Extract Microcontroller PIC16F874A Program from its flash and data from its eeprom, crack MCU protective mechanism and disable the security fuse bit can readout the firmware in the format of heximal from memory;
These devices have a host of features intended to maximize system reliability, minimize cost through elimination of external components, provide power saving operating modes and offer code protection when Extract Microcontroller program. These are:
- Oscillator Selection
- RESET
– Power-on Reset (POR)
– Power-up Timer (PWRT)
– Oscillator Start-up Timer (OST)
– Brown-out Reset (BOR)
- Interrupts
- Watchdog Timer (WDT)
- SLEEP
- Code Protection
- ID Locations
- In-Circuit Serial Programming
These devices have a Watchdog Timer, which can be enabled or disabled, using a configuration bit. It runs off its own RC oscillator for added reliability.
There are two timers that offer necessary delays on power-up. One is the Oscillator Start-up Timer (OST), intended to keep the chip in RESET until the crystal oscillator is stable after read Microcontroller pic12lf510 heximal.
The other is the Power-up Timer (PWRT), which provides a fixed delay of 72 ms (nominal) on power-up only. It is designed to keep the part in RESET while the power supply stabilizes, and is enabled or disabled, using a configuration bit.
With these two timers on-chip, most applications need no external RESET circuitry. In XT, LP or HS modes, a crystal or ceramic resonator is connected to the OSC1/CLKIN and OSC2/CLKOUT pins to establish oscillation (Figure 12-1) if read mcu pic12lc509a firmware.
The PIC16F7X oscillator design requires the use of a parallel cut crystal. Use of a series cut crystal may give a frequency out of the crystal manufacturers specifications.
When in HS mode, the device can accept an external clock source to drive the OSC1/CLKIN pin (Figure 12-2). See Figure 15-1 or Figure 15-2 (depending on the part number and VDD range) for valid external clock frequencies.
These capacitors were tested with the crystals listed below for basic start-up and operation. These values were not optimized.
Different capacitor values may be required to produce acceptable oscillator operation. The user should test the performance of the oscillator over the expected VDD and temperature range for the application.
