Description
PIC18F8390 offers the advantages of all PIC18 microcontrollers ñ namely, high computational performance at an economical price. In addition to these features, the PIC18F6390/6490/8390/8490 family introduces design enhancements that make these microcontrollers a logical choice for many high-performance, power-sensitive applications All of the devices in the PIC18F6390/6490/8390/8490 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 reduced by as much as 90%. 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 ñ to as little as 4% of normal operation requirements On-the-Fly Mode Switching: The power-managed modes are invoked by user code during operation, allowing the user to incorporate power-saving ideas into their applicationís software design. Lower Consumption in Key Modules: The power requirements for both Timer1 and the Watchdog Timer have been reduced by up to 80%, with typical values of 1.1 µA and 2.1 µA, respectively All of the devices in the PIC18F6390/6490/8390/8490 family offer ten different oscillator options, allowing users a wide range of choices in developing application hardware. ï Four Crystal modes using crystals or ceramic resonators. ï 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). ï Two External RC Oscillator modes with the same pin options as the External Clock modes. ï An internal oscillator block which provides an 8 MHz clock (±2% accuracy) and an INTRC source (approximately 31 kHz, stable over temperature and VDD), as well as a range of six user-selectable clock frequencies between 125 kHz to 4 MHz for a total of eight clock frequencies. This option frees the two oscillator pins for use as additional general purpose I/O. ï 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 ñ all without using an external crystal or clock circuit. Besides its availability as a clock source, the internal oscillator block provides a stable reference source that gives the family additional features for robust operation: Fail-Safe Clock Monitor: This option constantly monitors the main clock source against a reference signal provided by the internal oscillator. If a clock failure occurs, the controller is switched to the internal oscillator block, allowing for continued low-speed operation or a safe application shutdown Two-Speed Start-up: This option allows the internal oscillator to serve as the clock source from Power-on Reset or wake-up from Sleep mode until the primary clock source is available.
- LCD Driver Module Features:
- Direct Driving of LCD Panel
- Up to 48 Segments: Software Selectable
- Programmable LCD Timing module:
- Multiple LCD timing sources available
- Up to 4 commons: Static, 1/2, 1/3 or 1/4 multiplex
- Static, 1/2 or 1/3 bias configuration
- Can drive LCD Panel while in Sleep mode Power-Managed Modes:
- Run: CPU On, Peripherals On
- Idle: CPU Off, Peripherals On
- Sleep: CPU Off, Peripherals Off
- Run mode Currents Down to 14.0 µA Typical
- Idle mode Currents Down to 5.8 µA Typical
- Sleep Current Down to 0.1 µA Typical
- Timer1 Oscillator: 1.8 µA, 32 kHz, 2V
- Watchdog Timer: 2.1 µA
- Two-Speed Oscillator Start-up
- Flexible Oscillator Structure:
- Four Crystal modes:
- LP: up to 200 kHz
- XT: up to 4 MHz
- HS: up to 40 MHz
- HSPLL: 4-10 MHz (16-40 MHz internal)
- 4x Phase Lock Loop (available for crystal and internal oscillators)
- Two External RC modes, up to 4 MHz
- Two External Clock modes, up to 40 MHz
- Internal Oscillator Block:
- 8 user-selectable frequencies, from 31 kHz to 8 MHz
- 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 shut down of device if primary or secondary clock fails
- Peripheral Highlights:
- High-Current Sink/Source 25 mA/25 mA
- Four External Interrupts
- Four Input Change Interrupts
- Four 8-Bit/16-Bit Timer/Counter modules
- Real-Time Clock (RTC) Software module:
- Configurable 24-hour clock, calendar, automatic 100-year or 12800-year, day-of-week calculator
- Uses Timer1
- Up to 2 Capture/Compare/PWM (CCP) modules
- Master Synchronous Serial Port (MSSP) module supporting 3-Wire SPI (all 4 modes) and I2Cô Master and Slave modes
- Addressable USART module:
- Supports RS-485 and RS-232
- Enhanced Addressable USART module:
- Supports RS-485, RS-232 and LIN 1.2
- Auto-wake-up on Start bit
- Auto-Baud Detect
- 10-Bit, up to 12-Channel Analog-to-Digital (A/D) Converter module:
- Auto-acquisition capability
- Conversion available during Sleep
- Dual Analog Comparators with Input Multiplexing Special Microcontroller Features:
- C Compiler Optimized Architecture:
- Optional extended instruction set designed to optimize re-entrant code
- 1000 Erase/Write Cycle Flash Program Memory Typical
- Flash Retention: 100 Years Typical
- Priority Levels for Interrupts
- 8 x 8 Single-Cycle Hardware Multiplier
- Extended Watchdog Timer (WDT):
- Programmable period from 4 ms to 132s
- 2% stability over VDD and temperature
- In-Circuit Serial Programmingô (ICSPô) via Two Pins
- In-Circuit Debug (ICD) via Two Pins
- Wide Operating Voltage Range: 2.0V to 5.5V
