inc. | Expander device for isolating bus segments in I/O subsystem |
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| CN201000604Y (en) * | 2006-04-03 | 2008-01-02 | 杨文俊 | Input/output data acquisition system device |
| CN103019137A (en) * | 2012-12-07 | 2013-04-03 | 江苏嘉钰新能源技术有限公司 | Extendable measurement channel switching circuit |
| US9977422B2 (en) * | 2014-07-28 | 2018-05-22 | Computational Systems, Inc. | Intelligent configuration of a user interface of a machinery health monitoring system |
| CN111220401B (en) * | 2020-03-27 | 2021-09-28 | 大连交通大学 | General motor train unit single-train debugging simulation device and method |
| CN112178753A (en) * | 2020-09-01 | 2021-01-05 | 哈尔滨天达控制股份有限公司 | Intelligent heat supply controller and control method for heat exchange station with master-slave structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US6948024B1 (en) * | 2001-05-01 | 2005-09-20 | Adaptec, Inc. | Expander device for isolating bus segments in I/O subsystem |
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Address after: 210000 floor 2, building 26, South Park, Jiangsu Kecheng science and Technology Industrial Park, No. 19, Lanhua Road, Pukou District, Nanjing, Jiangsu Province Patentee after: Nanjing Hongtai Semiconductor Technology Co.,Ltd. Address before: 210000 floor 2, building 26, South Park, Jiangsu Kecheng science and Technology Industrial Park, No. 19, Lanhua Road, Pukou District, Nanjing, Jiangsu Province Patentee before: Nanjing Hongtai Semiconductor Technology Co.,Ltd. |
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