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  68HC11



  
This is a simple display controller. It can be controlled with a small microcontroller, such as MCS51, 68HC11, Z80, AVR and others. Several years ago, I found an article that controlling a TV with only a PIC micro controller, and I surprised to it. It is very interesting to attempt to synthesize video signal with a micro controller.
918 Popularity    0 Comments    0 Ratings
  
The MiniBoard, a Motorola 68HC11 Robot Controller board designed by Fred G. Martin, also uses this driver. The day after, I then decided to prepare the page describing how to use C-52 EVB as a robot controller board. I asked my student for competition, build yourselves robot that can track the black tape. Prize for the winner is 100 US$, with a bit condition that the winner must pay for a big party at Soi Jinda's Somtum (Papaya Salad) shop. And one of the competitor is me. I thought the rule should be conceived roughly by students and technically by me. The picture on that day will put here soon.
195 Popularity    0 Comments    0 Ratings
  
Using the circuit in Fig 1, a 68HC11 µP's stop instruction can put the µP's external RC-oscillator clock, as well as the µP itself, into a low-power mode. On receiving an interrupt, the µP will exit the stop condition and enable the RC clock. The RC clock, being a low-Q circuit, will start up immediately. Crystal oscillators, on the other hand, can waste precious milliseconds coming up to speed and stabilizing.
120 Popularity    0 Comments    0 Ratings
  
Figure 2 shows a block diagram for this sine-wave generator. You can easily analyze the generator's behavior by writing state equations in the z domain. You can also write equations in the s domain. The location of the two poles on the right-hand side reveals the generator's oscillatory nature. The inverse Laplace transformation is simple and results in a sine-wave statement.
371 Popularity    0 Comments    0 Ratings
  
There are many different microcontrollers on the market today that are being used in embedded control applications. Many of these embedded control systems need non-volatile memory. Because of their small footprint, byte level flexibility, low I/O pin requirement, low power consumption and low cost, Serial EEPROMs are a popular choice for non-volatile storage.
94 Popularity    0 Comments    0 Ratings
  
Using the circuit in Fig 1, a 68HC11 µP's stop instruction can put the µP's external RC-oscillator clock, as well as the µP itself, into a low-power mode. On receiving an interrupt, the µP will exit the stop condition and enable the RC clock. The RC clock, being a low-Q circuit, will start up immediately. Crystal oscillators, on the other hand, can waste precious milliseconds coming up to speed and stabilizing. The external RC oscillator uses simple Schmitt-trigger CMOS inverters.
34 Popularity    0 Comments    0 Ratings
  
This algorithm uses steps in the form of n/m, where n is an integer multiplier that is not a power of 2 and m is an integer that is a number with a power of 2. Making n and m relatively independent allows you to accurately set the number of samples in one cycle. When n is larger than 255, multiplying by n using 8-bit is time consuming. This algorithm allows n to be as high as 215 and the results to be as high as 231. Division by m is easy and fast because you simply left shift the register value. The overall operating principle is to keep these values as integers to avoid using floating-point arithmetic. The resultant assembler routine is simple and fast.
41 Popularity    0 Comments    0 Ratings
  
The cross compiler works on any host supported by GNU tools (Solaris, GNU/Linux, FreeBSD, HP/UX, MacOS X, Windows,...).
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A simple schematic for 68HC11 or 68HC811 in Bootstrap-Mode. MODA and MODB = 0 Volt. The RS232-circuit has a automatic RESET-circuit. My assembler ASY.EXE send a BREAK-Signal with 110.
350 Popularity    0 Comments    0 Ratings
  
other circuits:decode, eprom ram and LCD.
245 Popularity    0 Comments    0 Ratings
  
Transmit-program in assembler 68HC11 expanded board with CAN BUS. The 68HC11 with CAN-CONTROLLER 82527 from Intel.
132 Popularity    0 Comments    1 Ratings
  
No Description available.
32 Popularity    0 Comments    0 Ratings
  
This source code is for 68HC811 with 2048 Bytes EEPROM. The board with 68HC811 must be in BOOTSTRAP-MODE.
89 Popularity    0 Comments    0 Ratings
  
This is an image Schematic. No Description available.
434 Popularity    0 Comments    0 Ratings
  
The software can load every program in the internal EEPROM (68HC11A1 and 68HC11811) and execute it step by step. The board must be in BOOTSTRAP-MODE.
189 Popularity    0 Comments    1 Ratings
  
With the HC11 board you will see all the advantages of the MC68HC11. The control of any LCD, a menustructure, the saving of data in the internal EEPROM, the application of SPI and SCI and many more. You will learn these and more using this card.
130 Popularity    0 Comments    0 Ratings
  
The Eprom emulator BYTERUNNER emulates the following Eprom types: 27C32(4K) 27C64(8K) 27C128(16K),27C256(32K)and 27C512(64K).
58 Popularity    0 Comments    0 Ratings
  
The Eprom Emulator EE16 is nothing else than two single eprom emulators connected to the same flat cable. The binary or Hex-file will be uploaded automatically to the eprom emulator EVEN and the eprom emulator ODD. The upload-time for 2 * 64k of data is absolved lesser than 1 second, witch is very fast and of course much faster than every serial-based device.
130 Popularity    0 Comments    0 Ratings
  
This is an image Schematic. No Description available.
350 Popularity    0 Comments    0 Ratings
  
The encoder is connected to PORTA PA0 and PA1 The board must be in BOOTSTRAB MODE (tested with Loggyboard).
92 Popularity    0 Comments    0 Ratings
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