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S3C9454B/F9454B
ADDRESS SPACES
2
ADDRESS SPACES
OVERVIEW
The S3C9454B/F9454B microcontroller has two kinds of address space:
— Internal program memory (ROM)
— Internal register file
A 12-bit address bus supports program memory operations. A separate 8-bit register bus carries addresses and
data between the CPU and the internal register file.
The S3C9454B/F9454B have 4-Kbytes of mask-programmable on-chip program memory: which is configured as
the Internal ROM mode, all of the 4-Kbyte internal program memory is used.
The S3C9454B/F9454B microcontroller has 208 general-purpose registers in its internal register file. Twenty-six
bytes in the register file are mapped for system and peripheral control functions.
2-1
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