- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄379935 > COP8SEC520M (NATIONAL SEMICONDUCTOR CORP) 8-Bit CMOS ROM Based and OTP Microcontrollers with 4k Memory and 128 Bytes EERAM PDF資料下載
參數(shù)資料
| 型號： | COP8SEC520M |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-Bit CMOS ROM Based and OTP Microcontrollers with 4k Memory and 128 Bytes EERAM |
| 中文描述： | 8-BIT, MROM, 10 MHz, MICROCONTROLLER, PDSO20 |
| 封裝： | PLASTIC, SOP-20 |
| 文件頁數(shù)： | 25/47頁 |
| 文件大?。?/td> | 491K |
| 代理商： | COP8SEC520M |
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頁當(dāng)前第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
8.0 Interrupts
(Continued)
8.3.1 VIS Execution
When the VIS instruction is executed it activates the arbitra-
tion logic. The arbitration logic generates an even number
between E0 and FE (E0, E2, E4, E6 etc...) depending on
which active interrupt has the highest arbitration ranking at
the time of the 1st cycle of VIS is executed. For example, if
the software trap interrupt is active, FE is generated. If the
external interrupt is active and the software trap interrupt is
not, then FAis generated and so forth. If the only active inter-
rupt is software trap, than E0 is generated. This number re-
places the lower byte of the PC. The upper byte of the PC re-
mains unchanged. The new PC is therefore pointing to the
vector of the active interrupt with the highest arbitration rank-
ing. This vector is read from program memory and placed
into the PC which is now pointed to the 1st instruction of the
service routine of the active interrupt with the highest arbitra-
tion ranking.
Figure 19 illustrates the different steps performed by the VIS
instruction. Figure 20 shows a flowchart for the VIS instruc-
tion.
The non-maskable interrupt pending flag is cleared by the
RPND (Reset Non-Maskable Pending Bit) instruction (under
certain conditions) and upon RESET.
DS100973-29
FIGURE 19. VIS Operation
www.national.com
25
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| COP8SER7-RE | 8-Bit CMOS ROM Based and OTP Microcontrollers with 4k Memory and 128 Bytes EERAM |
| COP8SE | 8-Bit CMOS ROM Based and OTP Microcontrollers with 4k Memory and 128 Bytes EERAM(8位基于CMOS ROM和一次可編程的帶4K存儲器和128字節(jié)的EERAM微控制器) |
| COP8SGA928D3 | 8-Bit CMOS ROM Based and OTP Microcontrollers with 8k to 32k Memory, Two Comparators and USART |
| COP8SGA5DWF9 | 8-Bit CMOS ROM Based and OTP Microcontrollers with 8k to 32k Memory, Two Comparators and USART |
| COP8SGB5DWF9 | 8-Bit CMOS ROM Based and OTP Microcontrollers with 8k to 32k Memory, Two Comparators and USART |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| COP8SEC520M7 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-Bit Microcontroller |
| COP8SEC520M8 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-Bit Microcontroller |
| COP8SEC5A_ECOHA0NB WAF | 制造商:Texas Instruments 功能描述: |
| COP8SER720M8-RE | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:MICROCONTROLLER|8-BIT|COP800 CPU|CMOS|SOP|20PIN|PLASTIC |
| COP8SER720M8-XE | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:MICROCONTROLLER|8-BIT|COP800 CPU|CMOS|SOP|20PIN|PLASTIC |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。