S3C863A 데이터 시트보기 (PDF) - Samsung

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S3C863A

8-bit single-chip CMOS microcontrollers

Samsung 

S3C8639/C863A/P863A/C8647/F8647

2 ADDRESS SPACES

ADDRESS SPACES

OVERVIEW

S3C8639/C863A/C8647 microcontrollers have two types of address space:

— Internal program memory (ROM)

— Internal register file

The 16-bit address and data bus support program memory operations. The separate 8-bit register bus carries

addresses and data between the CPU and the internal register file. S3C8639/C863A/C8647 employ an internal

32/48/24-Kbyte mask-programmable ROM. External memory interface is not implemented.

There are 852/1108/462 8-bit registers in the internal register file. In this space, there are 784/1040/400 registers

for general use, 19 for CPU and system control, and 49(43) for peripheral control and data. An area of 16-byte

common working register (scratch) is part of the general-purpose register space. Most of these registers serve as

either a source or destination address, or as accumulators for data memory operations.

2-1

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