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| 型号： | ST62T08CM1 |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, OTPROM, 8 MHz, MICROCONTROLLER, PDSO20 |
| 封装： | 0.300 INCH, PLASTIC, SOP-20 |
| 文件页数： | 57/104页 |
| 文件大小： | 1487K |
| 代理商： | ST62T08CM1 |
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ST6208C/ST6209C/ST6210C/ST6220C
56/104
9 INSTRUCTION SET
9.1 ST6 ARCHITECTURE
The ST6 architecture has been designed for max-
imum efficiency while keeping byte usage to a
minimum; in short, to provide byte-efficient pro-
gramming. The ST6 core has the ability to set or
clear any register or RAM location bit in Data
space using a single instruction. Furthermore, pro-
grams can branch to a selected address depend-
ing on the status of any bit in Data space.
9.2 ADDRESSING MODES
The ST6 has nine addressing modes, which are
described in the following paragraphs. Three dif-
ferent address spaces are available: Program
space, Data space, and Stack space. Program
space contains the instructions which are to be ex-
ecuted, plus the data for immediate mode instruc-
tions. Data space contains the Accumulator, the X,
Y, V and W registers, peripheral and Input/Output
registers, the RAM locations and Data ROM loca-
tions (for storage of tables and constants). Stack
space contains six 12-bit RAM cells used to stack
the return addresses for subroutines and inter-
rupts.
Immediate. In immediate addressing mode, the
operand of the instruction follows the opcode loca-
tion. As the operand is a ROM byte, the immediate
addressing mode is used to access constants
which do not change during program execution
(e.g., a constant used to initialize a loop counter).
Direct. In direct addressing mode, the address of
the byte which is processed by the instruction is
stored in the location which follows the opcode. Di-
rect addressing allows the user to directly address
the 256 bytes in Data Space memory with a single
two-byte instruction.
Short Direct. The core can address the four RAM
registers X, Y, V, W (locations 80h, 81h, 82h, 83h)
in short-direct addressing mode. In this case, the
instruction is only one byte and the selection of the
location to be processed is contained in the op-
code. Short direct addressing is a subset of direct
addressing mode. (Note that 80h and 81h are also
indirect registers).
Extended. In extended addressing mode, the 12-
bit address needed to define the instruction is ob-
tained by concatenating the four least significant
bits of the opcode with the byte following the op-
code. The instructions (JP, CALL) which use ex-
tended addressing mode are able to branch to any
address in the 4 Kbyte Program space.
Extended addressing mode instructions are two
bytes long.
Program Counter Relative. Relative addressing
mode is only used in conditional branch instruc-
tions. The instruction is used to perform a test and,
if the condition is true, a branch with a span of -15
to +16 locations next to the address of the relative
instruction. If the condition is not true, the instruc-
tion which follows the relative instruction is execut-
ed. Relative addressing mode instructions are one
byte long. The opcode is obtained by adding the
three most significant bits which characterize the
test condition, one bit which determines whether it
is a forward branch (when it is 0) or backward
branch (when it is 1) and the four least significant
bits which give the span of the branch (0h to Fh)
which must be added or subtracted from the ad-
dress of the relative instruction to obtain the
branch destination address.
Bit Direct. In bit direct addressing mode, the bit to
be set or cleared is part of the opcode, and the
byte following the opcode points to the address of
the byte in which the specified bit must be set or
cleared. Thus, any bit in the 256 locations of Data
space memory can be set or cleared.
Bit Test & Branch. Bit test and branch addressing
mode is a combination of direct addressing and
relative addressing. Bit test and branch instruc-
tions are three bytes long. The bit identification
and the test condition are included in the opcode
byte. The address of the byte to be tested is given
in the next byte. The third byte is the jump dis-
placement, which is in the range of -127 to +128.
This displacement can be determined using a la-
bel, which is converted by the assembler.
Indirect. In indirect addressing mode, the byte
processed by the register-indirect instruction is at
the address pointed to by the content of one of the
indirect registers, X or Y (80h, 81h). The indirect
register is selected by bit 4 of the opcode. Register
indirect instructions are one byte long.
Inherent. In inherent addressing mode, all the in-
formation necessary for executing the instruction
is contained in the opcode. These instructions are
one byte long.
1
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ST62T08CM6 | 功能描述:8位微控制器 -MCU OTP EPROM 1K SPI/UAR 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 |
| ST62T09CB6 | 功能描述:8位微控制器 -MCU OTP EPROM 1K No Intf 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 |
| ST62T09CB6 | 制造商:STMicroelectronics 功能描述:IC 8BIT MCU OTP 2K 62T09 DIP20 |
| ST62T09CM6 | 功能描述:8位微控制器 -MCU OTP EPROM 1K No Intf 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 |
| ST62T10CB6 | 功能描述:8位微控制器 -MCU OTP EPROM 2K No Intf 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 |
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