參數(shù)資料
型號(hào): SAF-C513A-HN
廠商: INFINEON TECHNOLOGIES AG
元件分類: 微控制器/微處理器
英文描述: 8-BIT, EEPROM, 8 MHz, MICROCONTROLLER, PQCC44
封裝: PLASTIC, LCC-44
文件頁數(shù): 71/128頁
文件大?。?/td> 1837K
代理商: SAF-C513A-HN
Semiconductor Group
6-14
On-Chip Peripheral Units
The reason why read-modify-write instructions are directed to the latch rather than the pin is to avoid
a possible misinterpretation of the voltage level at the pin. For example, a port bit might be used to
drive the base of a transistor. When a "1" is written to the bit, the transistor is turned on. If the CPU
then reads the same port bit at the pin rather than the latch, it will read the base voltage of the
transistor (approx. 0.7 V, i.e. a logic low level!) and interpret it as "0". For example, when modifying
a port bit by a SETB or CLR instruction, another bit in this port with the above mentioned
configuration might be changed if the value read from the pin were written back to the latch.
However, reading the latch rater than the pin will return the correct value of "1".
相關(guān)PDF資料
PDF描述
SAF-C515A-LM 8-BIT, 18 MHz, MICROCONTROLLER, PQFP80
SAF-C515C-8EMCA 8-BIT, OTPROM, 10 MHz, MICROCONTROLLER, PQFP80
SAF-C517A-4R24M 8-BIT, MROM, 24 MHz, MICROCONTROLLER, PQFP100
SAF-C868-1RR 8-BIT, MROM, 40 MHz, MICROCONTROLLER, PDSO38
SAF-C868-1SR 8-BIT, 40 MHz, MICROCONTROLLER, PDSO38
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
SAF-C513AO 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:8-bit CMOS Microcontroller
SAF-C515 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:8-Bit CMOS Microcontroller
SAF-C515-1R24M 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:8-Bit CMOS Microcontroller
SAF-C515-1RM 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:8-Bit CMOS Microcontroller
SAF-C515A-4R 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:8-Bit CMOS Microcontroller