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công cụ tìm kiếm bảng dữ liệu linh kiện điện tử |
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công cụ tìm kiếm bảng dữ liệu linh kiện điện tử |
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ST20CX bảng dữ liệu(PDF) 5 Page - STMicroelectronics |
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ST20CX bảng dữ liệu(HTML) 5 Page - STMicroelectronics |
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5 / 212 page  5/212 ® 1 Introduction This manual provides a summary and reference to the ST20 instruction set for C2 and C4 cores. The instructions are listed in alphabetical order, one to a page. Descriptions are presented in a standard format with the instruction mnemonic and full name of the instruction at the top of the page, followed by these categories of information: • Code: the instruction code; • Description: a brief summary of the purpose and behavior of the instruction; • Definition: a more complete description of the instruction, using the notation described below in section 1.7; • Error signals: a list of errors and other signals which can occur; • Comments: a list of other important features of the instruction; • See also: for some instructions, a cross reference is provided to other instruc- tions with a related function. These categories are explained in more detail below, using the add instruction as an example. 1.1 Instruction name The header at the top of each page shows the instruction mnemonic and, on the right, the full name of the instruction. For primary instructions the mnemonic is followed by ‘n’ to indicate the operand to the instruction; the same notation is used in the description to show how the operand is used. 1.2 Code For secondar y instructions the instruction ‘operation code’ is shown as the memory code — the actual bytes, including any prefixes, which are stored in memory. The value is given as a sequence of bytes in hexadecimal, decoded left to right. The codes are stored in memory in ‘little-endian’ format — with the first byte at the lowest address. For primary instructions the code stored in memory is determined partly by the value of the operand to the instruction. In this case the op-code is shown as ‘Function x’ where x is the function code in the last byte of the instruction. For example, adc (add constant) is shown as ‘Function 8’. Example The entry for the add instruction is: Code:F5 |
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