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参数资料
| 型号： | MB89131PFM |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, MROM, 4.2 MHz, MICROCONTROLLER, PQFP48 |
| 封装： | PLASTIC, QFP-48 |
| 文件页数： | 16/52页 |
| 文件大小： | 1224K |
| 代理商： | MB89131PFM |
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MB89130/130A Series
DS07-12510-11E
23
2.
Registers
The F2MC-8L family has two types of registers; dedicated hardware registers in the CPU and general-purpose
memory registers. The following registers are provided :
The PS can further be divided into higher 8 bits for use as a register bank pointer (RP) and the lower 8 bits for
use as a condition code register (CCR) . (See the diagram below.)
Program counter (PC) :
A 16-bit register for indicating the instruction storage positions.
Accumulator (A) :
A 16-bit temporary register for storing arithmetic operations, etc. When the
instruction is an 8-bit data processing instruction, the lower byte is used.
Temporary accumulator (T) : A 16-bit register which is used for arithmetic operations with the accumulator
When the instruction is an 8-bit data processing instruction, the lower byte is
used.
Index register (IX) :
A 16-bit register for index modification
Extra pointer (EP) :
A 16-bit pointer for indicating a memory address
Stack pointer (SP) :
A 16-bit pointer for indicating a stack area
Program status (PS) :
A 16-bit register for storing a register pointer, a condition code
PC
A
T
IX
EP
SP
PS
16 bits
: Program counter
: Accumulator
: Temporary accumulator
: Index register
: Extra pointer
: Stack pointer
: Program status
FFFDH
Indeterminate
I-flag
= 0, IL1, 0 = 11
The other bit values are Indeterminate.
Initial value
Vacancy
H
I
IL1, 0
N
Z
VC
54
RP
PS
10
9876
3210
15
14
13
12
11
RP
CCR
Vacancy Vacancy
Structure of the Program Status Register
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