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| 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(yè)數(shù)： | 72/128頁(yè) |
| 文件大?。?/td> | 1837K |
| 代理商： | SAF-C513A-HN |
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On-Chip Peripheral Units
Semiconductor Group
6-15
6.2
Timers/Counters
The SAB-C511/513 microcontrollers contains two (SAB-C511/C511A) or three (SAB-C513/C513A/
C513A-H) 16-bit timers/counters which are useful in many applications for timing and counting
functions.
In timer function, the register is incremented every machine cycle. Thus one can think of it as
counting machine cycles. Since a machine cycle consists of 12 oscillator periods, the counter rate
is 1/12 of the oscillator frequency.
In counter function, the register is incremented in response to a 1-to-0 transition (falling edge) at
its corresponding external input pin, T0 or T1 (alternate functions of P3.4 and P3.5, resp.). In this
function the external input is sampled during S5P2 of every machine cycle. When the samples show
a high in one cycle and a low in the next cycle, the counter is incremented. The new count value
appears in the register during S3P1 of the cycle following the one in which the transition was
detected. Since it takes two machine cycles (24 oscillator periods) to recognize a 1-to-0 transition,
the maximum count rate is 1/24 of the oscillator frequency. There are no restrictions on the duty
cycle of the external input signal, but to ensure that a given level is sampled at least once before it
changes, it must be held for at least one full machine cycle.
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| 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 |
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