Description
This family of devices contain an enhanced mid-range 8-bit CPU core. The CPU has 49 instructions. Interrupt capability includes automatic context saving. The hardware stack is 16 levels deep and has Overflow and Underflow Reset capability. Direct, Indirect, and Relative Addressing modes are available. Two File Select Registers (FSRs) provide the ability to read program and data memory. Automatic Interrupt Context Saving 16-level Stack with Overflow and Underflow File Select Registers Instruction Set Automatic Interrupt Context Saving During interrupts, certain registers are automatically saved in shadow registers and restored when returning from the interrupt. This saves stack space and user code. 16-level Stack with Overflow and Underflow These devices have an external stack memory 15 bits wide and 16 words deep. A Stack Overflow or Underflow will set the appropriate bit (STKOVF or STKUNF) in the PCON register, and if enabled will cause a software Reset. File Select Registers There are two 16-bit File Select Registers (FSR). FSRs can access all file registers and program memory, which allows one Data Pointer for all memory. When an FSR points to program memory, there is one additional instruction cycle in instructions using INDF to allow the data to be fetched. General purpose memory can now also be addressed linearly, providing the ability to access contiguous data larger than 80 bytes. There are also new instructions to support the FSRs. See Section 3.5 “Indirect Addressing” for more details. Instruction Set There are 49 instructions for the enhanced mid-range CPU to support the features of the CPU. See Section 29.0 “Instruction Set Summary” for more details.
- Special Microcontroller Features:
- 1.8V-5.5V Operation – PIC16F1825
- 1.8V-3.6V Operation – PIC16LF1825
- Self-Programmable under Software Control
- Power-on Reset (POR), Power-up Timer (PWRT) and Oscillator Start-up Timer (OST)
- Programmable Brown-out Reset (BOR)
- Extended Watchdog Timer (WDT)
- In-Circuit Serial Programming™ (ICSP™) via two pins
- In-Circuit Debug (ICD) via Two Pins
- Enhanced Low-Voltage Programming (LVP)
- Operating Voltage Range:
- 1.8V-5.5V (PIC16F1825)
- 1.8V-3.6V (PIC16LF1825)
- Programmable Code Protection
- Power-Saving Sleep mode Analog Features:
- Analog-to-Digital Converter (ADC) Module:
- 10-bit resolution, up to 12 channels
- Auto acquisition capability
- Conversion available during Sleep
- Analog Comparator Module:
- Two rail-to-rail analog comparators
- Power mode control
- Software controllable hysteresis
- Voltage Reference Module:
- Fixed Voltage Reference (FVR) with 1.024V, 2.048V and 4.096V output levels
- 5-bit rail-to-rail resistive DAC with positive and negative reference selection
