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ST52T301P データシート(PDF) 8 Page - STMicroelectronics

部品番号 ST52T301P
部品情報  8-Bit OTP/EPROM DuaLogic] MCUs WITH ADC, UART, TIMER, TRIAC & PWM DRIVER
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メーカー  STMICROELECTRONICS [STMicroelectronics]
ホームページ  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST52T301P データシート(HTML) 8 Page - STMicroelectronics

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It is not possibile to stop the fuzzy inference before
the end of the defuzzificationof one output.Aset of
26 different arithmetic and logic instructions is
available.Each instruction requiresfrom 4 to 7 clock
pulses to be performed.
2.1.1 Program Counter
The Program Counter (PC) is a 11-bit register that
contains the address of the next memory location
to be processed by the core. This memory location
may be an opcode,an operand or an address of an
operand.
The 11-bit length allows the direct addressing
mode of 2048 bytes in the program space.
After having read the current instruction address,
the PC value is incremented. To execute relative
jumps the PC and the offset are shifted through the
Fuzzy Core or the ALU, where they will be added.
The result of this operation is shifted back into the
PC.
The PC can be changed in the following ways:
JP (Jump) instruction PC = Jump Address
Interrupt
PC = Interrupt Vector
RETI instruction
PC = Pop (stack)
Reset
PC = Reset Vector
Normal Instruction
PC = PC + 1
2.1.2 Flags
The ST52x301 core includes two pairs of flags that
correspond to 2 different modes: normal mode and
interrupt mode. Each pair consist of a CARRY flag
and a ZERO flag. One pair (CN, ZN) is used during
normal operation and one is used during the
interrupt mode (CI, ZI).
The ST52x301 core uses the pair of flags that
correspond to the actual mode: as soon as an
interrupt is generated, the ST52x301 core uses the
interrupt flags instead of the normal flags.When the
RETI instruction is executed the normal flags are
restored if the MCU was in the normal mode before
the interrupt. It should be observed that each flag
set can only be addressed in its own routine.
The flags are not cleared during the context
switching and remain in the state they were at the
exit of the last routine switching.
The Carry flag is set when a carry or a borrow
occurs during arithmetic operations, otherwise it is
cleared.
The switching between the two sets of flags is
automatically performed when an interrupt or a
RETI instruction occur.
2.2 ADDRESS SPACES
W.A.R.P3TC has four separate address spaces:
Register File: 16 8-bit registers
Input Registers: 11 8-bit registers
Configuration Registers: 16 8-bit registers
Peripheral Registers: 3 8-bit registers
Program memory up to 2K Bytes
The Program memory will be described in further
detail in the MEMORYsection
2.2.1 Register File
The Register File (RF) consists of 16 general
purpose 8-bit registers Reg0 to Reg15.
All the registers in the RF can be specified by using
a decimal address,
e.g. 0 identify the first register of the RF, called
Reg0.
Reg0:3 are directly connected to the FC input. It
means that the input values of the fuzzy algorithm
must be loaded into these registers by the user.
These registers are used as temporary registers
during the macros’ computation.
8/99
ST52T301/E301


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