At the core of the 68HC12 is CPU12, a high-speed bit evolution of the on our 68HC16 and microcontrollers replaces conventional debug modes. Chapter topics cover an introduction to the 68HC12, 68HC12 assembly language programming, 68HC12 Microcontroller: Theory and Applications, Volume 1. Block diagram of the HCS12 9S12 microcontroller showing its timing and 9S12 , HCS12, 68HC12, 68HCS12, MC9S12A, MC9S12DP, Freescale 16 Bit.
|Published (Last):||5 April 2004|
|PDF File Size:||12.62 Mb|
|ePub File Size:||9.68 Mb|
|Price:||Free* [*Free Regsitration Required]|
The 68HC12 fully supports all internal registers, instructions, addressing modes, and operating modes of the 68HC Additional features and benefits include: Devices operate from 3. Low-power operation is achieved through: Mircocontroller enhanced, patented version of the Background Debug Mode found on our 68HC16 and microcontrollers replaces conventional debug modes.
It also allows FLASH re-programmability in the field for diagnostics and upgrades of customer end products. In addition, fast termination is assured with single-cycle access speed, and an optional 1 to 2 Kbytes of protected boot block is available.
This innovative, bit wide memory subsystem offers many benefits, including: This integrated non-volatile memory solution enables: Storage of calibration information Self-adjusting or self-adapting systems Data logging for historical or secure data Jump tables and code patches High Performance Timer The 68HC12 timer provides flexibility, performance, and ease of use.
The system is based on a free-running, bit counter with a programmable prescaler, overflow interrupt, and separate function interrupts. Additional M68HC12 timer features include: Multiple timer channels Each channel configurable for either input capture or output compare functions Real-time periodic interrupts Computer Operating Properly COP watchdog protection against software failures Pulse accumulator for external event counting or gated time accumulation An optional PWM microcontrolldr up to four channels and up to bit PWM outputs Optional event counter system for advanced timing operations Analog-to-Digital Converter ADC The ADC periodically samples external analog 68hc1 and produces corresponding digital values.
Typical applications are measuring analog inputs like battery voltage, temperature, pressure, and fluid levels. The SCI can be used for communications between the microcontroller and a terminal, a computer, or in network of microcontrollers.
Several major auto microcontrollre are either currently using CAN networks in their vehicles or are developing them for future vehicles. In addition, CAN is becoming very popular for use in factory-floor automation-type industrial networks.
Freescale 68HC12 – Wikipedia
Implementation of CAN version 2 parts A and B Standard bit and extended bit data frames 0 to 8 bytes data length Programmable bit rate up to 1 Mbps Support for remote frames Double buffered receive Triple buffered transmit with internal prioritization using a “local priority” concept Flexible maskable identifier filter supports alternatively two full size extended identifier filter, four bit filters, or eight 8-bit filters Programmable wakeup functionality with integrated low-pass filter Programmable loopback mode supports self-test Separate signaling and interrupt capabilities for all CAN receiver and transmitter error states warning, error passive, bus-off Programmable MSCAN clock source either the CPU bus clock or the crystal oscillator output Low-power sleep mode SAE J Byte Data Link Control Module BDLC-D The BDLC-D is an advanced serial communication multiplex bus controller operating according to the SAE J Class B protocol.
Typical applications of the BDLC module are in automobiles where multiple BDLC MCUs can communicate over a single or dual wire bus, eliminating the weight and bulk of wire harnesses and adding diagnostic capability.
SAE J compatible Some EVBs can also accommodate various types and configurations of external memory to suit a particular application’s requirements. When used with compatible debug software such as MCUez, the SDI allows users to view microckntroller modify applications on the fly – reducing development time and speeding time to market.
The MCUez toolset is designed to leverage the speed and efficient memory utilization provided by assembly language with a smart linker. Plus, the development environment’s user-friendly interface and feature set help maximize designer productivity while minimizing time-to-market.
Bundled with Motorola development hardware, the MCUez development toolset includes a configuration shell, assembler, linker, and debugger.