參數(shù)資料
型號(hào)： MB89F051PMC
廠商： FUJITSU LTD
元件分類： 微控制器/微處理器
英文描述： 8-BIT, FLASH, 12 MHz, MICROCONTROLLER, PQFP64
封裝： 12 X 12 MM, 1.70 MM HEIGHT, 0.65 MM PITCH, PLASTIC, LQFP-64
文件頁(yè)數(shù)： 8/40頁(yè)
文件大?。?/td> 931K
代理商： MB89F051PMC
MB89051 Series
16
DS07-12551-3E
2.
Registers
The MB89051 series has two types of registers; the registers dedicated to specific purposes in the CPU and
the general-purpose registers.
The dedicated registers are as follows:
The PS register can further be divided into the register bank pointer in the higher 8 bits (RP) and the condition
code register in the lower 8 bits (CCR). (See the diagram below.)
Program counter (PC)
: A 16-bit register to indicate locations where instructions are stored.
Accumulator (A)
:
A 16-bit register for temporary storage of operations. In the case of an 8-bit
data processing instruction, the lower one byte is used.
Temporary accumulator (T)
:
A 16-bit register which performs operations with the accumulator.In the case of
an 8-bit data processing instruction, the lower one byte is used.
Index register (IX)
: A 16-bit register for index modification.
Extra pointer (EP)
: A 16-bit register to point to a memory address.
Stack pointer (SP)
: A 16-bit register to indicate a stack area.
Program status (PS)
: A 16-bit register to store a register pointer or a condition code.
PS
PC
A
T
IX
EP
SP
RP
CCR
16 bits
: Program counter
: Accumulator
: Temporary accumulator
: Index register
: Extra pointer
: Stack pointer
: Program status
FFFDH
Initial value
Indeterminate
I-flag = 0, IL1, 0 = 11
Initial values for other bits are
indeterminate.
PS
RP
CCR
X011XXXXB
bit15 bit14 bit13 bit12 bit11 bit10
bit9
bit8
bit7
bit6
bit5
bit4
bit3
bit2
bit1
bit0
R4
R3
R2
R1
R0
H
I
IL1
IL0
N
Z
V
C
CCR initial value
H-flag
IL 1,0
I-flag
N-flag
Z-flag
V-flag
C-flag
X: Undefined
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