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參數資料
| 型號： | ST72124J2T |
| 廠商： | 意法半導體 |
| 英文描述： | 8-BIT MCU WITH SINGLE VOLTAGE FLASH MEMORY, ADC, 16-BIT TIMERS, SPI, SCI INTERFACES |
| 中文描述： | 8位單電壓閃存，ADC和16位定時器，SPI和脊髓損傷界面微控制器 |
| 文件頁數： | 23/153頁 |
| 文件大?。?/td> | 1533K |
| 代理商： | ST72124J2T |
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ST72334J/N, ST72314J/N, ST72124J
23/153
8 CENTRAL PROCESSING UNIT
8.1 INTRODUCTION
This CPU has a full 8-bit architecture and contains
six internal registers allowing efficient 8-bit data
manipulation.
8.2 MAIN FEATURES
I
63 basic instructions
I
Fast 8-bit by 8-bit multiply
I
17 main addressing modes
I
Two 8-bit index registers
I
16-bit stack pointer
I
Low power modes
I
Maskable hardware interrupts
I
Non-maskable software interrupt
8.3 CPU REGISTERS
The 6 CPU registers shown in
Figure 10
are not
present in the memory mapping and are accessed
by specific instructions.
Accumulator (A)
The Accumulator is an 8-bit general purpose reg-
ister used to hold operands and the results of the
arithmetic and logic calculations and to manipulate
data.
Index Registers (X and Y)
In indexed addressing modes, these 8-bit registers
are used to create either effective addresses or
temporary storage areas for data manipulation.
(The Cross-Assembler generates a precede in-
struction (PRE) to indicate that the following in-
struction refers to the Y register.)
The Y register is not affected by the interrupt auto-
matic procedures (not pushed to and popped from
the stack).
Program Counter (PC)
The program counter is a 16-bit register containing
the address of the next instruction to be executed
by the CPU. It is made of two 8-bit registers PCL
(Program Counter Low which is the LSB) and PCH
(Program Counter High which is the MSB).
Figure 10. CPU Registers
ACCUMULATOR
X INDEX REGISTER
Y INDEX REGISTER
STACK POINTER
CONDITION CODE REGISTER
PROGRAM COUNTER
7
1
0
C
1
1 H I
N Z
RESET VALUE = RESET VECTOR @ FFFEh-FFFFh
7
0
7
0
7
0
0
7
15
8
PCH
PCL
15
8
7
0
RESET VALUE = STACK HIGHER ADDRESS
RESET VALUE = 1
X
1 1 X 1 X X
RESET VALUE = XXh
RESET VALUE = XXh
RESET VALUE = XXh
X = Undefined Value
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相關代理商/技術參數 |
參數描述 |
|---|---|
| ST72124J2T1 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:8-BIT MCU WITH SINGLE VOLTAGE FLASH MEMORY, ADC, 16-BIT TIMERS, SPI, SCI INTERFACES |
| ST72124J2T1/XXX | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:8-BIT MCU WITH SINGLE VOLTAGE FLASH MEMORY, ADC, 16-BIT TIMERS, SPI, SCI INTERFACES |
| ST72124J2T3 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:8-BIT MCU WITH SINGLE VOLTAGE FLASH MEMORY, ADC, 16-BIT TIMERS, SPI, SCI INTERFACES |
| ST72124J2T3/XXX | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:8-BIT MCU WITH SINGLE VOLTAGE FLASH MEMORY, ADC, 16-BIT TIMERS, SPI, SCI INTERFACES |
| ST72124J2T6 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:8-BIT MCU WITH SINGLE VOLTAGE FLASH MEMORY, ADC, 16-BIT TIMERS, SPI, SCI INTERFACES |
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