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參數(shù)資料
| 型號： | MB89P965APF |
| 廠商： | FUJITSU LTD |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, OTPROM, 10 MHz, MICROCONTROLLER, PQFP48 |
| 封裝： | 0.80 MM PITCH, PLASTIC, QFP-48 |
| 文件頁數(shù)： | 14/48頁 |
| 文件大?。?/td> | 578K |
| 代理商： | MB89P965APF |
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MB89960 Series
21
2.
Registers
The MB89960 series provides two types of registers: dedicated registers in the CPU and general-purpose
registers. The dedicated registers are as follows.
The upper 8 bits of the PS contain the register bank pointer (RP) and the lower 8 bits contain the 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 register that provides temporary storage for arithmetic operations and
similar. Instructions that operate on 8-bit data use the lower byte.
Temporary accumulator (T) : A 16-bit register used for arithmetic operations with the accumulator. Instructions
that operate on 8-bit data use the lower byte.
Index register (IX)
: A 16-bit register used for index modification.
Extra pointer (EP)
: A 16-bit pointer used for indicating a memory address .
Stack pointer (SP)
: A 16-bit register used for indicating a stack area.
Program status (PS)
: A 16-bit register used to store a register pointer and condition code.
PS
16 bits
Initial value
PC
A
T
IX
EP
SP
: Program counter
: Accumulator
: Temporary accumulator
: Index register
: Extra pointer
: Stack pointer
RP
CCR
: Program status
FFFDH
Undefined
I flag = 0, IL1, IL0 = 11
Other bits are undefined
PS
X : Undefined
Half carry flag
Interrupt enable flag
Interrupt level bits
Negative flag
Zero flag
Overflow flag
Carry flag
RP
CCR
X011XXXXB
CCR Initial value
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
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