- 您現在的位置：買賣IC網 > PDF目錄370837 > M34250E2FP (Mitsubishi Electric Corporation) SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER PDF資料下載
參數資料
| 型號： | M34250E2FP |
| 廠商： | Mitsubishi Electric Corporation |
| 英文描述： | SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER |
| 中文描述： | 單芯片4位微機的CMOS |
| 文件頁數： | 12/58頁 |
| 文件大?。?/td> | 331K |
| 代理商： | M34250E2FP |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁當前第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁
MITSUBISHI
ELECTRIC
12
MITSUBISHI MICROCOMPUTERS
4250 Group
SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER
Fig. 5 Stack registers (SKs) structure
Fig. 6 Example of operation at subroutine call
SK
0
SK
1
SK
2
SK
3
(SP) = 0
(SP) = 1
(SP) = 2
(SP) = 3
Program counter (PC)
Executing RT
instruction
Executing BM
instruction
Stack pointer (SP) points “3” at reset or
returning from RAM back-up mode. It points “0”
by executing the first BM instruction, and the
contents of program counter is stored in SK
0
.
When the BM instruction is executed after four
stack registers are used ((SP) = 3), (SP) = 0
and the contents of SK
0
is destroyed.
Returning to the BM instruction execution
address with the RT instruction, and the BM
instruction is equivalent to the NOP instruction.
(SP)
(SK
0
)
(PC)
0
0001
16
SUB1
Main program
0002
16
NOP
Address
0000
16
NOP
0001
16
BM SUB1
Subroutine
SUB1 :
NOP
·
·
RT
(PC)
(SP)
(SK
0
)
3
·
Note:
(5) Stack registers (SK
s
) and stack pointer (SP)
Stack registers (SKs) are used to temporarily store the contents
of program counter (PC) just before branching until returning
to the original routine when;
branching to an interrupt service routine (referred to as an
interrupt service routine),
performing a subroutine call, or
executing the table reference instruction (TABP p).
Stack registers (SKs) are four identical registers, so that
subroutines can be nested up to 4 levels. However, one of
stack registers is used respectively when using an interrupt
service routine and when executing a table reference
instruction. Accordingly, be careful not to over the stack when
performing these operations together. The contents of registers
SKs are destroyed when 4 levels are exceeded.
The register SK nesting level is pointed automatically by 2-bit
stack pointer (SP).
Figure 5 shows the stack registers (SKs) structure.
Figure 6 shows the example of operation at subroutine call.
(6) Interrupt stack register (SDP)
Interrupt stack register (SDP) is a 1-stage register. When an
interrupt occurs, this register (SDP) is used to temporarily store
the contents of data pointer, carry flag and skip flag just before
an interrupt until returning to the original routine.
Unlike the stack registers (SKs), this register (SDP) is not used
when executing the subroutine call instruction and the table
reference instruction.
(7) Skip flag
Skip flag controls skip decision for the conditional skip
instructions and continuous described skip instructions. When
an interrupt occurs, the contents of skip flag is stored
automatically in the interrupt stack register (SDP) and the skip
condition is retained.
相關PDF資料 |
PDF描述 |
|---|---|
| M34250M2 | SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER |
| M34282M2-064GP | Aluminum Electrolytic Capacitor; Capacitor Type:Computer Grade; Voltage Rating:75VDC; Capacitor Dielectric Material:Aluminum Electrolytic; Operating Temperature Range:-40 C to C; Capacitance:68000uF RoHS Compliant: Yes |
| M34282M1 | SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER |
| M34282M2 | SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER |
| M34282 | Single Chip 4 Bits CMOS Microcomputer(4位單片機) |
相關代理商/技術參數 |
參數描述 |
|---|---|
| M34250M2 | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER |
| M34250M2-066FP | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER |
| M34250M2-086FP | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER |
| M34250M2-099FP | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER |
| M34250M2-116FP | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER |
發(fā)布緊急采購，3分鐘左右您將得到回復。