- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄370838 > M34570M4-214FP (Mitsubishi Electric Corporation) SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER PDF資料下載
參數(shù)資料
| 型號： | M34570M4-214FP |
| 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(shù)： | 18/68頁 |
| 文件大小： | 319K |
| 代理商： | M34570M4-214FP |
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頁第12頁第13頁第14頁第15頁第16頁第17頁當(dāng)前第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頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁第68頁
18
MITSUBISHI MICROCOMPUTERS
4570 Group
SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER
(1) External 0 interrupt request flag (EXF0)
External 0 interrupt request flag (EXF0) is set to “1” when a
valid waveform is input to P2
1
/INT pin.
The valid waveforms causing the interrupt must be retained
at their level for 4 cycles or more of the system clock (Refer
to Figure 16).
The state of EXF0 flag can be examined with the skip
instruction (SNZ0). Use the interrupt control register V1 to
select the interrupt or the skip instruction. The EXF0 flag is
cleared to “0” when an interrupt occurs or when the next
instruction is skipped with the skip instruction.
The P2
1
/INT pin need not be selected the external interrupt
input INT function or the normal input port P2
1
function.
However, the EXF0 flag is set to “1” when a valid waveform
is input to P2
1
/INT pin even if it is used as an input port P2
1
.
G
External 0 interrupt activated condition
External 0 interrupt activated condition is satisfied when a
valid waveform is input to P2
1
/INT pin.
The valid waveform can be selected from rising waveform or
falling waveform. An example of how to use the external 0
interrupt is as follows.
Select the valid waveform with the bit 2 of register I1.
Clear the EXF0 flag to “0” with the SNZ0 instruction.
Set the NOP instruction for the case when a skip is performed
with the SNZ0 instruction.
Set both the external 0 interrupt enable bit (V1
0
) and the
INTE flag to “1.”
The external 0 interrupt is now enabled. Now when a valid
waveform is input to the P2
1
/INT pin, the EXF0 flag is set to
“1” and the external 0 interrupt occurs.
(2) External interrupt control register
G
Interrupt control register I1
Register I1 controls the valid waveform for the external 0
interrupt, the return level (valid level of wakeup signal) from
the RAM back-up and P2
1
/INT pin function. Set the contents
of this register through register A with the TI1A instruction.
The TAI1 instruction can be used to transfer the contents of
register I1 to register A.
Table 8 External interrupt control register
Notes 1: “R” represents read enabled, and “W” represents write enabled.
2: Depending on the input state of P2
1
/INT pin, the external interrupt request flag EXF0 may be set to “1” when the contents
of I1
2
is changed. Accordingly, set a value to bit 2 of register I1 and execute the SNZ0 instruction to clear the EXF0 flag after
executing at least one instruction.
I1
3
I1
2
I1
1
I1
0
Not used
Interrupt valid waveform for INT pin/return
level selection bit (Note 2)
Not used
Not used
0
1
0
1
0
1
0
1
This bit has no function, but read/write is enabled.
Falling waveform (“L” level of INT pin is recognized with the SNZI0
instruction)/“L” level
Rising waveform (“H” level of INT pin is recognized with the SNZI0
instruction)/“H” level
This bit has no function, but read/write is enabled.
This bit has no function, but read/write is enabled.
Interrupt control register I1
R/W
at reset : 0000
2
at RAM back-up : state retained
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| M34570M4-227FP | SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER |
| M34570M4-302FP | SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER |
| M35045-054SP | SCREEN CHARACTER and PATTERN DISPLAY CONTROLLERS |
| M35045-062SP | SCREEN CHARACTER and PATTERN DISPLAY CONTROLLERS |
| M35045-066SP | CAP DOUBLE LAYER 4.7F 2.5V COIN |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| M34570M4-227FP | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER |
| M34570M4-302FP | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER |
| M34570M4-XXXFP | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER |
| M34570M8 | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER |
| M34570M8-117FP | 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(fù)。