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參數(shù)資料
| 型號： | MB89997PF |
| 廠商： | FUJITSU LTD |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | CONV DC-DC 24V IN 5/3.3V OUT 40W |
| 中文描述： | 8-BIT, MROM, 4.2 MHz, MICROCONTROLLER, PDSO28 |
| 封裝： | PLASTIC, SOP-28 |
| 文件頁數(shù)： | 18/42頁 |
| 文件大?。?/td> | 551K |
| 代理商： | MB89997PF |
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18
MB89990 Series
2. Registers
The F
2
MC-8L family has two types of registers; dedicated registers in the CPU and general-purpose registers
in the memory. The following dedicated registers are provided:
Program counter (PC):
A 16-bit-long register for indicating the instruction storage positions
Accumulator (A):
A 16-bit-long 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-long register which performs arithmetic operations with the accumulator.
When the instruction is an 18-bit data processing instruction, the lower byte is
used.
Index register (IX):
A 16-bit-long register for index modification
Extra pointer (EP) :
A 16-bit-long pointer for indicating a memory address
Stack pointer (SP) :
A 16-bit-long register for indicating a stack area
Program status (PS) :
A 16-bit-long register for storing a register pointer, a condition code
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).
PC
A
T
IX
EP
SP
PS
16 bits
: Program counter
: Accumulator
: Temporary accumulator
: Index register
: Extra pointer
: Stack pointer
: Program status
FFFD
H
Indeterminate
Indeterminate
Indeterminate
Indeterminate
Indeterminate
I-flag = 0, IL1, 0 = 11
The other bit values are indeterminate.
Initial value
Structure of the Program Status Register
Vacancy
H
I
IL1, 0
N
Z
V
C
5
4
RP
PS
10
9
8
7
6
3
2
1
0
15
14
13
12
11
RP
CCR
Vacancy Vacancy
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MB89997P-SH | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:8-bit Proprietary Microcontroller |
| MB8999X | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:8-bit Proprietary Microcontroller |
| MB899E | 制造商:IBase Technology (USA) Inc. 功能描述:ITX, SOCKET 478 FOR YONAH (DUAL CORE), 945GME, VGA, ICH LANX - Bulk |
| MB899FE | 制造商:IBase Technology (USA) Inc. 功能描述:ITX, SOCKET 478 FOR YONAH (DUAL CORE), 945GME, VGA, ICH LAN - Bulk |
| MB899F-MV-R | 制造商:IBase Technology (USA) Inc. 功能描述:ITX, SOCKET 478 FOR YONAH (DUAL CORE), 945GM, VGA, MARVELL 8 - Bulk |
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