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参数资料
| 型号： | ST72101G2B3/XXX |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, MROM, 4 MHz, MICROCONTROLLER, PDIP32 |
| 封装： | 0.400 INCH, PLASTIC, SDIP-32 |
| 文件页数： | 5/85页 |
| 文件大小： | 879K |
| 代理商： | ST72101G2B3/XXX |
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Obsolete
Product(s)
- Obsolete
Product(s)
13/85
ST72101/ST72212/ST72213
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 10. CPU Registers
ACCUMULATOR
X INDEX REGISTER
Y INDEX REGISTER
STACK POINTER
CONDITION CODE REGISTER
PROGRAM COUNTER
70
1C
11H I
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
13
相关PDF资料 |
PDF描述 |
|---|---|
| ST72101G2M1/XXX | 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PDSO28 |
| ST72101G2M6/XXX | 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PDSO28 |
| ST72212G2B6/XXX | 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PDIP32 |
| ST72212G2M3/XXX | 8-BIT, MROM, 4 MHz, MICROCONTROLLER, PDSO28 |
| ST72212G2M6/XXX | 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PDSO28 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| ST72101G2B6 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:8-BIT MCU WITH 4 TO 8K ROM/OTP/EPROM, 256 BYTES RAM, ADC, WDG, SPI AND 1 OR 2 TIMERS |
| ST72101G2B6/XXX | 制造商:未知厂家 制造商全称:未知厂家 功能描述:MICROCONTROLLER|8-BIT|ST72 CPU|CMOS|SDIP|32PIN|PLASTIC |
| ST72101G2M1 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:8-BIT MCU WITH 4 TO 8K ROM/OTP/EPROM, 256 BYTES RAM, ADC, WDG, SPI AND 1 OR 2 TIMERS |
| ST72101G2M1/XXX | 制造商:未知厂家 制造商全称:未知厂家 功能描述:8-Bit Microcontroller |
| ST72101G2M3 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:8-BIT MCU WITH 4 TO 8K ROM/OTP/EPROM, 256 BYTES RAM, ADC, WDG, SPI AND 1 OR 2 TIMERS |
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