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8051 variants may include built-in reset timers with brown-out detection, on-chip oscillators, self-programmable flash ROM program memory, built-in external RAM, extra internal program storage, bootloader code in ROM, EEPROM non-volatile data storage, I 2 C, SPI, and USB host interfaces, CAN or LIN bus, Zigbee or Bluetooth radio modules, PWM ...
The 14-bit programmable Timer/Counter was used for system single-step control. The expansion Timer/Counter was available. ROM 2 KB expandable to 4 KB with another 8755 EPROM / 16 programmable IO lines in the expansion socket. Size/weight 30.5 (W) × 25.7 (D) × 1.3 (H) cm. Documentation. User's Manual
In VLSI devices, the power-on reset (PoR) is an electronic device incorporated into the integrated circuit that detects the power applied to the chip and generates a reset impulse that goes to the entire circuit placing it into a known state.
The VX Toolset contains a set of tools for developing and troubleshooting software for the TriCore, AURIX, and AURIX 2G processors from Infineon Technologies. This package includes C/C++ compilers for the TriCore, C compilers for the Generic Timer Module (GTM), Hardware Safety Module (HSM), 8051 (SCR), and Peripheral Co-Processor (PCP ...
Also, different status registers are mapped into the SFR, for use in checking the status of the 8051, and changing some operational parameters of the 8051. Some SFR bits may be set directly using SETB/LDB instructions on the SFR's address, whereas others may require usage of specific instructions.
Manufactures a line of 8-bit 8051-compatible microcontrollers, notable for high speeds (50–100 MIPS) and large memories in relatively small package sizes. A free IDE is available that supports the USB-connected ToolStick line of modular prototyping boards. These microcontrollers were originally developed by Cygnal.
Interrupts are signals sent by hardware devices to the CPU alerting it that an event occurred to which it should react. For example, hardware timers send interrupts to the CPU at regular intervals. Most operating systems execute a HLT instruction when there is no immediate work to be done, putting the processor into an idle state.
The Intel 8253 PIT was the original timing device used on IBM PC compatibles.It used a 1.193182 MHz clock signal (one third of the color burst frequency used by NTSC, one twelfth of the system clock crystal oscillator, [1] therefore one quarter of the 4.77 MHz CPU clock) and contains three timers.