HT9580 datasheet(51/63 Pages) HOLTEK

51 / 63 page

Detailed Instruction Operation

The table below provides a brief description of each opcode.

The first column lists the name or the assembler mnemonic for the instruction.

The second column lists the opcode in hexadecimal.

The third column lists the address mode for the instruction.

The flags column indicates which of the 8-bit of flags are updated by the instruction.

Legend:

-® No change

® Updated

® From memory bit 6

® From memory bit 7

The number of bytes column gives the number of bytes for the opcode.

The number of cycles column gives the number of clock cycles for the opcode. (A+b indicates one addi-

tional cycle when a branch is taken within the same page, or 2 cycles if the branch is to a different

page.)

The last column are the description or brief descriptions of the opcode.

The operator notation is as follows:

assignment

2¢s complement add

2¢s complement subtract

Bitwise OR

Bitwise AND

Bitwise exclusive OR

Bitwise invert (one¢s complement)

Left rotate

Right rotate

Left shift

Right shift

Accumulator

Carry flag

X index register

Y index register

Stack pointer

Memory

HT9580

April 28, 2000

Preliminary

HT9580 Datasheet(PDF) 51 Page - Holtek Semiconductor Inc