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MSM66201/66P201/66207/66P207

ADDRESSING MODES

The MSM66201/66207 provides independent 64K-byte data and 64K-byte program space with

various types of addressing modes. These modes are shown below, for both RAM (for data space)

and ROM (for program space).

1. RAM Addressing Modes (for data space)

1.1

Register Direct Addressing

ROR

DP

DP

Example

1.2

Displacement Addressing

a) Zero Page

18H

SFR

0000H

0018H

L

A,

Example

b) Direct Page

off 10H

RAM

xx00H

xx10H

ST

A,

Example

1.3

Pointing Register (PR) Indirect Addressing

a) Data Point (DP) Indirect

RAM

[DP]

SLL

DP

Example

b) User Stack Pointer (USP) Indirect

RAM

[USP]

–128 to +127

USP

SRL 10H

Example