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ST62T03CN3/CCC 参数 Datasheet PDF下载

ST62T03CN3/CCC图片预览
型号: ST62T03CN3/CCC
PDF下载: 下载PDF文件 查看货源
内容描述: 微控制器\n [Microcontroller ]
分类和应用: 微控制器外围集成电路时钟
文件页数/大小: 104 页 / 649 K
品牌: ETC [ ETC ]
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ST6200C/ST6201C/ST6203C  
4 CENTRAL PROCESSING UNIT  
4.1 INTRODUCTION  
tions. The accumulator can be addressed in Data  
Space as a RAM location at address FFh. Thus  
the ST6 can manipulate the accumulator just like  
any other register in Data Space.  
The CPU Coreof ST6 devicesis independent of the  
I/O or Memory configuration. As such, it may be  
thought of as an independent central processor  
communicating with on-chip I/O, Memory and Pe-  
ripherals via internal address, data, and control  
buses.  
Index Registers (X, Y). These two registers are  
used in Indirect addressing mode as pointers to  
memory locations in Data Space. They can also  
be accessed in Direct, Short Direct, or Bit Direct  
addressing modes. They are mapped in Data  
Space at addresses 80h (X) and 81h (Y) and can  
be accessed like any other memory location.  
4.2 MAIN FEATURES  
40 basic instructions  
Short Direct Registers (V, W). These two regis-  
ters are used in Short Direct addressing mode.  
This means that the data stored in V or W can be  
accessed with a one-byte instruction (four CPU cy-  
cles). V and W can also be accessed using Direct  
and Bit Direct addressing modes. They are  
mapped in Data Space at addresses 82h (V) and  
83h (W) and can be accessed like any other mem-  
ory location.  
9 main addressing modes  
Two 8-bit index registers  
Two 8-bit short direct registers  
Low power modes  
Maskable hardware interrupts  
6-level hardware stack  
4.3 CPU REGISTERS  
Note: The X and Y registers can also be used as  
The ST6Family CPU corefeatures sixregisters and  
three pairs of flags available to the programmer.  
These are described in the following paragraphs.  
Short Direct registers in the same way as V and W.  
Program Counter (PC). The program counter is a  
12-bit register which contains the address of the  
next instruction to be executed by the core. This  
ROM location may be an opcode, an operand, or  
the address of an operand.  
Accumulator (A). The accumulator is an 8-bit  
general purpose register used in all arithmetic cal-  
culations, logical operations, and data manipula-  
Figure 7. CPU Registers  
7
0
ACCUMULATOR  
SIX LEVEL  
STACK  
RESET VALUE = xxh  
7
0
0
0
0
X INDEX REGISTER  
Y INDEX REGISTER  
RESET VALUE = xxh  
7
CN ZN  
CI ZI  
CNMI ZNMI  
NORMAL FLAGS  
INTERRUPT FLAGS  
NMI FLAGS  
RESET VALUE = xxh  
7
V SHORT INDIRECT  
REGISTER  
RESET VALUE = xxh  
7
W SHORT INDIRECT  
REGISTER  
RESET VALUE = xxh  
11  
0
PROGRAM COUNTER  
RESET VALUE = RESET VECTOR @ 0FFEh-0FFFh  
x = Undefined value  
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