Register Architecture - Samsung S3C9444 User Manual

S3C9444/F9444_UM_REV1.10

REGISTER ARCHITECTURE

The upper 64-bytes of the S3C9444's internal register file are addressed as working registers, system control
registers and peripheral control registers. The lower 192-bytes of internal register file(00H–BFH) is called the
general purpose register space. 234 registers in this space can be accessed; 208 are available for general-
purpose use.
For many SAM88RCRI microcontrollers, the addressable area of the internal register file is further expanded by
additional register pages at the general purpose register space (00H–BFH: page0). This register file expansion is
not implemented in the S3C9444, however.
The specific register types and the area (in bytes) that they occupy in the internal register file are summarized in
Table 2-1.
CPU and system control registers
Peripheral, I/O, and clock control and data registers
General-purpose registers (including the 16-bit
common working register area)
Total Addressable Bytes
Table 2-1. Register Type Summary
Register Type
ADDRESS SPACES
Number of Bytes
11
15
208
234
2-5