參數(shù)資料
型號： MF180C51T-25R
廠商： TEMIC SEMICONDUCTORS
元件分類： 微控制器/微處理器
英文描述： 8-BIT, MROM, 25 MHz, MICROCONTROLLER, PQFP44
文件頁數(shù)： 142/170頁
文件大小： 4133K
代理商： MF180C51T-25R
73
ATtiny4/5/9/10 [DATASHEET]
8127F–AVR–02/2013
When OC0A or OC0B is connected to the pin, the function of COM0x1:0 bits depends on the WGM03:0 bits. Table
11-2 shows the COM0x1:0 bit functionality when the WGM03:0 bits are set to a Normal or CTC (non-PWM) Mode.
Table 11-3 shows the COM0x1:0 bit functionality when the WGM03:0 bits are set to one of the Fast PWM Modes.
Note:
1. A special case occurs when OCR0A/OCR0B equals TOP and COM0A1/COM0B1 is set. In this case the compare
match is ignored, but set or clear is done at BOTTOM. See “Fast PWM Mode” on page 63 for more details.
Table 11-4 shows the COM0x1:0 bit functionality when the WGM03:0 bits are set to the phase correct or the phase
and frequency correct, PWM mode.
Note:
1. A special case occurs when OCR0A/OCR0B equals TOP and COM0A1/COM0B1 is set. “Phase Correct PWM
Mode” on page 65 for more details.
Bits 1:0 – WGM01:0: Waveform Generation Mode
Combined with WGM03:2 bits of TCCR0B, these bits control the counting sequence of the counter, the source for
maximum (TOP) counter value, and what type of waveform to generate. See Table 11-5. Modes of operation sup-
Table 11-2.
Compare Output in Non-PWM Modes
COM0A1/
COM0B1
COM0A0
COM0B0
Description
0
Normal port operation: OC0A/OC0B disconnected
1
Toggle OC0A/OC0B on compare match
1
0
Clear (set low) OC0A/OC0B on compare match
1
Set (high) OC0A/OC0B on compare match
Table 11-3.
Compare Output in Fast PWM Modes
COM0A1/
COM0B1
COM0A0/
COM0B0
Description
0
Normal port operation: OC0A/OC0B disconnected
1
WGM03 = 0: Normal port operation, OC0A/OC0B disconnected
WGM03 = 1: Toggle OC0A on compare match, OC0B reserved
1
0
Clear OC0A/OC0B on compare match
Set OC0A/OC0B at BOTTOM (non-inverting mode)
1
Set OC0A/OC0B on compare match
Clear OC0A/OC0B at BOTTOM (inverting mode)
Table 11-4.
Compare Output in Phase Correct and Phase & Frequency Correct PWM Modes
COM0A1/
COM0B1
COM0A0/
COM0B0
Description
0
Normal port operation: OC0A/OC0B disconnected.
1
WGM03 = 0: Normal port operation, OC0A/OC0B disconnected
WGM03 = 1: Toggle OC0A on compare match, OC0B reserved
1
0
Counting up: Clear OC0A/OC0B on compare match
Counting down: Set OC0A/OC0B on compare match
1
Counting up: Set OC0A/OC0B on compare match
Counting down: Clear OC0A/OC0B on compare match
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