S3C8639 View Datasheet(PDF) - Samsung

Part Name

Description

View to exact match

S3C8639

8-bit single-chip CMOS microcontrollers

Samsung 

S3C8639/C863A/P863A/C8647/F8647

ADDRESS SPACES

PRIME REGISTER SPACE

The lower 192 bytes of the 256-byte physical internal register file (00H–BFH) is called the prime register space,

or more simply, the prime area. You can access registers in this address range at all page using any of the seven

explicit addressing modes (see chapter 3, "Addressing Modes"). All registers in the prime area can be addressed

immediately after a reset.

FFH

FCH

E0H

DFH

CFH

C0H

Set 1

Page 0

Page 1

Page 2

Page 3

(S3C863A only)

FFH

FFH

Set 2

Set 2 Set 2 Set 2

C0H

BFH

C0H

BFH

Register pointers RP0 and RP1 point to the

common working register area, locations

C0H-CFH, after a reset.

RP0 = 1 1 0 0 0 0 0 0

~

Prime

Area

~

~~ ~ ~

Prime

Area

Prime Prime

Area Area

RP1 = 1 1 0 0 1 0 0 0

00H

00H

Figure 2-5. Set 1, Set 2, and Prime Area Register Map (S3C863X)

2-7

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