st52f513 STMicroelectronics, st52f513 Datasheet - Page 19

• Manufacturer Part Number: st52f513
• Description: 8-bit Microcontrollers
• Manufacturer: STMicroelectronics

2 INTERNAL ARCHITECTURE
ST52F510/F513’s architecture is Register File
based and is composed of the following blocks and
peripherals:
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Figure 2.1 CU Block Diagram
Control Unit (CU)
Data Processing Unit (DPU)
Decision Processor (DP)
ALU
Memory Interface
up to 256 bytes Register File
Program/Data Memory
Data EEPROM
Interrupts Controller
Clock Oscillator
PLVD and POR
Digital I/O ports
Analog Multiplexer and A/D Converter
Timer/PWMs
SPI
SCI
I
2
C
MicroCode
Clock Master
A
R
B
T
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I
Decision Processor
Instruction Set
Loading
Instruction Set
Logic Arithmetic
Instruction Set
Jump
Instruction Set
Control
Instruction Set
2.1 Control Unit and Data Processing Unit
The Control Unit (CU) decodes the instructions
stored in the Program Memory and generates the
appropriate control signals. The main parts of the
CU are illustrated in
The five different parts of the CU manage Loading,
Logic/Arithmetic, Jump, Control and the Fuzzy
instruction set.
The block called “Collector” manages the signals
deriving from the different parts of the CU. The
collector defines the signals for the Data
Processing Unit (DPU) and Decision Processor
(DP), as well as for the different peripherals of the
ICU.
The block called “Arbiter” manages the different
parts of the CU, so that only one part of the system
is activated during working mode.
The CU structure is extremely flexible and was
designed with the purpose of easily adapting the
core of the microcontroller to market needs. New
instruction sets or new peripherals can easily be
included without changing the structure of the
microcontroller, maintaining code compatibility.
A set of 107 different instructions is available. Each
instruction requires a number of clock pulses to be
performed that depends on the complexity of the
instruction itself. The clock pulses to execute the
instructions are driven directly by the masterclock,
which has the same frequency of the oscillator
signal supplied.
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Figure
Signals
Control
ST52510xx ST52513xx
2.1.
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