參數(shù)資料
型號: AT32UC3A1256
廠商: Atmel Corp.
英文描述: AVR32 32-Bit Microcontroller
中文描述: AVR32 32位微控制器
文件頁數(shù): 97/109頁
文件大小: 10824K
代理商: AT32UC3A1256
73
ATtiny20 [DATASHEET]
8235E–AVR–03/2013
However, for ensuring compatibility with future devices, this bit must be set to zero when TCCR0B is written when
operating in PWM mode. When writing a logical one to the FOC0B bit, an immediate Compare Match is forced on the
Waveform Generation unit. The OC0B output is changed according to its COM0B[1:0] bits setting. Note that the FOC0B
bit is implemented as a strobe. Therefore it is the value present in the COM0B[1:0] bits that determines the effect of the
forced compare.
A FOC0B strobe will not generate any interrupt, nor will it clear the timer in CTC mode using OCR0B as TOP.
The FOC0B bit always reads as zero.
Bits 5:4 – Res: Reserved Bits
These bits are reserved bits in the ATtiny20 and will always read as zero.
Bit 3 – WGM02: Waveform Generation Mode
Bits 2:0 – CS0[2:0]: Clock Select
The three Clock Select bits select the clock source to be used by the Timer/Counter.
Table 11-9.
Clock Select Bit Description
If external pin modes are used for the Timer/Counter0, transitions on the T0 pin will clock the counter even if the pin is
configured as an output. This feature allows software control of the counting.
11.9.3 TCNT0 – Timer/Counter Register
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.
CS02
CS01
CS00
Description
0
No clock source (Timer/Counter stopped)
0
1
clkI/O/(No prescaling)
0
1
0
clkI/O/8 (From prescaler)
0
1
clkI/O/64 (From prescaler)
1
0
clkI/O/256 (From prescaler)
1
0
1
clkI/O/1024 (From prescaler)
1
0
External clock source on T0 pin. Clock on falling edge.
1
External clock source on T0 pin. Clock on rising edge.
Bit
76543210
TCNT0[7:0]
TCNT0
Read/Write
R/W
Initial Value
00000000
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AT32UC3A1256-AUT 功能描述:32位微控制器 - MCU 32-bit 256KB Flash RoHS:否 制造商:Texas Instruments 核心:C28x 處理器系列:TMS320F28x 數(shù)據(jù)總線寬度:32 bit 最大時鐘頻率:90 MHz 程序存儲器大小:64 KB 數(shù)據(jù) RAM 大小:26 KB 片上 ADC:Yes 工作電源電壓:2.97 V to 3.63 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:LQFP-80 安裝風(fēng)格:SMD/SMT
AT32UC3A1512 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:AVR 32 32-Bit Microcontroller
AT32UC3A1512-AU 制造商:Atmel Corporation 功能描述: