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PIC18F6620-IPTQTP Datasheet(PDF) 9 Page - Micrel Semiconductor |
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PIC18F6620-IPTQTP Datasheet(HTML) 9 Page - Micrel Semiconductor |
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9 / 380 page  2004 Microchip Technology Inc. DS39609B-page 7 PIC18F6520/8520/6620/8620/6720/8720 1.0 DEVICE OVERVIEW This document contains device specific information for the following devices: This family offers the same advantages of all PIC18 microcontrollers – namely, high computational performance at an economical price – with the addition of high endurance Enhanced Flash program memory. The PIC18FXX20 family also provides an enhanced range of program memory options and versatile analog features that make it ideal for complex, high-performance applications. 1.1 Key Features 1.1.1 EXPANDED MEMORY The PIC18FXX20 family introduces the widest range of on-chip, Enhanced Flash program memory available on PICmicro® microcontrollers – up to 128 Kbyte (or 65,536 words), the largest ever offered by Microchip. For users with more modest code requirements, the family also includes members with 32 Kbyte or 64 Kbyte. Other memory features are: • Data RAM and Data EEPROM: The PIC18FXX20 family also provides plenty of room for application data. Depending on the device, either 2048 or 3840 bytes of data RAM are available. All devices have 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. 1.1.2 EXTERNAL MEMORY INTERFACE In the event that 128 Kbytes of program memory is inadequate for an application, the PIC18F8X20 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 1.1.3 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. 1.1.4 OTHER SPECIAL FEATURES • Communications: The PIC18FXX20 family incorporates a range of serial communications peripherals, including 2 independent USARTs and a Master SSP module, capable of both SPI and I2C (Master and Slave) modes of operation. For PIC18F8X20 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 five Capture/Compare/PWM modules to maximize flexibility in control applications. Up to four different time bases may be used to perform several different operations at once. • 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. 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. • Self-programmability: These devices can write to their own program memory spaces under inter- nal software control. By using a bootloader routine located in the protected Boot Block at the top of program memory, it becomes possible to create an application that can update itself in the field. • PIC18F6520 • PIC18F8520 • PIC18F6620 • PIC18F8620 • PIC18F6720 • PIC18F8720 |
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