Description
PIC18F85J90 combines the traditional advantages of all PIC18 microcontrollers – namely, high computational performance and a rich feature set – with a versatile on-chip LCD driver, while maintaining an extremely competitive price point. These features make the PIC18F85J90 family a logical choice for many high-performance applications where price is a primary consideration. All of the devices in the PIC18F85J90 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 RC oscillator, 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, 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 application’s software design. All of the devices in the PIC18F85J90 family offer six different oscillator options, allowing users a range of choices in developing application hardware. These include: Two Crystal modes, using crystals or ceramic resonators. Two External Clock modes, offering the option of a divide-by-4 clock output. A Phase Lock Loop (PLL) frequency multiplier, available to the External Oscillator modes which allows clock speeds of up to 40 MHz. 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 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, 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.
- Low-Power Features:
- Power-Managed modes: Run, Idle, Sleep
- Run current down to 7 µA, typical
- Idle current down to 2.5 µA, typical
- Sleep current down to 100 nA, typical
- Fast INTOSC start-up from Sleep, 1 µs typical
- Two-Speed Oscillator Start-up reduces crystal stabilization wait time LCD Driver Module Features:
- Direct LCD Panel Drive Capability: – Can drive LCD panel while in Sleep mode
- Up to 48 Segments and 192 Pixels; 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
- Integrated Charge Pump Module with Voltage Boost Special Microcontroller Features:
- 1000 Erase/Write Cycle Flash Program Memory, Typical
- Flash Retention: 20 Years Minimum
- 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
- In-Circuit Serial Programming™ (ICSP™) via Two Pins
- In-Circuit Debug with 3 Breakpoints via Two Pins
- Operating Voltage Range: 2.0V to 3.6V
- On-Chip 2.5V Regulator Flexible Oscillator Structure:
- Two Crystal modes, 4-25 MHz
- Two External Clock modes, up to 40 MHz
- Internal Oscillator Block: – 8 user-selectable frequencies from 31.25 kHz to 8 MHz
- Secondary Oscillator using Timer1 @ 32 kHz
- Fail-Safe Clock Monitor: – Allows for safe shutdown if peripheral clock fails
- Peripheral Highlights:
- High-Current Sink/Source: 25 mA/25 mA (PORTB and PORTC)
- Sleep Current as Low as 100 nA
- Up to Four External Interrupts
- Four 8-Bit/16-Bit Timer/Counter modules: – Uses Timer1
- Two Capture/Compare/PWM (CCP) modules: – Capture is 16-bit, max. resolution 6.25 ns (TCY/16) – Compare is 16-bit, max. resolution 100 ns (TCY) – PWM output: PWM resolution is up to 10-bit
- Master Synchronous Serial Port (MSSP) module with Two Modes of Operation: – 3-wire/4-wire SPI (supports all 4 SPI modes) – I2C™ Master and Slave modes
- One Addressable USART module
- One Enhanced USART module: – Supports LIN/J2602 – Auto-wake-up on Start bit and Break character – Auto-Baud Detect
- 10-Bit, up to 12-Channel A/D Converter: – Auto-acquisition – Conversion available during Sleep
- Two Analog Comparators
- Programmable Reference Voltage for Comparators
