单片机不是设计来做密集乘法任务的,即使是一些现代的GPP,也要求多个指令周期来做一次乘法。而DSP处理器使用专门的硬件来实现单周期乘法。DSP处理器还增加了累加器寄存器来处理多个乘积的和。累加器寄存器通常比其他寄存器宽,增加称为结果bits的额外bits来避免溢出。
单片机是Single-chip Microcomputer的较准确译法,但***能准确反映单片机设计思想、并且有长远技术眼光的词汇是Microcontroller(微控制器)。之所以出现Single-chip Microcomputer一词,实在是因为早期,甚至到MSC-51时期,单片机准确地体现了Single-chip Microcomputer的形态和内容。然而发展到MSC-96,发展到新一代80C51、M68HC05、M68HC11系列单片机时,在单片机中着力扩展了各种控制功能,如:A/D、PWM、PCA计数器捕获/比较逻辑、高速I/O口、WDT等,已突破了Microcontroller的传统内容,朝Microcontroller的内涵发展。因此,目前已到了该给单片机正名的时候了,国外已逐渐统一成Microcontroller。如果我们仍然保留单片机这一习惯叫法,则应把它认为是一个单片形态的微控制器,或直接称作微控制器或单片微控制器,而不要再使用单片微型计算机或单片计算机这些词汇了。
另:集成技术的***新进展之一是将 CPU 和外围芯片,如程序存储器,数据存储器,并行,串行I/O口,定时/计数器,中断控制器及其他控制部件集成在一下芯片中,制成单片机Single-chip Microcomputer。
FNW 500-150 VALVE *USED*
MERLIN GERIN C60N 60A-TYPE C *USED*
NO***ON 275129B *USED*
ELECTROMATE WM242412NC *USED*
HAMMOND MANUFACTURING 1435C *USED*
LOT OF 3 DECCO 9-100M COIL *USED*
LOT OF 3 DECCO 9-2946M COIL *USED*
KEBA KEMRO-BUS/A RACK *USED*
GORMAN-RUPP 27515-561 *USED*
HARRIS P0200333 CONTROLLER *USED*
HARRIS L0204140 CONTROLLER *USED*
HARRIS I0200140 CONTROLLER *USED*
HARRIS PX1001001 CONTROLLER *USED*
HARRIS UMPU CONTROLLER *USED*
FIFE CORPORATION 338-FIFE CONTROLLER *USED*
HEIDENHAIN 237 133 BH 470MM *USED*
TRI-PYRAMID INDUSTRIAL 400 480V *USED*
ALCO VALVE CO. S115 230V SOLENOID VALVE *USED*
WEB BREAK SIGNAL DISCRIMINATOR 5683 REV.B *USED*
BODINE 837 MOTOR CONTROLLER *USED*
UNIVERSAL DYNAMICS UDC0385 CIRCUIT BOARD *USED*
VIDEOJET HA6251800010136 *USED*
LIQUID METRONICS A111-91 *USED*
ACTION MDL4380-2000-01 *USED*
HEIDENHAIN ROD 4626180003012-0?3 *USED*
KEPCO EFX050T-1 POWER SUPPLY *USED*
HTM ELECTRONICS FCM1-1202P-ARU4 *USED*
BIMBA BF-041.156-R CYLINGER *USED*
BANNER ***2A31R *USED*
SQUARE D 31111-400-44 120V COIL *USED*
LOT OF 2 ALLEN BRADLEY 42182-800-01 *USED*
GENERAL ELECTRIC CR120A04002AA (AS PICTURED) *USED*
QUARTECH 8551 POWER SUPPLY 2.0VDC, 1.5AMP *USED*
ALLEN BRADLEY 700-BX-440A 110V *USED*
ABB S 223 K 10 A *USED*
***C VFS2120-5DZ-02 *USED*
JOHNSON CONTROLS A350PS-2C *USED*
FUJI ELECTRIC SC-2SN *USED*
SUMITOMO AF-3100 AC DRIVE AF3122-011-U *NEW*
HONEYWELL RM7840L1075 *NEW IN A BOX*
STI 44501-0500 T5009 *USED*
PHOENIX CONTACT SKBI 64/C 64 *USED*
TURCK RK 4.5T-6-RS 4.5T / S653 *USED*
INDUSTRIAL DEVICES NS3V105B-6-MP29?0-FE2 *USED*
ALLEN BRADLEY 1756-CNB SERIES D DATE CODE 06/02 *FACTOR...
FESTO MEH-5/2-1/8-L-B *USED*
SICK UE 10-3OS3D0 *USED*
WEG MOTOR 00218EP3E145TC *NEW* HP 2
LOT OF 3 WINTERS 32025B6 BIMETAL THERMOMETER *NEW IN A ...
DYNAPAR STD0001 SPEED INDICATOR *NEW IN A BOX*
FUJI ELECTRIC UM15A-C01A PC BOARD *USED*
ENDRESS HAUSER DC11TEN-AA1151H?LB1 *USED*
BURLING H-1S TEMPERATURE RANGE 50 TO 300 *USED*
AS IS XYCOM 5015T-24V OPERRATOR INTERFACE 5015-B0010000..?.
MUELLER STREAM 65N-ANI-6-1 WAFER BUTTERFLY VALVE *USED*
LOT OF 3 MILLTRONICS MSP-1 MOTION SENSING PROBE SENSOR ...
LIKA C80-Y-1024ANF-2?245L4 *USED*
PROPORTION-AIR QB1TFIC220 PRESSURE CONTROL VALVE *USED*
ROSEMOUNT SCL-C-003-M2 WATER QUALITY ANALYZER *USED*
ACME / STANDARD POWER SPWS-2436 120-240V INPUT *USED*
WEST INSTRUMENTS 2800 M2800L01T1418H1?0 *USED*
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LOT OF 4 OMRON LY2 110/120VAC *USED*
WERMA (GREEN) 641 200 00 LAMP BASE W/ BULB *USED*
MOORE INDUSTRIES IPT/4-20MA/3-15?PSIG/20PSI-FA1 [DIN] *U...
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ASTEC ACV 5N6-1 POWER SUPPLY *USED*
TB WOODS WF2 SENSORLESS VECTOR DRIVE WF2C5002-0D 575V ...
PEPPERL + FUCHS NBB5-18GM40-Z3-?V1 PROXIMITY SENSOR *USE...
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OGURD CLUTCH RNB 0.8K DC-90V *NEW OUT OF A BOX*
GE FANUC IC610MDL124A *USED*
KUHNKE 81.030.01 SOLENOID VALVE *USED*
McDONELL & MILLER 143800 *NEW IN A BOX*
KLOCKNER MOELLER ZM-6-PKZ 2 *USED*
EFECTOR LK7022 LEVEL SENSOR *USED*
IFM OT5013 *USED*
WINKLE ELECTRIC CO. 4PB 0-100 AMPS *NEW OUT OF BOX*
PEPPERL + FUCHS NBB5-18GM50-E0 *USED*
SOLA HEVI-DUTY HS22F750B *NEW IN THE BOX*
KEPCO RAX5-20K POWER SUPPLY 120/220-240V *USED*
ARROW HART AH6810G MANUAL MOTOR CONTROLLER *NEW IN A BO...
BOBST 704-1337-01 PC BOARD *USED*
ANAHEIM AUTOMATION BLD72XCE-1 *USED*
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CROUZET GNR25BCZ *NEW*
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CHROMALOX AR-519 TEMPERATURE CONTROL *NEW IN A BOX*
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JOHNSON CONTROL V46AC-10 WATER PRESSURE 150PSIG MAX.