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| 型號(hào)： | MF280C51C-36D |
| 廠商： | TEMIC SEMICONDUCTORS |
| 元件分類(lèi)： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, MROM, 36 MHz, MICROCONTROLLER, PQFP44 |
| 文件頁(yè)數(shù)： | 120/170頁(yè) |
| 文件大?。?/td> | 4133K |
| 代理商： | MF280C51C-36D |
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53
ATtiny4/5/9/10 [DATASHEET]
8127F–AVR–02/2013
A simplified block diagram of the 16-bit Timer/Counter is shown in Figure 11-1 on page 52. For actual placement of
I/O pins, refer to “Pinout of ATtiny4/5/9/10” on page 2. CPU accessible I/O Registers, including I/O bits and I/O
pins, are shown in bold. The device-specific I/O Register and bit locations are listed in the “Register Description” on
Most register and bit references in this section are written in general form. A lower case “n” replaces the
Timer/Counter number, and a lower case “x” replaces the Output Compare unit channel. However, when using the
register or bit defines in a program, the precise form must be used, i.e., TCNT0 for accessing Timer/Counter0
counter value and so on.
11.2.1
Registers
The Timer/Counter (TCNT0), Output Compare Registers (OCR0A/B), and Input Capture Register (ICR0) are all
16-bit registers. Special procedures must be followed when accessing the 16-bit registers. These procedures are
described in the section “Accessing 16-bit Registers” on page 70. The Timer/Counter Control Registers
(TCCR0A/B) are 8-bit registers and have no CPU access restrictions. Interrupt requests (abbreviated to Int.Req. in
the figure) signals are all visible in the Timer Interrupt Flag Register (TIFR). All interrupts are individually masked
with the Timer Interrupt Mask Register (TIMSK). TIFR and TIMSK are not shown in the figure.
The Timer/Counter can be clocked internally, via the prescaler, or by an external clock source on the T0 pin. The
Clock Select logic block controls which clock source and edge the Timer/Counter uses to increment (or decrement)
its value. The Timer/Counter is inactive when no clock source is selected. The output from the Clock Select logic is
referred to as the timer clock (clkT0).
The double buffered Output Compare Registers (OCR0A/B) are compared with the Timer/Counter value at all time.
The result of the compare can be used by the Waveform Generator to generate a PWM or variable frequency out-
put on the Output Compare pin (OC0A/B). See “Output Compare Units” on page 58. The compare match event will
also set the Compare Match Flag (OCF0A/B) which can be used to generate an Output Compare interrupt request.
The Input Capture Register can capture the Timer/Counter value at a given external (edge triggered) event on
either the Input Capture pin (ICP0) or on the Analog Comparator pins (See “Analog Comparator” on page 80). The
Input Capture unit includes a digital filtering unit (Noise Canceler) for reducing the chance of capturing noise
spikes.
The TOP value, or maximum Timer/Counter value, can in some modes of operation be defined by either the
OCR0A Register, the ICR0 Register, or by a set of fixed values. When using OCR0A as TOP value in a PWM
mode, the OCR0A Register can not be used for generating a PWM output. However, the TOP value will in this
case be double buffered allowing the TOP value to be changed in run time. If a fixed TOP value is required, the
ICR0 Register can be used as an alternative, freeing the OCR0A to be used as PWM output.
11.2.2
Definitions
The following definitions are used extensively throughout the section:
Table 11-1.
Definitions
Constant
Description
BOTTOM
The counter reaches BOTTOM when it becomes 0x00
MAX
The counter reaches its MAXimum when it becomes 0xFF (decimal 255)
TOP
The counter reaches the TOP when it becomes equal to the highest value in the count
sequence. The TOP value can be assigned to be the fixed value 0xFF (MAX) or the
value stored in the OCR0A Register. The assignment depends on the mode of operation
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| MS80C51T-16R | 8-BIT, MROM, 16 MHz, MICROCONTROLLER, PQCC44 |
| MV80C51C-12R | 8-BIT, MROM, 12 MHz, MICROCONTROLLER, PQFP44 |
| MF180C51T-16D | 8-BIT, MROM, 16 MHz, MICROCONTROLLER, PQFP44 |
| MP80C51T-20D | 8-BIT, MROM, 20 MHz, MICROCONTROLLER, PDIP40 |
| MV80C51C-20D | 8-BIT, MROM, 20 MHz, MICROCONTROLLER, PQFP44 |
相關(guān)代理商/技術(shù)參數(shù) |
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| MF283C151C-12 | 制造商:TEMIC 制造商全稱(chēng):TEMIC Semiconductors 功能描述:CMOS 0 to 36 MHz Single Chip 8-bit Microcontroller |
| MF283C151C-16 | 制造商:TEMIC 制造商全稱(chēng):TEMIC Semiconductors 功能描述:CMOS 0 to 36 MHz Single Chip 8-bit Microcontroller |
| MF283C151C-20 | 制造商:TEMIC 制造商全稱(chēng):TEMIC Semiconductors 功能描述:CMOS 0 to 36 MHz Single Chip 8-bit Microcontroller |
| MF283C151C-25 | 制造商:TEMIC 制造商全稱(chēng):TEMIC Semiconductors 功能描述:CMOS 0 to 36 MHz Single Chip 8-bit Microcontroller |
| MF283C151C-30 | 制造商:TEMIC 制造商全稱(chēng):TEMIC Semiconductors 功能描述:CMOS 0 to 36 MHz Single Chip 8-bit Microcontroller |
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