Samsung S3F80JB Manuel D’Utilisation
S3F80JB
ADDRESS
SPACE
2-1
2
ADDRESS SPACE
OVERVIEW
The S3F80JB
microcontroller has two types of address space:
— Internal program memory (Flash memory)
— Internal
register
file
A 16-bit address bus supports program memory operations. A separate 8-bit register bus carries addresses and
data between the CPU and the register file.
data between the CPU and the register file.
The S3F80JB has a programmable internal 64-Kbytes Flash ROM. An external memory interface is not
implemented.
implemented.
There are 333 mapped registers in the internal register file. Of these, 272 are for general-purpose use. ( This
number includes a 16-byte working register common area that is used as a “scratch area” for data operations, a
192-byte prime register area, and a 64-byte area (Set 2) that is also used for stack operations). Twenty-two 8-bit
registers are used for CPU and system control and 39 registers are mapped peripheral control and data registers.
number includes a 16-byte working register common area that is used as a “scratch area” for data operations, a
192-byte prime register area, and a 64-byte area (Set 2) that is also used for stack operations). Twenty-two 8-bit
registers are used for CPU and system control and 39 registers are mapped peripheral control and data registers.