参数资料
| 型号： | ATF16V8B-10JC |
| 厂商： | Atmel |
| 文件页数： | 19/26页 |
| 文件大小： | 0K |
| 描述： | IC PLD 8CELL 10NS 20PLCC |
| 标准包装： | 48 |
| 系列： | 16V8 |
| 可编程类型： | EE PLD |
| 宏单元数： | 8 |
| 输入电压： | 5V |
| 速度： | 10ns |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-LCC（J 形引线） |
| 供应商设备封装： | 20-PLCC |
| 包装： | 管件 |
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 |
|---|---|
| ATF16LV8C-10SC | IC PLD EE 15NS 20-SOIC |
| 1-84952-4 | CONN FPC 14POS 1.00MM R/A SMD |
| AMC65DREF-S734 | CONN EDGECARD 130PS .100 EYELET |
| ABC65DRAI-S734 | CONN EDGECARD 130PS .100 R/A PCB |
| 2-84952-4 | CONN FPC 24POS 1MM RT ANG SMD |
相关代理商/技术参数 |
参数描述 |
|---|---|
| ATF16V8B-10JC SL383 | 制造商:Atmel Corporation 功能描述:10NS,250 GATES EPLD,20 PIN PLCC,5V GRN - 10NS, PLCC, COM TEM - Tape and Reel |
| ATF16V8B-10JI | 功能描述:EEPLD - 电子擦除可编程逻辑设备 250 Gate RoHS:否 制造商:Atmel 逻辑系列:ATF16V8BQL 最大工作频率:62 MHz 可编程输入/输出端数量:20 电源电流:20 mA 延迟时间:15 ns 每个宏指令的积项数:8 电源电压-最大:5.5 V 电源电压-最小:4.5 V 大电池数量:8 最小工作温度:- 40 C 最大工作温度:+ 85 C 安装风格:Through Hole 封装 / 箱体:PDIP-20 |
| ATF16V8B-10JU | 功能描述:EEPLD - 电子擦除可编程逻辑设备 10 ns 20 I/O Pins 8 macorcells 8 reg RoHS:否 制造商:Atmel 逻辑系列:ATF16V8BQL 最大工作频率:62 MHz 可编程输入/输出端数量:20 电源电流:20 mA 延迟时间:15 ns 每个宏指令的积项数:8 电源电压-最大:5.5 V 电源电压-最小:4.5 V 大电池数量:8 最小工作温度:- 40 C 最大工作温度:+ 85 C 安装风格:Through Hole 封装 / 箱体:PDIP-20 |
| ATF16V8B-10NM | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Electrically-Erasable PLD |
| ATF16V8B-10NM/883 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Electrically-Erasable PLD |
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