參數(shù)資料
型號(hào)： AT43USB355M-AU
廠商： ATMEL CORP
元件分類： 微控制器/微處理器
英文描述： Full-speed USB Microcontroller with Embedded Hub, ADC and PWM
中文描述： 8-BIT, MROM, 12 MHz, RISC MICROCONTROLLER, PQFP64
封裝： 1.40 MM, GREEN, PLASTIC, MS-026ACB, LQFP-64
文件頁(yè)數(shù)： 45/115頁(yè)
文件大?。?/td> 610K
代理商： AT43USB355M-AU
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45
AT43USB355
2603G–USB–04/06
Timer/Counter1 Control Register B – TCCR1B
Bit 7
–
ICNC1: Input Capture1 Noise Canceler (4 CKs)
When the ICNC1 bit is cleared (zero), the input capture trigger noise canceler function is dis-
abled. The input capture is triggered at the first rising/falling edge sampled on the ICP (input
capture pin) as specified. When the ICNC1 bit is set (one), four successive samples are mea-
sured on the ICP and all samples must be high/low according to the input capture trigger
specification in the ICES1 bit. The actual sampling frequency is the 12 MHz system clock
frequency.
Bit 6
–
ICES1: Input Capture1 Edge Select
While the ICES1 bit is cleared (zero), the Timer/Counter1 contents are transferred to the Input
Capture Register (ICR1) on the falling edge of the ICP. While the ICES1 bit is set (one), the
Timer/Counter1 contents are transferred to the ICR1 on the rising edge of the ICP.
Bits 5, 4
–
Res: Reserved Bits
These bits are reserved bits in the AT43USB355 and always read zero.
Bit 3
–
CTC1: Clear Timer/Counter1 on Compare Match
When the CTC1 control bit is set (one), the Timer/Counter1 is reset to $0000 in the clock cycle
after a compareA match. If the CTC1 control bit is cleared, Timer/Counter1 continues counting
and is unaffected by a compare match. Since the compare match is detected in the CPU clock
cycle following the match, this function will behave differently when a prescaling higher than 1
is used for the timer. When a prescaling of 1 is used, and the compareA register is set to C,
the timer will count as follows if CTC1 is set:
... | C-2 | C-1 | C | 0 | 1 | ...
When the prescaler is set to divide by 8, the timer will count like this:
... | C-2, C-2, C-2, C-2, C-2, C-2, C-2, C-2 | C-1, C-1, C-1, C-1, C-1, C-1, C-1, C-1 | C, 0, 0, 0,
0, 0, 0, 0 | ...
In PWM mode, this bit has no effect.
Bits 2, 1, 0
–
CS12, CS11, CS10: Clock Select1, Bit 2, 1 and 0
The Clock Select1 bits 2, 1 and 0 define the prescaling source of Timer/Counter1.
Bit
7
6
5
4
3
2
1
0
$2E ($4E)
ICNC1
ICES1
–
–
CTC1
CS12
CS11
CS10
TCCR1B
Read/Write
R/W
R/W
R/W
R/W
R
R
R/W
R/W
Initial Value
0
0
0
0
0
0
0
0
Table 14.
Clock 1 Prescale Select
CS12
CS11
CS10
Description
0
0
0
Stop, the Timer/Counter1 is stopped.
0
0
1
CK
0
1
0
CK/8
0
1
1
CK/64
1
0
0
CK/256
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AT43USB380E-AI 功能描述:USB 接口集成電路 USB OTG/HOST/FUNC DEVICE CNTRL RoHS:否 制造商:Cypress Semiconductor 產(chǎn)品:USB 2.0 數(shù)據(jù)速率: 接口類型:SPI 工作電源電壓:3.15 V to 3.45 V 工作電源電流: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WLCSP-20
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