參數(shù)資料
型號(hào)： MB89N202-PSH
廠商： FUJITSU LTD
元件分類(lèi)： 微控制器/微處理器
英文描述： 8-BIT, FLASH, 12.5 MHz, MICROCONTROLLER, PDIP32
封裝： PLASTIC, SHDIP-32
文件頁(yè)數(shù)： 8/39頁(yè)
文件大小： 557K
代理商： MB89N202-PSH
MB89201 Series
16
2. Registers
The MB89201 series has two types of registers; dedicated registers in the CPU and general-purpose registers
in the memory. The following dedicated 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 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 performs 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 register for indicating a stack area
Program status (PS) :
A 16-bit register for storing a register pointer, a condition code
PS
PC
16 bit
A
T
IX
EP
SP
RP
CCR
: 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
PS
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
H-flag
N-flag
IL1,0
I-flag
Z-flag
C-flag
V-flag
× : Undefined
Structure of the Program Status Register
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