Register Architecture - Samsung S3C80A5B User Manual

S3C80A5B

REGISTER ARCHITECTURE

The S3C80A5B register file has 312 registers. The upper 64 bytes register files are addressed as system control
register and working register. The lower 192-byte area of the physical register file(00H–BFH) contains freely-
addressable, general-purpose registers called prime registers. It can be also used for stack operation.
The extension of register space into separately addressable sets is supported internally by addressing mode
restrictions.
Specific register types and the area (in bytes) they occupy in the S3C80A5B internal register space are
summarized in Table 2-1.
General-purpose registers (including the 16-byte
common working register area, the 256-byte prime
register area.)
CPU and system control registers
Mapped clock, peripheral, and I/O control and data
registers
Total Addressable Bytes
Table 2-1. S3C80A5B Register Type Summary
Register Type
ADDRESS SPACES
Number of Bytes
272
18
22
312
2-3