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PIC18LFXX39T Datasheet(PDF) 9 Page - Microchip Technology |
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PIC18LFXX39T Datasheet(HTML) 9 Page - Microchip Technology |
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9 / 322 page  2002 Microchip Technology Inc. Preliminary DS30485A-page 7 PIC18FXX39 1.0 DEVICE OVERVIEW This document contains device specific information for the following devices: This family offers the advantages of all PIC18 micro- controllers - namely, high computational performance at an economical price - with the addition of high-endur- ance Enhanced FLASH program memory. The PIC18FXX39 family also provides an off-the-shelf solu- tion for simple motor control applications, allowing users to create speed control solutions with small part counts and short development times. 1.1 Key Features 1.1.1 PROGRAMMABLE MOTOR PROCESSOR TECHNOLOGY (ProMPT™) MOTOR CONTROL The integrated motor control kernel uses on-chip Pulse Width Modulation (PWM) to provide speed control for single phase induction motors. Through a convenient set of Application Program Interfaces (APIs) and vari- able frequency technology for open loop control, users can develop applications with little or no previous expe- rience in motor control techniques. ProMPT motor con- trol provides modulated output over a range of 0 to 127 Hz, and has a pre-defined V/F curve that can be reprogrammed to suit the application. 1.1.2 OTHER PIC18FXX39 FEATURES • 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 100 years at 25°C. • Self-programmability: These devices can write to their own program memory spaces under internal software control. By using a bootloader routine located in the protected Boot Block at the top of pro- gram memory, it becomes possible to create an application that can update itself in the field. • Addressable USART: This serial communication module is capable of standard RS-232 operation using the internal oscillator block, removing the need for an external crystal (and its accompanying power requirement) in applications that talk to the outside world. • 10-bit A/D Converter: This module offers up to 8 conversion channels for flexibility in sensor monitoring and control, as well as the ability to do conversions while the device is in SLEEP mode. 1.2 Details on Individual Family Members Devices in the PIC18FXX39 family are available in 28-pin (PIC18F2X39) and 40/44-pin (PIC18F4X39) packages. Block diagrams for the two groups are shown in Figure 1-1 and Figure 1-2. The devices are differentiated from each other in four ways: 1. FLASH program memory and data RAM (12 Kbytes and 640 bytes for PIC18FX439 devices, 24 Kbytes and 1408 bytes for PIC18FX539) 2. A/D channels (5 for PIC18F2X39 devices, 8 for PIC18F4X39) 3. I/O ports (3 ports on PIC18F2X39, 5 ports on PIC18F4X39 devices) 4. Parallel Slave Port (present only on PIC18F4X39 devices) All other features for devices in this family are identical. These are summarized in Table 1-1. The pinouts for all devices are listed in Table 1-2 and Table 1-3. • PIC18F2439 • PIC18F4439 • PIC18F2539 • PIC18F4539 |
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