參數(shù)資料
型號(hào)： AT43USB325E-AC
廠商： ATMEL CORP
元件分類(lèi)： 微控制器/微處理器
英文描述： Multimedia USB Keyboard Controller with Embedded Hub
中文描述： 8-BIT, 12 MHz, RISC MICROCONTROLLER, PQFP64
封裝： 1.40 MM HEIGHT, PLASTIC, MS-026-ACB, LQFP-64
文件頁(yè)數(shù)： 52/109頁(yè)
文件大?。?/td> 643K
代理商： AT43USB325E-AC
52
3355C–USB–4/05
AT43USB325
Note:
Note that in the PWM mode, the 10 least significant OCR1A/OCR1B bits, when written, are
transferred to a temporary location. They are latched when Timer/Counter1 reaches the value
TOP. This prevents the occurrence of odd-length PWM pulses (glitches) in the event of an
unsynchronized OCR1A/OCR1B write. See
Figure 6-5
for an example.
X = A or B
Figure 6-5.
Effects on Unsynchronized OCR1 Latching
Note:
X = A or B
During the time between the write and the latch operation, a read from OCR1A or OCR1B will
read the contents of the temporary location. This means that the most recently written value
always will read out of OCR1A/B
When the OCR1 contains $0000 or TOP, the output OC1A/OC1B is updated to low or high on
the next compare match, according to the settings of COM1A1/COM1A0 or COM1B1/COM1B0.
This is shown in
Table 6-7
.
Note: If the compare register contains the TOP value and the prescaler is not in use
(CS12..CS10 = 001), the PWM output will not produce any pulse at all, because up-counting and
down-counting values are reached simultaneously. When the prescaler is in use (CS12..CS10 =
001 or 000), the PWM output goes active when the counter reaches the TOP value, but the
Table 6-6.
Compare1 Mode Select in PWM Mode
COM1X1
COM1X0
Effect on OCX1
0
0
Not connected
0
1
Not connected
1
0
Cleared on compare match, up-counting. Set on compare match,
down-counting (non-inverted PWM).
1
1
Cleared on compare match, down-counting. Set on compare match,
up-counting (inverted PWM).
Synchronized
OCR1X Latch
PWM Output OC1X
Counter Value
Compare Value
PWM Output OC1X
Counter Value
Compare Value
Unsynchronized
OCR1X Latch
Glitch
Compare Value Changes
Compare Value Changes
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AT43USB325E-AU 功能描述:USB 接口集成電路 USB KEYBOARD CONTROL w/HUB - IND TEMP RoHS:否 制造商:Cypress Semiconductor 產(chǎn)品:USB 2.0 數(shù)據(jù)速率: 接口類(lèi)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
AT43USB326 制造商:ATMEL 制造商全稱(chēng):ATMEL Corporation 功能描述:Missed Watchdog Timer Reset
AT43USB326_06 制造商:ATMEL 制造商全稱(chēng):ATMEL Corporation 功能描述:Multimedia USB Keyboard Controller with Embedded Hub
AT43USB326-AC 功能描述:USB 接口集成電路 USB KEYBOARD F/LOGI- TECH - COM TEMP RoHS:否 制造商:Cypress Semiconductor 產(chǎn)品:USB 2.0 數(shù)據(jù)速率: 接口類(lèi)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
AT43USB326-AU 功能描述:USB 接口集成電路 USB KEYBOARD FOR LOGITECH - IND TEMP RoHS:否 制造商:Cypress Semiconductor 產(chǎn)品:USB 2.0 數(shù)據(jù)速率: 接口類(lèi)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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