參數資料
型號: AT90USB82-16MUR
廠商: Atmel
文件頁數: 31/38頁
文件大?。?/td> 0K
描述: MCU AVR USB 8K FLASH 32-QFN
產品培訓模塊: MCU Product Line Introduction
megaAVR Introduction
標準包裝: 5,000
系列: AVR® 90USB
核心處理器: AVR
芯體尺寸: 8-位
速度: 16MHz
連通性: EBI/EMI,PS/2,SPI,UART/USART,USB
外圍設備: 欠壓檢測/復位,POR,PWM,WDT
輸入/輸出數: 22
程序存儲器容量: 8KB(8K x 8)
程序存儲器類型: 閃存
EEPROM 大?。?/td> 512 x 8
RAM 容量: 512 x 8
電壓 - 電源 (Vcc/Vdd): 2.7 V ~ 5.5 V
振蕩器型: 內部
工作溫度: -40°C ~ 85°C
封裝/外殼: 32-VFQFN 裸露焊盤
包裝: 帶卷 (TR)
配用: ATSTK600-ND - DEV KIT FOR AVR/AVR32
ATSTK526-ND - KIT STARTER FOR AT90USB82/162
ATAVRDRAGON-ND - KIT DRAGON FLASH MEM AVR
ATSTK525-ND - KIT STARTER FOR AT90USB
AT90USBKEY2-ND - KIT DEMO FOR AT90USB
37
7707F–AVR–11/10
AT90USB82/162
Figure 6-6.
PLL Clocking System
6.9.2
PLL Control and Status Register – PLLCSR
Bit 7..5 – Res: Reserved Bits
These bits are reserved bits in the AT90USB82/162 and always read as zero.
Bit 4..2 – PLLP2:0 PLL prescaler
These bits allow to configure the PLL input prescaler to generate the 8MHz input clock for the
PLL.
Bit 1 – PLLE: PLL Enable
When the PLLE is set, the PLL is started and if needed internal RC Oscillator is started as a PLL
reference clock. If PLL is selected as a system clock source the value for this bit is always 1.
XTAL2
XTAL1
XTAL
PLL
6x
PLLE
Lock
Detector
PLOCK
clkUSB (48MHz)
PLL clock
Prescaler
System Clock
clk
8MHz
Ext.
Int RC
8MHz.
Clock Switch
Clock Mux (fuse)
Bit
7
65
43
21
0
$29 ($29)
PLLP2
PLLP1
PLLP0
PLLE
PLOCK
PLLCSR
Read/Write
R
R/W
R
Initial Value
0
0/1
0
Table 6-10.
PLL input prescaler configurations
PLLP2
PLLP1
PLLP0
Clock Division Factor
00
0
1
00
1
2
0
1
0
Reserved
0
1
Reserved
1
0
Reserved
1
0
1
Reserved
1
0
Reserved
1
Reserved
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