• IEMEK Journal of Embedded Systems and Applications
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• v.18 no.1
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• pp.25-30
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• 2023

We propose a method to update DSP (Digital Signal Processor) firmware using USB (Universal Serial Bus) flash drives. The DSP automatically detects USB drives based on an interrupt when the USB drive is inserted into the USB port. The new firmware binary file is found in the mounted USB drive, and the destination address of DSP flash memory is identified for the firmware update writing by investigating the firmware file header. After the new firmware is written to the DSP flash memory, the DSP is reset and rebooted with the newly updated firmware. By employing TI's TMS320F28379D control card with USB ports, we conduct experiments and verify the normal operation of the implemented method.

• Proceedings of the Korea Information Processing Society Conference
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• 2008.11a
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• pp.810-813
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• 2008

본 논문에서 연구하고 구현된 JTAG(Joint Test Action Group) Writer는 하나의 SoC(System On a Chip)만 지원하도록 설계된 기존 제품의 단점을 보완할 수 있도록 각 SoC의 제조 회사에서 제공하는 BSDL(Boundary Scan Description Language)을 이용하여 여러 가지 SoC에 쉽게 사용할 수 있도록 모듈화 했다. 그리고 기존 제품들이 사용하고 있는 직렬 포트나 병렬 포트 대신 안정적이고 편리한 USB(Universal Serial Bus) 접속규격을 지원하도록 개선했다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2012.05a
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• pp.471-474
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• 2012

The administration of government agencies and Law enforcement agencies is utilize. that network separation and Establish CERT for network security. However, the legislature has a basic security system. so a lot of relative vulnerability. In this paper, study for security National Assembly and the National Assembly Secretariat, at Library of National Assembly on legislative National Assembly for information security and network configuration, network and external Internet networks is to divide the internal affairs. Network separation in accordance with the movement of materials to use secure USB memory, the user has the uncomfortable issues. Problem analysis and security vulnerabilities on the use of USB memory is study the problem. User efficiency and enhance security.

• Journal of Digital Convergence
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• v.12 no.1
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• pp.333-338
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• 2014

Zigbee is a wireless communication technology optimized for WSN (Wireless Sensor Network) environment. A WSN gateway is used for node control and data transmission. However, a fixed-type gateway can restrict the flexibility of the WSN environment. A smartphone-mounted high-performance processor and Android OS can be easily used in a mobile WSN gateway. In this paper, we proposed a mobile WSN gateway based on Android smartphones. In the proposed system, a Zigbee sensor module is connected with a smartphone via USB (Universal Serial Bus) port. We also implemented an Android application for the mobile WSN gateway.

• Journal of Broadcast Engineering
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• v.22 no.5
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• pp.665-670
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• 2017

In this paper, we propose an implementation technology for an active attenuator with the maximum attenuation of -110dBm in the frequency band of 50MHz to 2,15GHz. It provides USB interface to connect to PC providing GUI that sets signal frequency and attenuation step of minimum 1dB. As it attenuates the input signal level down to -110dBm, circuit and equipment design technologies are applied to control both internal and external electro-magnetic noises.. Through the performance test, it is assured that it attenuates input signal level down to -110dBm for the input signal levels of -10 to -30dBm.

• Proceedings of the Korea Committee for Ocean Resources and Engineering Conference
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• 2003.10a
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• pp.336-339
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• 2003

A digital data logging system has been developed for the purpose of a compact offline Ocean Bottom Seismometer(OBS). The Digital Data Logger(DDL) consists of A/D system, Micom with storage memory and firmware managing data files. The A/D system acquires data of 16bit/4ch with sampling rate of 250Hz per channel. The Micom, a micro controller board with T33521 processor of 8051 class, was equipped with 8 flash memories of 128MB for data storage capacity of 1GB. The firmware stores the acquiring data in form of binary files. The DDL was designated to be compact and light and to consume low energy as possible. The DDL is to interface with PC through USB(Universal Serial Bus). The performance of the DDL has been validated through tests with respect to a 3-axis seismometer.

• The Transactions of the Korea Information Processing Society
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• v.3 no.5
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• pp.1229-1239
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• 1996

The increase of additional information broadcasting of TV demands a graphic overlay processor. This paper is about the design, implementation and testing of a graphic overlay processor called by KBPS decoder ASSP (Applicatio n Specific Standard Product) which is compliance with Korea Broadcast Programming System. KBPS decoder ASSP consists of embedded 8 bit microprocessor Z80, graphic overlay controller, KBPS schedule decoder, memory controller, priority interrupt controller, MIDI controller, infrared raccoon receiver, async scrial communication controller, timer, bus controller, universal parallel input-output port and serial-parallel interface. The 0.8 micron CMOS Sea of Gate is used to implement the ASSP in amount of about 31,500 gates, and it is running at 14.318MHz.

• The Journal of Korean Institute of Electromagnetic Engineering and Science
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• v.23 no.4
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• pp.441-448
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• 2012

This paper proposes a multiband Multi-Input Multi-output(MIMO) antenna for universal serial bus(USB) dongle application. The proposed MIMO antenna consists of a modified meander strip line and inverted L stub. The two radiating elements of the MIMO antenna are symmetrically placed with respect to the center of the ground plane. The fabricated antenna satisfied a VSWR below 3 and an efficiency over 35 % in the LTE band 13, 17(704 MHz-787 MHz), DCS/PCS/WCDMA band(1.71 GHz-2.17 GHz), and LTE band 7(2.5 GHz-2.7 GHz). The envelope correlation coefficient(ECC) has below 0.45 in the LTE band 13, 17 and 0.1 in the DCS/PCS/WCDMA band and LTE band 7, respectively.

• Journal of information and communication convergence engineering
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• v.11 no.1
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• pp.7-11
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• 2013

Wearable computer systems use the wireless universal serial bus (WUSB), which refers to USB technology that is merged with WiMedia physical layer and medium access control layer (PHY/MAC) technical specifications. WUSB can be applied to wireless personal area network (WPAN) applications as well as wired USB applications such as PAN. WUSB specifications have defined high-speed connections between a WUSB host and WUSB devices for compatibility with USB 2.0 specifications. In this paper, we focus on an integrated system with a WUSB over an IEEE 802.15.6 wireless body area network (WBAN) for wireless wearable computer systems. Due to the portable and wearable nature of wearable computer systems, the WUSB over IEEE 802.15.6 hierarchical medium access control (MAC) protocol has to support power saving operations and integrate WUSB transactions with WBAN traffic efficiently. In this paper, we propose a low-power hibernation technique (LHT) for WUSB over IEEE 802.15.6 hierarchical MAC to improve its energy efficiency. Simulation results show that the LHT also integrates WUSB transactions and WBAN traffic efficiently while it achieves high energy efficiency.

• The KIPS Transactions:PartA
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• v.15A no.6
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• pp.317-324
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• 2008

In this paper, we propose a system which easily controls the existing serially connected multi-channel speakers in a general personal computer by using a USB(Universal Serial Bus) interface. The personal computer as a host of the USB interface analyzes a sound source and sends audio data in a real-time fashion by the use of the isochronous transmission, one of four transmission methods provided by the USB interface. In addition, a channel is assigned by means of the bulk transmission, one of four transmission methods provided by the USB interface. Transmitted data from the USB host are sent to each speaker through compression and packet generation process. Each speaker detects corresponding digital data and regenerates audio signals through DAC(Digital-to-Analog Converter). A user can easily select a sound source file and a channel by the use of a GUI environment in a personal computer.