USER`S MANUAL

ADDRESS SPACES S3F80N8_UM_REV1.10

COMMON WORKING REGISTER AREA (C0H–CFH)

After a reset, register pointers RP0 and RP1 automatically select two 8-byte register slices, locations C0H–CFH, as the active 16-byte working register block:

This 16-byte address range is called common area. That is, locations in this area can be used as working registers by operations that address any location on any page in the register file. Typically, these working registers serve as temporary buffers for data operations between different pages.

FFH

FFH

Page 7

Page 6

FFH

FFH

Page 5

Page 4

FFH

FFH

FFH

FFH

Page 3

Page 2

Page 1

Page 0

FFH

FCH

E0H

D0H

C0H

Following a hardware reset, register pointers RP0 and RP1 point to the common working register area, locations C0H-CFH.

RP0 =

RP1 =

1 1 0 0 0 0 0 0

1 1 0 0 1 0 0 0

C0H

BFH

~

Page 0

Prime

Space

00H

NOTE:

In the S3F80N8 microcontrolle, only Page 0 is implemented.

Figure 2-9. Common Working Register Area

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