AT90USB82-16MUR Atmel, AT90USB82-16MUR Datasheet - Page 37

• Manufacturer Part Number: AT90USB82-16MUR
• Description: MCU AVR USB 8K FLASH 32-QFN
• Manufacturer: Atmel
• Series: AVR® 90USBr

Specifications of AT90USB82-16MUR

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: EBI/EMI, PS/2, SPI, UART/USART, USB
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 22
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 512 x 8
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 32-QFN
• Data Bus Width: 8 bit
• Data Ram Size: 512 B
• Interface Type: SPI, USART, debugWIRE
• Maximum Clock Frequency: 16 MHz
• Number Of Programmable I/os: 22
• Number Of Timers: 2
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• For Use With: ATSTK600 - DEV KIT FOR AVR/AVR32ATSTK526 - KIT STARTER FOR AT90USB82/162ATAVRDRAGON - KIT DRAGON 32KB FLASH MEM AVRATSTK525 - KIT STARTER FOR AT90USBAT90USBKEY2 - KIT DEMO FOR AT90USB
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Data Converters: -
• Lead Free Status / Rohs Status: Details

6.9.2
7707F–AVR–11/10
PLL Control and Status Register – PLLCSR
Figure 6-6.
• 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.
Table 6-10.
• 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.
Bit
$29 ($29)
Read/Write
Initial Value
PLLP2
XTAL2
XTAL1
0
0
0
0
1
1
1
1
0
7
R
PLL Clocking System
PLL input prescaler configurations
XTAL
0
Clock Mux (fuse)
6
R
PLLP1
Clock Switch
PLL clock
Prescaler
0
0
1
1
0
0
1
1
Ext.
5
R
0
Int RC
8MHz.
4
PLLP2
R
0
clk
8MHz
PLLP0
0
1
0
1
0
1
0
1
3
PLLP1
R
0
PLL
PLLE
6x
2
PLLP0
R
0
Detector
Lock
AT90USB82/162
Clock Division Factor
PLOCK
1
PLLE
R/W
0/1
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
1
2
0
PLOCK
R
0
clk USB (48MHz)
System Clock
PLLCSR
37