- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄379494 > UPD17227 (NEC Corp.) 4-BIT SINGLE-CHIP MICROCONTROLLER FOR SMALL GENERAL-PURPOSE INFRARED REMOTE CONTROL TRANSMITTER PDF資料下載
參數(shù)資料
| 型號(hào)： | UPD17227 |
| 廠商： | NEC Corp. |
| 元件分類： | 4位微控制器 |
| 英文描述： | 4-BIT SINGLE-CHIP MICROCONTROLLER FOR SMALL GENERAL-PURPOSE INFRARED REMOTE CONTROL TRANSMITTER |
| 中文描述： | 4位單片機(jī)的小型通用紅外遙控器 |
| 文件頁數(shù)： | 40/84頁 |
| 文件大?。?/td> | 393K |
| 代理商： | UPD17227 |
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頁當(dāng)前第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頁第69頁第70頁第71頁第72頁第73頁第74頁第75頁第76頁第77頁第78頁第79頁第80頁第81頁第82頁第83頁第84頁
μ
PD17225, 17226, 17227, 17228
40
Data Sheet U12643EJ2V0DS00
7.
INTERRUPT FUNCTIONS
7.1
Interrupt Sources
μ
PD17225 is provided with three interrupt sources.
When an interrupt has been accepted, the program execution automatically branches to a predetermined address,
which is called a vector address. A vector address is assigned to each interrupt source, as shown in Table 7-1.
Table 7-1. Vector Address
Priority
Interrupt Source
Ext/Int
Vector Address
1
8-bit timer
Internal
0003H
2
INT pin rising and falling edges
External
0002H
3
Basic interval timer
Internal
0001H
When more than one interrupt request is issued at the same time, the interrupts are accepted in sequence, starting
from the one with the highest priority.
Whether an interrupt is enabled or disabled is specified by the EI or DI instruction. The basic condition under which
an interrupt is accepted is that the interrupt is enabled by the EI instruction. While the DI instruction is executed, or while
an interrupt is accepted, the interrupt is disabled.
To enable accepting an interrupt after the interrupt has been processed, the EI instruction must be executed before
the RETI instruction. Accepting the interrupt is enabled by the EI instruction after the instruction next to the EI instruction
has been executed. Therefore, no interrupt can be accepted between the EI and RETI instructions.
Caution In interrupt processing, only the BCD, CMP, CY, Z, IXE flags are automatically saved to the stack
by the hardware, to a maximum of three levels. Also, within the interrupt processing contents, when
peripheral hardware (timer, A/D converter, etc. ) is accessed, the DBF and WR contents are not saved
by the hardware. Accordingly, it is recommended that at the beginning of interrupt processing DBF
and WR be saved by software to RAM, and immediately before finishing interrupt processing the
saved contents be returned to thier original location.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| UPD17227CT | 4-BIT SINGLE-CHIP MICROCONTROLLER FOR SMALL GENERAL-PURPOSE INFRARED REMOTE CONTROL TRANSMITTER |
| UPD17227MC | 4-BIT SINGLE-CHIP MICROCONTROLLER FOR SMALL GENERAL-PURPOSE INFRARED REMOTE CONTROL TRANSMITTER |
| UPD17228 | 4-BIT SINGLE-CHIP MICROCONTROLLER FOR SMALL GENERAL-PURPOSE INFRARED REMOTE CONTROL TRANSMITTER |
| UPD17228CT | 4-BIT SINGLE-CHIP MICROCONTROLLER FOR SMALL GENERAL-PURPOSE INFRARED REMOTE CONTROL TRANSMITTER |
| UPD17228GT | 4-BIT SINGLE-CHIP MICROCONTROLLER FOR SMALL GENERAL-PURPOSE INFRARED REMOTE CONTROL TRANSMITTER |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| UPD17227CT | 制造商:NEC 制造商全稱:NEC 功能描述:4-BIT SINGLE-CHIP MICROCONTROLLER FOR SMALL GENERAL-PURPOSE INFRARED REMOTE CONTROL TRANSMITTER |
| UPD17227CT-XXX | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:4-Bit Microcontroller |
| UPD17227GT | 制造商:NEC 制造商全稱:NEC 功能描述:4-BIT SINGLE-CHIP MICROCONTROLLER FOR SMALL GENERAL-PURPOSE INFRARED REMOTE CONTROL TRANSMITTER |
| UPD17227GT-XXX | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:MICROCONTROLLER|4-BIT|UPD17K CPU|CMOS|SOP|28PIN|PLASTIC |
| UPD17227MC | 制造商:NEC 制造商全稱:NEC 功能描述:4-BIT SINGLE-CHIP MICROCONTROLLER FOR SMALL GENERAL-PURPOSE INFRARED REMOTE CONTROL TRANSMITTER |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。