參數(shù)資料
型號(hào): MB91110PMT2
廠商: FUJITSU LTD
元件分類: 微控制器/微處理器
英文描述: 32-BIT, 50 MHz, RISC MICROCONTROLLER, PQFP144
封裝: PLASTIC, LQFP-144
文件頁數(shù): 86/94頁
文件大小: 1099K
代理商: MB91110PMT2
90
Atmel ATmega16/32/64/M1/C1 [DATASHEET]
7647K–AVR–12/13
12.8.3 Timer/Counter Register – TCNT0
The Timer/Counter register gives direct access, both for read and write operations, to the Timer/Counter unit 8-bit counter.
Writing to the TCNT0 register blocks (removes) the compare match on the following timer clock. Modifying the counter (TCNT0)
while the counter is running, introduces a risk of missing a compare match between TCNT0 and the OCR0x registers.
12.8.4 Output Compare Register A – OCR0A
The output compare register A contains an 8-bit value that is continuously compared with the counter value (TCNT0). A match
can be used to generate an output compare interrupt, or to generate a waveform output on the OC0A pin.
12.8.5 Output Compare Register B – OCR0B
The output compare register B contains an 8-bit value that is continuously compared with the counter value (TCNT0). A match
can be used to generate an output compare interrupt, or to generate a waveform output on the OC0B pin.
12.8.6 Timer/Counter Interrupt Mask Register – TIMSK0
Bits 7..3 – Res: Reserved Bits
These bits are reserved bits in the ATmega16/32/64/M1/C1 and will always read as zero.
Bit 2 – OCIE0B: Timer/Counter Output Compare Match B Interrupt Enable
When the OCIE0B bit is written to one, and the I-bit in the status register is set, the Timer/Counter compare match B interrupt is
enabled. The corresponding interrupt is executed if a compare match in Timer/Counter occurs, i.e., when the OCF0B bit is set in
the Timer/Counter interrupt flag register – TIFR0.
Bit 1 – OCIE0A: Timer/Counter0 Output Compare Match A Interrupt Enable
When the OCIE0A bit is written to one, and the I-bit in the status register is set, the Timer/Counter0 compare match A interrupt
is enabled. The corresponding interrupt is executed if a compare match in Timer/Counter0 occurs, i.e., when the OCF0A bit is
set in the Timer/Counter 0 interrupt flag register – TIFR0.
Bit 0 – TOIE0: Timer/Counter0 Overflow Interrupt Enable
When the TOIE0 bit is written to one, and the I-bit in the status register is set, the Timer/Counter0 Overflow interrupt is enabled.
The corresponding interrupt is executed if an overflow in Timer/Counter0 occurs, i.e., when the TOV0 bit is set in the
Timer/Counter 0 interrupt flag register – TIFR0.
Bit
7654
3210
TCNT0[7:0]
TCNT0
Read/Write
R/W
Initial Value
0000
Bit
7654
3210
OCR0A[7:0]
OCR0A
Read/Write
R/W
Initial Value
0000
Bit
7654
321
0
OCR0B[7:0]
OCR0B
Read/Write
R/W
Initial Value
0000
000
0
Bit
765
4
3
2
1
0
OCIE0B
OCIE0A
TOIE0
TIMSK0
Read/Write
R
R/W
Initial Value
0
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