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| 型號： | COP8CCR9LVA8 |
| 廠商： | National Semiconductor |
| 文件頁數(shù)： | 89/111頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC MCU EEPROM 8BIT 68-PLCC |
| 標(biāo)準包裝： | 18 |
| 系列： | COP8™ 8C |
| 核心處理器： | COP8 |
| 芯體尺寸： | 8-位 |
| 速度： | 20MHz |
| 連通性： | Microwire/Plus（SPI），UART/USART |
| 外圍設(shè)備： | 欠壓檢測/復(fù)位，POR，PWM，WDT |
| 輸入/輸出數(shù)： | 59 |
| 程序存儲器容量： | 32KB（32K x 8） |
| 程序存儲器類型： | 閃存 |
| RAM 容量： | 1K x 8 |
| 電壓 - 電源 (Vcc/Vdd)： | 2.7 V ~ 5.5 V |
| 數(shù)據(jù)轉(zhuǎn)換器： | A/D 16x10b |
| 振蕩器型： | 內(nèi)部 |
| 工作溫度： | -40°C ~ 85°C |
| 封裝/外殼： | 68-LCC（J 形引線） |
| 包裝： | 管件 |
| 其它名稱： | *COP8CCR9LVA8 |
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SNOS535I – OCTOBER 2000 – REVISED MARCH 2013
The Software Trap indicates an unusual or unknown error condition. Generally, returning to normal
execution at the point where the Software Trap occurred cannot be done reliably. Therefore, the Software
Trap service routine should re-initialize the stack pointer and perform a recovery procedure that re-starts
the software at some known point, similar to a device Reset, but not necessarily performing all the same
functions as a device Reset. The routine must also execute the RPND instruction to reset the STPND flag.
Otherwise, all other interrupts will be locked out. To the extent possible, the interrupt routine should record
or indicate the context of the device so that the cause of the Software Trap can be determined.
If the user wishes to return to normal execution from the point at which the Software Trap was triggered,
the user must first execute RPND, followed by RETSK rather than RETI or RET. This is because the
return address stored on the stack is the address of the INTR instruction that triggered the interrupt. The
program must skip that instruction in order to proceed with the next one. Otherwise, an infinite loop of
Software Traps and returns will occur.
Programming a return to normal execution requires careful consideration. If the Software Trap routine is
interrupted by another Software Trap, the RPND instruction in the service routine for the second Software
Trap will reset the STPND flag; upon return to the first Software Trap routine, the STPND flag will have the
wrong state. This will allow maskable interrupts to be acknowledged during the servicing of the first
Software Trap. To avoid problems such as this, the user program should contain the Software Trap
routine to perform a recovery procedure rather than a return to normal execution.
Under normal conditions, the STPND flag is reset by a RPND instruction in the Software Trap service
routine. If a programming error or hardware condition (brownout, power supply glitch, etc.) sets the
STPND flag without providing a way for it to be cleared, all other interrupts will be locked out. To alleviate
this condition, the user can use extra RPND instructions in the main program and in the Watchdog service
routine (if present). There is no harm in executing extra RPND instructions in these parts of the program.
Figure 5-25. VIS Flow Chart
Copyright 2000–2013, Texas Instruments Incorporated
Functional Description
79
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| COP8CDE9 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:8-Bit CMOS Flash Microcontroller with 8k Memory, Virtual EEPROM, 10-Bit A/D and Brownout Reset |
| COP8CDE9HLQ7 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:8-Bit CMOS Flash Microcontroller with 8k Memory, Virtual EEPROM, 10-Bit A/D and Brownout Reset |
| COP8CDE9HLQ9 | 功能描述:IC MCU FLASH 8BIT 8K A/D 44LLP RoHS:是 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:COP8™ 8C 標(biāo)準包裝:250 系列:56F8xxx 核心處理器:56800E 芯體尺寸:16-位 速度:60MHz 連通性:CAN，SCI，SPI 外圍設(shè)備:POR，PWM，溫度傳感器，WDT 輸入/輸出數(shù):21 程序存儲器容量:40KB（20K x 16） 程序存儲器類型:閃存 EEPROM 大小:- RAM 容量:6K x 16 電壓 - 電源 (Vcc/Vdd):2.25 V ~ 3.6 V 數(shù)據(jù)轉(zhuǎn)換器:A/D 6x12b 振蕩器型:內(nèi)部 工作溫度:-40°C ~ 125°C 封裝/外殼:48-LQFP 包裝:托盤 配用:MC56F8323EVME-ND - BOARD EVALUATION MC56F8323 |
| COP8CDE9HVA7 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:8-Bit CMOS Flash Microcontroller with 8k Memory, Virtual EEPROM, 10-Bit A/D and Brownout Reset |
| COP8CDE9HVA9 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:8-Bit CMOS Flash Microcontroller with 8k Memory, Virtual EEPROM, 10-Bit A/D and Brownout Reset |
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