ATMEGA8U2-AU Atmel, ATMEGA8U2-AU Datasheet - Page 216
ATMEGA8U2-AU
Manufacturer Part Number
ATMEGA8U2-AU
Description
MCU AVR 8K FLASH 16MHZ 32TQFP
Manufacturer
Atmel
Series
AVR® ATmegar
Specifications of ATMEGA8U2-AU
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
Processor Series
ATmega
Core
AVR
Data Bus Width
8 bit
Data Ram Size
512 B
Interface Type
SPI, USART, USB
Maximum Clock Frequency
16 MHz
Number Of Programmable I/os
22
Number Of Timers
2
Operating Supply Voltage
5 V
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
3rd Party Development Tools
EWAVR, EWAVR-BL
Development Tools By Supplier
ATAVRDRAGON, ATSTK500, ATSTK600, ATAVRISP2, ATAVRONEKIT, AT90USBKEY, ATEVK525
Minimum Operating Temperature
- 40 C
Operating Temperature Range
- 40 C to + 85 C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Data Converters
-
Lead Free Status / Rohs Status
Details
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
ATMEGA8U2-AU
Manufacturer:
Atmel
Quantity:
2 772
Part Number:
ATMEGA8U2-AU
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
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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
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