S3C8639 View Datasheet(PDF) - Samsung

Part Name

Description

View to exact match

S3C8639

8-bit single-chip CMOS microcontrollers

Samsung 

ADDRESS SPACES

S3C8639/C863A/P863A/C8647/F8647

F PROGRAMMING TIP — Addressing the Common Working Register Area

As the following examples show, you should access working registers in the common area, locations C0H–CFH,

using working register addressing mode only.

Examples:

1. LD 0C2H,40H

; Invalid addressing mode!

Use working register addressing instead:

SRP #0C0H

LD R2,40H

; R2 (C2H) ← the value in location 40H

2. ADD 0C3H,#45H

; Invalid addressing mode!

Use working register addressing instead:

SRP #0C0H

ADD R3,#45H

; R3 (C3H) ← R3 + 45H

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