ieee1284

line only require the uplink resistance Rp. The data line and the Strobe line also require the series resistance Rs to match the line impedance, adjust the serial resistance value so that the sum of the output impedance with the drive is equal to the line impedance from 45 euro to 55 Euro. For example, if the output impedance of the driving IC is 15 euro, 33 euro series resistance is required. IEEE-1284 interface chip: Because the minimum output driving voltage is 2.4 V, the standard TTL + 5 V

has a support USB package outside, I haven't seen other Java class libraries that support USB directly. Sun's Commapi provides support for commonly used RS232 serial ports and IEEE1284 parallel port communication. Rs-232-c (also known as EIA Rs-232-c, hereinafter referred to as RS232) was established in 1970 by the American Electronics Industry Association (EIA) Joint Bell System, modem manufacturers and computer terminal manufacturers for serial com

, You need to configure the/D conversion interface circuit, Product The cost of data acquisition card is relatively expensive, and you develop a set of traditional Data collection The card requires a lot of knowledge, especially the development of low-layer drivers, which is difficult. 　　Define the foot position of a parallel interface 1. Physical Interface Description Computer port adapter or Data The acquisition card uses a multi-mode control chip. The operating mode of the p

conservative, it is to ensure the reliability of the FIFO operation. GPIF (General programmableInterface), that is, universal programmable interface, is the Cypress company in its EZ-USBA user-programming interface designed in FX and fx2 series single-chip microcomputer is fast and flexible. It can be seamlessly connected to peripheral devices using multiple protocols, such As Eide/atapi, ieee1284, and utopia. You can program it as needed without CPU

to complete the seamless connection with peripheral devices, such as Eide/atapi, IEEE1284, Utopia and so on. It can be programmed on demand and does not require CPU intervention in operation, only with some CPU flags and interrupts to communicate with the enhanced 8051 kernel. GPIF way, Inside is a master, and to control the periphery is a slave,Read-write signals and some control signals are sent by FX2; the periphery only provides you with a handsh

transmission is over, the DMA controller will return the bus control to the CPU. Second, common interface 1. Parallel interface At present, the parallel interface in the computer is mainly used as the printer port, the interface is no longer a 36-pin connector but a 25-pin D-connector. The so-called "parallel" refers to the 8-bit data transmission at the same time through parallel lines, so that the data transmission speed greatly increased, but the parallel transmission line length is limit

published on the java.sun.com website (download from here)----namely Comm.jar, call it JavatM Communications API, which is the standard extension of J2SE. Comm.jar not a recent, as early as 1998, Sun has already released this development package. Comm.jar provides a common RS232 serial port and IEEE1284 support for parallel port communications. Currently, Sun releases only two versions of Windows and Solaris platform Comm.jar, if you need Linux under

For small-and medium-sized enterprises and administrative units, the shared network printer is generally used to alleviate this problem. However, the disadvantage of this practice is that it puts a lot of data processing pressure on the computer where the network printer is located, and the printing speed is also reduced. As a result, many printing server products are available on the market. Today, let's take a look at how to install and use the printing server. The print server model used by t

Apsara Stack: ibm rs/6000Operating system version: AIx 4.3.3.0-10 1. View All adapters in the "available" status in the system F50:/# lsdev-CC adapter-S Sa0 available 01-s1 standard I/O serial port SA1 available 01-s2 standard I/O serial port Siokma0 available 01-k1 keyboard/mouse Adapter Fda0 available 01-d1 standard I/O diskette Adapter Scsi0 available 10-60 wide/fast-20 scsi I/O controller Mga0 available 10-78 gxt120p graphics Adapter Scsi1 available 10-88 wide/ultra-2 scsi I/O controller Ssa

card requires a lot of knowledge, especially the development of low-layer drivers, which is difficult. 　　Define the foot position of a parallel interface 　　1. Physical Interface Description The computer parallel adapter or data acquisition card basically adopts multi-mode control chip. The operating mode of the parallel adapter can be set in CMOS. The operating modes of parallel interfaces include standard parallel interfaces (SPP), simple bidirectional interfaces (PS/2), enhanced parallel inte

structure) is the IBM standard used in PS/2 computers and some laptops Supports multi-master DMA, 32-bit address and data lines, shared interrupts, and geo-addressing to access the onboard configuration register EISA The extended ISA (EISA) bus is a 32 extension to the ISA bus with a compatible interface connector Designed for jumper-free devices 32-bit address and data cable, multi-master DMA, and shared disconnection VLB

parallel transmission path is like a multiple-lane road, while a serial transmission allows only one car to pass through a single road. At present, the common serial bus has SPI, I2C, USB, IEEE1394, RS232, can and so on, while the parallel bus is relatively small, common such as IEEE1284, ISA, PCI and so on. Divide by clock signal mode According to the clock signal is independent, can be divided into Stang and Line. Stang clock signals are independ

, usually txd between the pins and the GND will have a negative voltage of about 3~15v, indicating that it is a txd stitch. Installing the Java Communications API Sun's J2SE does not directly provide any of the above mentioned in the development of a serial communication protocol, but instead in the form of a separate jar package published on the java.sun.com Web site (download from here)----that is Comm.jar, called JavaTM Communications API, which is the standard extension of J2SE. Comm.jar

interface circuit, the commercialization of data acquisition card price is more expensive, and their own development of a traditional data acquisition card requires a lot of knowledge of the reserve, especially related to low-level driver development, the difficulty is relatively large. Definition of the foot position of a parallel interface 1. Physical Interface Description Computer adapter or data acquisition card is basically a multi mode control chip, and the work of the adapter can be s