Notes

Device Language Programming and taking advantage of a Microcontroller Data Book

This content is about equipment language programming and even the short op-codes and symbols that will you need in order to understand. read more is in order to get yourself the HCS08 microcontroller files book. If an individual have one, flip open to number 7-2, otherwise simply follow along plus you will become fine! I may start with the particular EXT, which indicates a prolonged address. Of which is what you should have got expected. A glance to the right of the C6 shows that the operand portion of the coaching format contains a couple of bytes indicated the above referenced you do not need : and ll. Note that all of typically the entries inside the operand field contain actually zero, one, or two twice letters. These are generally want variable name that will indicate that any value can seem in a provided instance of the particular instruction.


Only the opcode is fixed. Typically the double letter is definitely to help a person recall that each and every name means the pair of hex digits. Thus, on an actual occasion of the instruction in a program, each double notice will probably be replaced by an 8-bit benefit normally expressed as a pair of hex numbers and will also be in typically the range 00 FF. It does certainly not indicate that each hex digits must be the identical worth! The letters them selves have been chosen to help you remember the role of the operand in that particular training format. It not necessarily only tells a person there are 2 bytes (4 hex digits), but likewise the first byte may be the high-order byte as well as the second is usually the low-order byte of a 2-byte (16-bit) extended handle. The exact that means of every letter set has ceased to be given inside Rev. 5 of this manual. They have been picked to end up being mnemonic letters. 2 means two hex digits (one byte) of immediate information. dd means a couple of hex digits (one byte) of some sort of direct address. The particular complete address is found by using 00 as the first byte in the address and even the dd numbers as the second. hh and lmost all have been protected. ee is the particular most significant byte of a two-byte offset that is definitely temporarily included in the content of the H: X pair or SP to be able to form the deal with of the operand. ff is both minimal significant octet of a two-byte offset or perhaps the entire one-byte offset that will be temporarily put into the content of the H: X set or SP in order to form the tackle of the operand.

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