PIC18F8721中文資料微芯科技數(shù)據(jù)手冊PDF規(guī)格書

Power Managed Modes:

? Run: CPU on, peripherals on

? Idle: CPU off, peripherals on

? Sleep: CPU off, peripherals off

? 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, up to 40 MHz

? 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 shutdown if peripheral clock stops

External Memory Interface

(PIC18F8625/8721 only):

? Address capability of up to 2 Mbytes

? 8-bit or 16-bit interface

Peripheral Highlights:

? High current sink/source 25 mA/25 mA

? 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

? Two Enhanced Addressable USART modules:

- Supports RS-485, RS-232 and LIN 1.2

- RS-232 operation using internal oscillator block

(no external crystal required)

- Auto-wake-up on Start bit

- Auto-baud detect

? 10-bit, up to 16-channel Analog-to-Digital Converter

module (A/D)

- 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

? 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