Description
PIC18F66J55 introduces a new line of low-voltage USB microcontrollers with the main traditional advantage of all PIC18 microcontrollers – namely, high computational performance and a rich feature set – at an extremely competitive price point. These features make the PIC18F87J10 family a logical choice for many high-performance applications, where cost is a primary consideration. All of the devices in the PIC18F87J10 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 Devices in the PIC18F87J10 family incorporate a fully-featured Universal Serial Bus communications module with a built-in transceiver that is compliant with the USB Specification Revision 2.0. The module supports both low-speed and full-speed communication for all supported data transfer types. All of the devices in the PIC18F87J10 family offer five 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. An internal oscillator block which provides an 8 MHz clock and an INTRC source (approximately 31 kHz, stable over temperature and VDD), 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 an oscillator pin for use as an additional general purpose I/O. A Phase Lock Loop (PLL) frequency multiplier, available to the high-speed crystal, external oscillator and internal oscillator, providing a clock speed up to 48 MHz. Dual clock operation, allowing the USB module to run from a high-frequency oscillator while the rest of the microcontroller is clocked at a different frequency. 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.
- Universal Serial Bus Features:
- USB V2.0 Compliant SIE
- Low Speed (1.5 Mb/s) and Full Speed (12 Mb/s)
- Supports Control, Interrupt, Isochronous and Bulk Transfers
- Supports up to 32 Endpoints (16 bidirectional)
- 3.9-Kbyte Dual Access RAM for USB
- On-Chip USB Transceiver Flexible Oscillator Structure:
- High-Precision PLL for USB
- Two External Clock modes, up to 48 MHz
- Internal 31 kHz Oscillator, Tunable Internal Oscillator, 31 kHz to 8 MHz
- Secondary Oscillator using Timer1 @ 32 kHz
- Fail-Safe Clock Monitor:
- Allows for safe shutdown if any clock stops
- Peripheral Highlights:
- High-Current Sink/Source 25 mA/25mA (PORTB and PORTC)
- Four Programmable External Interrupts
- Four Input Change Interrupts
- Two Capture/Compare/PWM (CCP) modules
- Three Enhanced Capture/Compare/PWM (ECCP) modules:
- One, two or four PWM outputs
- Selectable polarity
- Programmable dead time
- Auto-shutdown and auto-restart
- Two Master Synchronous Serial Port (MSSP) modules supporting 3-Wire SPI (all 4 modes) and I2C™ Master and Slave modes
- 8-Bit Parallel Master Port/Enhanced Parallel Slave Port with 16 Address Lines
- Dual Analog Comparators with Input Multiplexing
- 10-Bit, up to 12-Channel Analog-to-Digital (A/D) Converter module:
- Auto-acquisition capability
- Conversion available during Sleep
- Two Enhanced USART modules:
- Supports RS-485, RS-232 and LIN 1.2
- Auto-wake-up on Start bit
- Auto-Baud Detect External Memory Bus (80-pin devices only):
- Address Capability of up to 2 Mbytes
- 8-Bit or 16-Bit Interface
- 12-Bit, 16-Bit and 20-Bit Addressing modes Special Microcontroller Features:
- 5.5V Tolerant Inputs (digital-only pins)
- Low-Power, High-Speed CMOS Flash Technology
- C Compiler Optimized Architecture for Re-Entrant Code
- Power Management Features:
- Run: CPU on, peripherals on
- Idle: CPU off, peripherals on
- Sleep: CPU off, peripherals off
- Priority Levels for Interrupts
- Self-Programmable under Software Control
- 8 x 8 Single-Cycle Hardware Multiplier
- Extended Watchdog Timer (WDT):
- Programmable period from 4 ms to 131s
- Single-Supply In-Circuit Serial Programming™ (ICSP™) via Two Pins
- In-Circuit Debug (ICD) with 3 Breakpoints via Two Pins
- Operating Voltage Range of 2.0V to 3.6V
- On-Chip 2.5V Regulator
- Flash Program Memory of 10000 Erase/Write Cycles and 20-Year Data Retention
