參數(shù)資料
型號: HMS38112
廠商: Electronic Theatre Controls, Inc.
英文描述: 4-BIT SINGLE CHIP MICROCOMPUTERS
中文描述: 4位單片機(jī)微機(jī)
文件頁數(shù): 40/73頁
文件大小: 505K
代理商: HMS38112
4-1
Chapter 4. Instruction
CHAPTER 4. Instruction
INSTRUCTION FORMAT
All of the 43 instruction in HMS38112/39112 is format in two fields of OP
code and operand which consist of eight bits. The following formats are available
with different types of operands.
*Format
é
All eight bits are for OP code without operand.
*Format
ê
Two bits are for operand and six bits for OP code.
Two bits of operand are used for specifying bits of RAM and X-register (bit 1 and
bit 7 are fixed at
ì
0
ì
)
*Format
Four bits are for operand and the others are OP code.
Four bits of operand are used for specifying a constant loaded in RAM or Y-
register, a comparison value of compare command, or page addressing in ROM.
*Format
ì
Six bits are for operand and the others are OP code.
Six bits of operand are used for word addressing in the ROM.
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