CYWUSB6953_10 datasheet(16/68 Pages) CYPRESS

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CYRF69103

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12.5 Destination Indexed

The result of an instruction using this addressing mode is placed

within either the RAM memory space or the register space.

Operand 1 is added to the X register forming the address that

points to the location of the result. The source for the instruction

is the A register. Arithmetic instructions require two sources; the

second source is the location specified by Operand 1 added with

the X register. Instructions using this addressing mode are two

bytes in length.

Example

12.6 Destination Direct Source Immediate

The result of an instruction using this addressing mode is placed

within either the RAM memory space or the register space.

Operand 1 is the address of the result. The source for the

instruction is Operand 2, which is an immediate value. Arithmetic

instructions require two sources; the second source is the

location specified by Operand 1. Instructions using this

addressing mode are three bytes in length.

Examples

12.7 Destination Indexed Source Immediate

The result of an instruction using this addressing mode is placed

within either the RAM memory space or the register space.

Operand 1 is added to the X register to form the address of the

result. The source for the instruction is Operand 2, which is an

immediate value. Arithmetic instructions require two sources; the

second source is the location specified by Operand 1 added with

the X register. Instructions using this addressing mode are three

bytes in length.

Examples

12.8 Destination Direct Source Direct

The result of an instruction using this addressing mode is placed

within the RAM memory. Operand 1 is the address of the result.

Operand 2 is an address that points to a location in the RAM

memory that is the source for the instruction. This addressing

mode is only valid on the MOV instruction. The instruction using

this addressing mode is three bytes in length.

Example

Table 12-5. Destination Indexed

Opcode

Operand 1

Instruction

Destination Index

ADD

[X+7],

A In this case, the value in the memory

location at address X+7 is added with

the Accumulator, and the result is

placed in the memory location at

address x+7. The Accumulator is

unchanged.

Table 12-6. Destination Direct Source Immediate

Opcode

Operand 1

Operand 2

Instruction

Destination Address

Immediate Value

ADD

[7],

5 In this case, value in the memory

location at address 7 is added to the

immediate value of 5, and the result is

placed in the memory location at

address 7.

MOV REG[8],

6 In this case, the immediate value of 6

is moved into the register space

location at address 8.

Table 12-7. Destination Indexed Source Immediate

Opcode

Operand 1

Operand 2

Instruction

Destination Index

Immediate Value

ADD

[X+7],

In this case, the value in the

memory location at address X+7

is added with the immediate

value of 5 and the result is placed

in the memory location at

address X+7.

MOV

REG[X+8],

In this case, the immediate value

of 6 is moved into the location in

the register space at address

X+8.

Table 12-8. Destination Direct Source Direct

Opcode

Operand 1

Operand 2

Instruction

Destination Address

Source Address

MOV

[7],

[8] In this case, the value in the memory

location at address 8 is moved to the

memory location at address 7.

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