ATMEGA8U2-AUR Atmel, ATMEGA8U2-AUR Datasheet - Page 216

• Manufacturer Part Number: ATMEGA8U2-AUR
• Description: MCU AVR 8K FLASH 16MHZ 32TQFP
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA8U2-AUR

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: SPI, UART/USART, USB
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 22
• Program Memory Size: 8KB (4K x 16)
• 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-TQFP, 32-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Data Converters: -

21.18.12 UECFG1X – USB Endpoint Configuration 1 Register
7799D–AVR–11/10
• Bit 7 – Res: Reserved
This bit is reserved and will always read as zero.
• Bit 6:4 – EPSIZE[2:0]: Endpoint Size Bits
These bits configure the endpoint size for the selected endpoint as shown in
Table 21-3.
• Bits 3:2 – EPBK[1:0]: Endpoint Bank Bits
These bits configure the number of banks that is allocated to the selected endpoint as shown in
Table
Table 21-4.
• Bit 1 – ALLOC: Endpoint Allocation Bit
Writing this to one allows to allocate the specified amount of memory (endpoint size x number of
banks) for the selected endpoint. Writing this bit to zero allows to free the previously allocated
memory for the selected endpoint.
See Section 21.6, page 198 for more details.
• Bit 0 – Res: Reserved
This bit is reserved and will always read as zero.
Bit
(0xED)
Read/Write
Initial Value
EPSIZE2
21-3.
EPBK1
0
0
0
0
1
1
1
1
0
0
1
1
R
7
0
EPSIZE[2:0] Bits Settings
-
EPBK[1:0] Bits Settings
R/W
6
0
EPSIZE1
0
0
1
1
0
0
1
1
EPSIZE[2:0]
R/W
5
0
EPBK0
0
1
0
1
R/W
4
0
EPSIZE0
0
1
0
1
0
1
0
1
R/W
Endpoint Size
One Bank
Two Banks
Reserved
ATmega8U2/16U2/32U2
3
0
EPBK1:0
Endpoint Size
8 Bytes
16 Bytes
32 Bytes
64 Bytes
Reserved.
R/W
2
0
ALLOC
R/W
1
0
Table
R
0
0
-
21-3.
UECFG1X
216