Description
PIC18F8627 offers the advantages of all PIC18 microcontrollers – namely, high computational performance at an economical price – with the addition of highendurance, Enhanced Flash program memory. On top of these features, the PIC18F8722 family introduces design enhancements that make these microcontrollers a logical choice for many high-performance, power sensitive applications. All of the devices in the PIC18F8722 family incorporate a range of features that can significantly reduce power consumption during operation Alternate Run Modes: By clocking the controller from the Timer1 source or the internal oscillator block, power consumption during code execution can be significantly reduced. Multiple Idle Modes: The controller can also run with its CPU core disabled but the peripherals still active. In these states, power consumption can be reduced even further On-the-fly Mode Switching: The powermanaged modes are invoked by user code during operation, allowing the user to incorporate powersaving ideas into their application’s software design Low Consumption in Key Modules: The power requirements for both Timer1 and the Watchdog Timer are minimized. The PIC18F8722 family provides ample room for application code and includes members with 48, 64, 96 or 128 Kbytes of code space Data RAM and Data EEPROM: The PIC18F8722 family also provides plenty of room for application data. The devices have 3936 bytes of data RAM, as well as 1024 bytes of data EEPROM, for long term retention of nonvolatile data Memory Endurance: The Enhanced Flash cells for both program memory and data EEPROM are rated to last for many thousands of erase/write cycles, up to 100,000 for program memory and 1,000,000 for EEPROM. Data retention without refresh is conservatively estimated to be greater than 40 years. All of the devices in the PIC18F8722 family offer ten different oscillator options, allowing users a wide range of choices in developing application hardware. These include: Four Crystal modes, using crystals or ceramic resonators Two External Clock modes, offering the option of using two pins (oscillator input and a divide-by-4 clock output) or one pin (oscillator input, with the second pin reassigned as general I/O) Two External RC Oscillator modes with the same pin options as the External Clock modes An internal oscillator block which provides an 8 MHz clock and an INTRC source (approximately 31 kHz), as well as a range of 6 user selectable clock frequencies, between 125 kHz to 4 MHz, for a total of 8 clock frequencies. This option frees the two oscillator pins for use as additional general purpose I/O. A Phase Lock Loop (PLL) frequency multiplier, available to both the high-speed crystal and internal oscillator modes, which allows clock speeds of up to 40 MHz. Used with the internal oscillator, the PLL gives users a complete selection of clock speeds, from 31 kHz to 32 MHz – all without using an external crystal or clock circuit
- Power Management Features:
- Run: CPU On, Peripherals On
- Idle: CPU Off, Peripherals On
- Sleep: CPU Off, Peripherals Off
- Ultra Low 50 nA Input Leakage
- Run mode Currents Down to 25 µA Typical
- Idle mode Currents Down to 6.8 µA Typical
- Sleep mode Current Down to 120 nA Typical
- Timer1 Oscillator: 900 nA, 32 kHz, 2V
- Watchdog Timer: 1.6 µA, 2V Typical
- Two-Speed Oscillator Start-up
- Flexible Oscillator Structure:
- Four Crystal modes, up to 40 MHz
- 4x Phase Lock Loop (PLL) – Available for Crystal and Internal Oscillators
- Internal Oscillator Block: – Fast wake from Sleep and Idle, 1 µs typical – Provides a complete range of clock speeds from 31 kHz to 32 MHz when used with PLL – User-tunable to compensate for frequency drift
- Secondary oscillator using Timer1 @ 32 kHz
- Fail-Safe Clock Monitor: – Allows for safe shutdown if peripheral clock stops
- Peripheral Highlights:
- High-Current Sink/Source 25 mA/25 mA
- Three Programmable External Interrupts
- Four Input Change Interrupts
- Enhanced Capture/Compare/PWM (ECCP) module (40/44-pin devices only): – One, two or four PWM outputs – Programmable dead time – Auto-shutdown and auto-restart
- Up to 2 Capture/Compare/PWM (CCP) modules, one with Auto-Shutdown (28-pin devices)
- Master Synchronous Serial Port (MSSP) module Supporting 3-Wire SPI (all 4 modes) and I2C™ Master and Slave modes
- Enhanced Addressable USART module: – Supports RS-485, RS-232 and LIN/J2602 – RS-232 operation using internal oscillator block (no external crystal required)
- 10-Bit, up to 13-Channel Analog-to-Digital (A/D) Converter module: – Conversion available during Sleep
- Dual Analog Comparators with Input Multiplexing
- Programmable 16-Level High/Low-Voltage Detection (HLVD) module
- Special Microcontroller Features:
- C Compiler Optimized Architecture
- 100,000 Erase/Write Cycle Enhanced Flash Program Memory Typical
- 1,000,000 Erase/Write Cycle Data EEPROM Memory Typical
- Flash/Data EEPROM Retention: 100 Years Typical
- Self-Programmable under Software Control
- Priority Levels for Interrupts
- 8 x 8 Single-Cycle Hardware Multiplier
- Extended Watchdog Timer (WDT): – Programmable period from 4 ms to 131s
- Single-Supply 5V In-Circuit Serial Programming™ (ICSP™) via Two Pins
- In-Circuit Debug (ICD) via Two Pins
- Wide Operating Voltage Range: 2.0V to 5.5V
- Programmable Brown-out Reset (BOR) with Software Enable Option
