参数资料
型号: ST72E331N4D0
厂商: STMICROELECTRONICS
元件分类: 微控制器/微处理器
英文描述: 8-BIT, UVPROM, 8 MHz, MICROCONTROLLER, CDIP56
封装: 0.600 INCH, WINDOWED, CERAMIC, SDIP-56
文件页数: 15/107页
文件大小: 691K
代理商: ST72E331N4D0
15/107
ST72E331 ST72T331
2 CENTRAL PROCESSING UNIT
2.1 INTRODUCTION
This CPU has a full 8-bit architecture and contains
six internal registers allowing efficient 8-bit data
manipulation.
2.2 MAIN FEATURES
s
63 basic instructions
s
Fast 8-bit by 8-bit multiply
s
17 main addressing modes
s
Two 8-bit index registers
s
16-bit stack pointer
s
Low power modes
s
Maskable hardware interrupts
s
Non-maskable software interrupt
2.3 CPU REGISTERS
The 6 CPU registers shown in Figure 1 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 8. CPU Registers
ACCUMULATOR
X INDEX REGISTE R
Y INDEX REGISTE R
STACK POINTER
CONDITIO N CODE REGIST ER
PROGRAM COUNTER
70
1C
11H I
N Z
RESET VALUE = RESET VECTOR @ FFFEh-FFFFh
70
0
7
15
8
PCH
PCL
15
87
0
RESET VALUE = STACK HIGHER ADDRESS
RESET VALUE = 1X
11X 1X X
RESET VALUE = XXh
X = Undefined Value
15
相关PDF资料
PDF描述
ST72T331N2B6S 8-BIT, OTPROM, 8 MHz, MICROCONTROLLER, PDIP56
ST72T331J2T3S 8-BIT, OTPROM, 4 MHz, MICROCONTROLLER, PQFP44
ST72T331J4T6S 8-BIT, OTPROM, 8 MHz, MICROCONTROLLER, PQFP44
ST72T331N2T6S 8-BIT, OTPROM, 8 MHz, MICROCONTROLLER, PQFP64
ST72T331N4T6S 8-BIT, OTPROM, 8 MHz, MICROCONTROLLER, PQFP64
相关代理商/技术参数
参数描述
ST72E331N4D0S 功能描述:8位微控制器 -MCU UV EPROM 16K RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT
ST72E4K64-A75EC 制造商:STEC Inc 功能描述:512MB DDR-266 ECC/REG - Bulk
ST72E4K64ML-C06E 制造商:STEC Inc 功能描述:512MB 512MB DDR PC2700 REG/ECC
ST72E4L128ML-C06E 制造商:STEC Inc 功能描述:SimpleTech 1GB PC2700 333MHz ECC Registered DDR DIMM Memory
ST72E63-EPB/US 功能描述:程序设计器 - 基于处理器 ST7 EPROM Programmer RoHS:否 制造商:Olimex Ltd. 产品:Programmers 工具用于评估:XMEGA, MegaAVR, tinyAVR 核心:AVR 接口类型:USB 工作电源电压:1.8 V to 5.5 V