参数资料
型号: ST72311R9T3/XXX
厂商: STMICROELECTRONICS
元件分类: 微控制器/微处理器
英文描述: 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PQFP64
封装: 14 X 14 MM, TQFP-64
文件页数: 66/152页
文件大小: 1909K
代理商: ST72311R9T3/XXX
ST72311R, ST72511R, ST72532R
20/152
4 CENTRAL PROCESSING UNIT
4.1 INTRODUCTION
This CPU has a full 8-bit architecture and contains
six internal registers allowing efficient 8-bit data
manipulation.
4.2 MAIN FEATURES
s
Enable executing 63 basic instructions
s
Fast 8-bit by 8-bit multiply
s
17 main addressing modes (with indirect
addressing mode)
s
Two 8-bit index registers
s
16-bit stack pointer
s
Low power HALT and WAIT modes
s
Priority maskable hardware interrupts
s
Non-maskable software/hardware interrupts
4.3 CPU REGISTERS
The 6 CPU registers shown in Figure 7 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)
These 8-bit registers are used to create effective
addresses or as temporary storage areas for data
manipulation. (The Cross-Assembler generates a
precede instruction (PRE) to indicate that the fol-
lowing instruction refers to the Y register.)
The Y register is not affected by the interrupt auto-
matic procedures.
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 7. CPU Registers
ACCUMULATOR
X INDEX REGISTER
Y INDEX REGISTER
STACK POINTER
CONDITION CODE REGISTER
PROGRAM COUNTER
70
1C
1I1 H I0 N Z
RESET VALUE = RESET VECTOR @ FFFEh-FFFFh
70
0
7
15
8
PCH
PCL
15
8
70
RESET VALUE = STACK HIGHER ADDRESS
RESET VALUE = 1X
11 X 1 X X
RESET VALUE = XXh
X = Undefined Value
相关PDF资料
PDF描述
ST72T311R7T7 8-BIT, OTPROM, 8 MHz, MICROCONTROLLER, PQFP64
ST72T532R4T6 8-BIT, OTPROM, 8 MHz, MICROCONTROLLER, PQFP64
ST72311R7T6/XXX 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PQFP64
ST72311R7T3/XXX 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PQFP64
ST72T511R6T7 8-BIT, OTPROM, 8 MHz, MICROCONTROLLER, PQFP64
相关代理商/技术参数
参数描述
ST72311R9T6 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:8-BIT MCU WITH NESTED INTERRUPTS, EEPROM, ADC, 16-BIT TIMERS, 8-BIT PWM ART, SPI, SCI, CAN INTERFACES
ST72311R9T6/XXX 制造商:未知厂家 制造商全称:未知厂家 功能描述:8-Bit Microcontroller
ST72311R9T6S 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:8-BIT MCU WITH NESTED INTERRUPTS, EEPROM, ADC, 16-BIT TIMERS, 8-BIT PWM ART, SPI, SCI, CAN INTERFACES
ST72311R9T6S/XXX 制造商:未知厂家 制造商全称:未知厂家 功能描述:8-Bit Microcontroller
ST72311R9T7 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:8-BIT MCU WITH NESTED INTERRUPTS, EEPROM, ADC, 16-BIT TIMERS, 8-BIT PWM ART, SPI, SCI, CAN INTERFACES