Synonyms for usart or Related words with usart
Examples of "usart"
The operation of a
is intimately related to the various protocols; refer to those pages for details. This section only provides a few general notes.
All STM32 microcontrollers have a ROM'ed bootloader that supports loading a binary image into its flash memory using one or more peripherals (varies by STM32 family). Since all STM32 bootloaders support loading from the
peripheral and most boards connect the
to RS-232 or a USB-to-UART adapter IC, thus it's a universal method to program the STM32 microcontroller. This method requires the target to have a way to enable/disable booting from the ROM'ed bootloader (i.e. jumper / switch / button).
Chipset: In addition to the Z80 and 6502, the system also included Intel 8255A PIO, Intel 8251A
, Intel 8214 Programmable Interrupt Controller, Motorola 6845 CRT controller, Western Digital 1793 floppy disk controller, and OKI MSM5832 real time clock.
A Universal Synchronous/Asynchronous Receiver/Transmitter (
) is a type of a serial interface device that can be programmed to communicate asynchronously or synchronously. See Universal asynchronous receiver/transmitter (UART) for a discussion of the asynchronous capabilities of these devices.
External interfaces include USB, CAN, Ethernet, SPI,
and ADC. A DMA controller provides direct communication channels between external interfaces and memories, increasing data throughput with minimal processor intervention.
ADC resolutions range from 10 to 24 bits, and other on-chip analog peripherals include DACs (resolutions to 12-bits), a voltage reference, comparators, a temperature sensor, programmable gain array (PGA) and oscillators. Digital peripherals can include external memory interface, timers, programmable counter array (PCA) modules and UART,
, SPI, I²C/SMBus, I2S and more.
Her work is included in the permanent collections of the US Embassy in Abuja, Nigeria, Cheekwood Museum of Art, and the Tennessee State Museum. Outlaw's work has been featured in "Art in America", "Art Papers", "World Sculpture", "Sculpture", "
", "FiberArts", and "Number: An Independent Arts Journal". Outlaw is a graduate of the School of the Art Institute of Chicago and Vanderbilt University.
The STK600 allows in-system programming from the PC via USB, leaving the RS-232 port available for the target microcontroller. A 4 pin header on the STK600 labeled 'RS-232 spare' can connect any TTL level
port on the chip to an onboard MAX232 chip to translate the signals to RS-232 levels. The RS-232 signals are connected to the RX, TX, CTS, and RTS pins on the DB-9 connector.
The Atmel 8-bit AVR RISC-based microcontroller combines 32 kB ISP flash memory with read-while-write capabilities, 1 kB EEPROM, 2 kB SRAM, 23 general purpose I/O lines, 32 general purpose working registers, three flexible timer/counters with compare modes, internal and external interrupts, serial programmable
, a byte-oriented 2-wire serial interface, SPI serial port, 6-channel 10-bit A/D converter (8-channels in TQFP and QFN/MLF packages), programmable watchdog timer with internal oscillator, and five software selectable power saving modes. The device operates between 1.8-5.5 volts.
A UART is usually an individual (or part of an) integrated circuit (IC) used for serial communications over a computer or peripheral device serial port. UARTs are now commonly included in microcontrollers. A dual UART, or "DUART", combines two UARTs into a single chip. Similarly, a quadruple UART or "QUART", combines four UARTs into one package, such as the NXP 28L194. An octal UART or "OCTART" combines eight UARTs into one package, such as the Exar XR16L788 or the NXP SCC2698. A related device, the Universal Synchronous/Asynchronous Receiver/Transmitter (
) also supports synchronous operation.
The Type II Communication Scanner performed functions similar to a
. There was an interrupt for every transmitted or received character. Six different asynchronous character formats, two forms of Bisync and HDLC/SDLC were supported. A single scanner could attach up to 96 (64 for the first scanner) half-duplex lines. This is the basis of the theoretical maximum capacity of 352 lines. In practice the limit was lower as a scanner with more than 48 half duplex lines could not support any 9.6 kbit/s lines.
Semiconductor companies such as Atmel take the ARM cores, which use a consistent set of instructions and register naming, and add peripheral circuits such as ADCs (analog to digital converters), clock management, and serial communications such as
, SPI, CAN, LIN, and I2C. Atmel made efforts to adapt advanced peripherals and power management that used very little power and can operate independently without having the CPU core powered up (sleepwalking). They also provided for DMA between external interfaces and memories increasing data throughput with minimal processor intervention.
In 1979 Jack Mitchell, William L. Scheding, and Henry Harold, former SDS engineers, along with some other ex-SDS people restarted the company with funding from Max Palevsky, Sanford Kaplan, Dan McGurk, and others. They introduced a microprocessor-based computer called the SDS-420 built on a 6502A-based processor design with up to 56KB of memory and a proprietary OS, SDS-DOS, along with the BASIC programming language from Microsoft. The SDS-420 featured a dual single-sided-double-density (400KB per side) floppy drive, Model 70, manufactured by PerSci (Peripheral Sciences), of Santa Monica and Marina del Rey, California. The SDS-422 Model offered some of the first dual double-sided-double-density floppy drives. Other hardware options were a 6551-A
and a proprietary network SDS-NET using a Z8530 SDLC/HDLC chip and software patterned after the early Xerox 3.0 Mbit/s Ethernet and tranceivers produced by Tat Lam of the Bay Area.
The device comes in a variety of configurations featuring the usual peripherals: internal oscillator, timer including PWM, watchdog,
, SPI, I²C, 10/12/14/16/24-bit ADCs, and brownout reset circuitry. Some less usual peripheral options include comparators (that can be used with the timers to do simple ADC), on-chip op-amps for signal conditioning, 12-bit DAC, LCD driver, hardware multiplier, USB, and DMA for ADC results. Apart from some older EPROM (MSP430E3xx) and high volume mask ROM (MSP430Cxxx) versions, all of the devices are in-system programmable via JTAG (full four-wire or Spy-Bi-Wire) or a built in bootstrap loader (BSL) using UART such as RS232, or USB on devices with USB support.
Other offerings included: Legal Time and Billing, Medical Time and Billing, and TTY an early terminal emulation program using the 6551
. Through partnerships with their VARS (Value Added Resellers) other software product offerings included a solid-waste management system with automated truck routing and a country-club accounting package. One UK-based VAR was Jacq-Rite, a vertical market software house run by Ken Groome and Vivienne Gurney and based in Dorking, Surrey. Jacq-Rite had developed a range of specialist insurance software for the Jacquard machine but transferred to the SDS 400 following the advice of John McCully. Jacq-Rite installed several SDS 400 series networks in Lloyd's Managing and Members Agencies during 1982 and 1983. One of Jacq-Rite's programming staff that worked on the software porting was Justin Hill. Jacq-Rite's hardware sales were managed by David Ensor.
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