Description
This family offers the advantages of all PIC18 microcontrollers – namely, high computational performance at an economical price – with the addition of high-endurance Enhanced Flash program memory. The PIC18F6525/6621/8525/8621 family also provides an enhanced range of program memory options and versatile analog features that make it ideal for complex, high performance applications. Key Features EXPANDED MEMORY The PIC18F6525/6621/8525/8621 family provides ample room for application code and includes members with 48 Kbytes or 64 Kbytes of code space. Other memory features are: Data RAM and Data EEPROM: The PIC18F6525/ 6621/8525/8621 family also provides plenty of room for application data. The devices have 3840 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. EXTERNAL MEMORY INTERFACE In the unlikely event that 64 Kbytes of program memory is inadequate for an application, the PIC18F8525/8621 members of the family also implement an external memory interface. This allows the controller’s internal program counter to address a memory space of up to 2 MBytes, permitting a level of data access that few 8-bit devices can claim. With the addition of new operating modes, the external memory interface offers many new options, including: Operating the microcontroller entirely from external memory Using combinations of on-chip and external memory, up to the 2-Mbyte limit Using external Flash memory for reprogrammable application code or large data tables Using external RAM devices for storing large amounts of variable data EASY MIGRATION Regardless of the memory size, all devices share the same rich set of peripherals, allowing for a smooth migration path as applications grow and evolve. The consistent pinout scheme used throughout the entire family also aids in migrating to the next larger device. This is true when moving between the 64-pin members, between the 80-pin members, or even Jumping From 64-pin To 80-pin Devices. OTHER SPECIAL FEATURES Communications: The PIC18F6525/6621/8525/ 8621 family incorporates a range of serial communication peripherals, including 2 independent Enhanced USARTs and a Master SSP module capable of both SPI and I2C (Master and Slave) modes of operation. Also, for PIC18F6525/6621/8525/8621 devices, one of the general purpose I/O ports can be reconfigured as an 8-bit Parallel Slave Port for direct processor to processor communications. CCP Modules: All devices in the family incorporate two Capture/Compare/PWM (CCP) modules and three Enhanced CCP (ECCP) modules to maximize flexibility in control applications. Up to four different time bases may be used to perform several different operations at once. Each of the three ECCPs offer up to four PWM outputs, allowing for a total of 12 PWMs. The ECCPs also offer many beneficial features, including polarity selection, Programmable Dead Time, Auto-Shutdown and Restart and Half-Bridge and Full-Bridge Output modes. Analog Features: All devices in the family feature 10-bit A/D converters with up to 16 input channels, as well as the ability to perform conversions during Sleep mode and auto-acquisition conversions. Also included are dual analog comparators with programmable input and output configuration, a programmable Low-Voltage Detect module and a Programmable Brown-out Reset module.
- High Performance RISC CPU:
- Linear program memory addressing to 64 Kbytes
- Linear data memory addressing to 4 Kbytes
- 1 Kbyte of data EEPROM
- Up to 10 MIPs operation:
- DC – 40 MHz osc./clock input
- 4 MHz – 10 MHz osc./clock input with PLL active
- 16-bit wide instructions, 8-bit wide data path
- Priority levels for interrupts
- 31-level, software accessible hardware stack
- 8 x 8 Single-cycle Hardware Multiplier
- Peripheral Features:
- High current sink/source 25 mA/25 mA
- Four external interrupt pins
- Timer0 module: 8-bit/16-bit timer/counter
- Timer1 module: 16-bit timer/counter
- Timer2 module: 8-bit timer/counter
- Timer3 module: 16-bit timer/counter
- Timer4 module: 8-bit timer/counter
- Secondary oscillator clock option – Timer1/Timer3
- 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: 1 to 10-bit PWM resolution
- Three Enhanced Capture/Compare/PWM (ECCP) modules:
- Same Capture/Compare features as CCP
- One, two or four PWM outputs
- Selectable polarity
- Programmable dead time
- Auto-Shutdown on external event
- Auto-Restart
- Master Synchronous Serial Port (MSSP) module with two modes of operation:
- 2/3/4-wire SPI™ (supports all 4 SPI modes)
- I2C™ Master and Slave mode
- Two Enhanced USART modules:
- Supports RS-485, RS-232 and LIN 1.2
- Auto-Wake-up on Start bit
- Auto-Baud Rate Detect
- Parallel Slave Port (PSP) module
- External Memory Interface (PIC18F8525/8621 Devices Only):
- Address capability of up to 2 Mbytes
- 16-bit interface
- Analog Features:
- 10-bit, up to 16-channel Analog-to-Digital Converter (A/D):
- Auto-Acquisition
- Conversion available during Sleep
- Programmable 16-level Low-Voltage Detection (LVD) module:
- Supports interrupt on Low-Voltage Detection
- Programmable Brown-out Reset (BOR)
- Dual analog comparators:
- Programmable input/output configuration
- Special Microcontroller Features:
- 100,000 erase/write cycle Enhanced Flash program memory typical
- 1,000,000 erase/write cycle Data EEPROM memory typical
- 1 second programming time
- Flash/Data EEPROM Retention: > 100 years
- Self-reprogrammable under software control
- Power-on Reset (POR), Power-up Timer (PWRT) and Oscillator Start-up Timer (OST)
- Watchdog Timer (WDT) with its own On-Chip RC Oscillator for reliable operation
- Programmable code protection
- Power-saving Sleep mode
- Selectable oscillator options including:
- 4x Phase Lock Loop (PLL) – of primary oscillator
- Secondary Oscillator (32 kHz) clock input
- In-Circuit Serial Programming™ (ICSP™) via two pins
- MPLAB® In-Circuit Debug (ICD 2) via two pins
- CMOS Technology:
- Low power, high-speed Flash technology
- Fully static design
- Wide operating voltage range (2.0V to 5.5V)
- Industrial and Extended temperature ranges
