参数资料
| 型号： | ATF16V8B-15SU |
| 厂商： | Atmel |
| 文件页数： | 19/26页 |
| 文件大小： | 0K |
| 描述： | IC PLD EE 15NS 20-SOIC |
| 标准包装： | 37 |
| 系列： | 16V8 |
| 可编程类型： | EE PLD |
| 宏单元数： | 8 |
| 输入电压： | 5V |
| 速度： | 15ns |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-SOIC（0.295"，7.50mm 宽） |
| 供应商设备封装： | 20-SOIC W |
| 包装： | 管件 |
| 产品目录页面： | 610 (CN2011-ZH PDF) |
26
7707F–AVR–11/10
AT90USB82/162
6.1.4
USB Clock – clk
USB
The USB is provided with a dedicated clock domain. This clock is generated with an on-chip PLL
running at 48MHz. The PLL always multiply its input frequency by 6. Thus the PLL clock register
should be programmed by software to generate a 8MHz clock on the PLL input.
6.2
Clock Switch
In the AT90USB82/162 product, the Clock Multiplexer and the System Clock Prescaler can be
modified by software.
6.2.1
Exemple of use
The modification can occur when the device enters in USB Suspend mode. It then switches from
External Clock to Calibrated RC Oscillator in order to reduce consumption. In such a configura-
tion, the External Clock is disabled.
The firmware can use the watchdog timer to be woken-up from power-down in order to check if
there is an event on the application.
If an event occurs on the application or if the USB controller signals a non-idle state on the USB
line (Resume for example), the firmware switches the Clock Multiplexer from the Calibrated RC
Oscillator to the External Clock.
Figure 6-2.
Example of clock switching with wake-up from USB Host
USB
CPU Clock
External
Oscillator
RC oscillator
Ext
RC
Ext
non-Idle
Idle
(Suspend)
non-Idle
3m
s
resume
1
1 Resume from Host
watchdog wake-up
from power-down
相关PDF资料 |
PDF描述 |
|---|---|
| IDT71342SA35PF | IC SRAM 32KBIT 35NS 64TQFP |
| 1-84984-4 | CONN FFC 14POS 1.00MM VERT PCB |
| MPC866TCVR100A | IC MPU POWERQUICC 100MHZ 357PBGA |
| 4-1734839-6 | CONN FPC 46POS .5MM RT ANG SMD |
| MPC8275VRMIBA | IC MPU POWERQUICC II 516-PBGA |
相关代理商/技术参数 |
参数描述 |
|---|---|
| ATF16V8B-15SU SL383 | 制造商:Atmel Corporation 功能描述:SPLD ATF16V8B Family 250 Gates 8 Macro Cells 62MHz 5V 20-Pin SOIC 制造商:Atmel Corporation 功能描述:SPLD ATF16V8B Family 250 Gates 8 Macro Cells 62MHz CMOS Technology 5V 20-Pin SOIC 制造商:Atmel 功能描述:SPLD ATF16V8B Family 250 Gates 8 Macro Cells 62MHz CMOS Technology 5V 20-Pin SOIC 制造商:Atmel 功能描述:SPLD ATF16V8B Family 250 Gates 8 Macro Cells 62MHz 5V 20-Pin SOIC |
| ATF16V8B-15XC | 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:Highperformance EE PLD |
| ATF16V8B-15XI | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Electrically-Erasable PLD |
| ATF16V8B-15XU | 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:Highperformance EE PLD |
| ATF16V8B-25GC | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Electrically-Erasable PLD |
发布紧急采购，3分钟左右您将得到回复。