The 68HC08 (also abbreviated as HC08 ) is a broad family of 8-bit microcontrollers from Motorola Semiconductor (later from Freescale then NXP ).
5-528: HC08's are fully code-compatible with their predecessors, the Motorola 68HC05 . Like all Motorola processors that share lineage from the 6800 , they use the von Neumann architecture as well as memory-mapped I/O. This family has five CPU registers that are not part of the memory. One 8-bit accumulator A, a 16-bit index register H:X, a 16-bit stack pointer SP, a 16-bit program counter PC, and an 8-bit condition code register CCR. Some instructions refer to
10-505: Is a simplified, "reduced-resource" version of the HC08. The Freescale HCS08 core is the next generation of the same processors. This electronics-related article is a stub . You can help Misplaced Pages by expanding it . Motorola 68HC05 The 68HC05 (also abbreviated as HC05 ) is a broad family of 8-bit microcontrollers from Motorola Semiconductor (later Freescale then NXP ). Like all Motorola processors that share lineage from
15-549: The 6800 , they use the von Neumann architecture as well as memory-mapped I/O. This family has five CPU registers that are not part of the memory: an 8-bit accumulator A, an 8-bit index register X, an 8-bit stack pointer SP with two most significant bits hardwired to 1, a 13-bit program counter PC, and an 8-bit condition code register CCR. Among the HC05's there are several processor families, each targeted to different embedded applications. The 68HC05 family broke ground with
20-457: The different bytes in the H:X index register independently. Among the HC08's there are dozens of processor families, each targeted to different embedded applications. Features and capabilities vary widely, from 8 to 64-pin processors, from LIN connectivity to USB 1.1. A typical and general purpose device from the HC08 family of units is the microcontroller M68HC908GP32 . The Freescale RS08 core
25-503: The introduction of the EEPROM -based MC68HC805C4 and MC68HC805B6 variants in the late 1980s. Using a serial bootloader , they could be programmed in-circuit with simple software running on a PC and a low current 19 V supply (no programmer required). The HC05 series is now considered legacy and is replaced by the HC(S)08 MCU series. This microcomputer - or microprocessor -related article
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