ATMEGA16U2-MU Atmel, ATMEGA16U2-MU Datasheet - Page 222

• Manufacturer Part Number: ATMEGA16U2-MU
• Description: MCU AVR 16K FLASH USB 32-VQFN
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA16U2-MU

• 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: 16KB (8K 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-VQFN Exposed Pad, 32-HVQFN, 32-SQFN, 32-DHVQFN
• Core: AVR8
• Processor Series: ATMEGA16x
• Data Bus Width: 8 bit
• Maximum Clock Frequency: 16 MHz
• Data Ram Size: 1.25 KB
• Data Rom Size: 512 B
• Number Of Programmable I/os: 22
• Number Of Timers: 2
• Mounting Style: SMD/SMT
• Height: 0.95 mm
• Interface Type: SPI, UART
• Length: 5 mm
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 2.7 V
• Width: 5 mm
• For Use With: ATSTK600 - DEV KIT FOR AVR/AVR32ATSTK500 - PROGRAMMER AVR STARTER KIT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Data Converters: -
• Lead Free Status / Rohs Status: Details

21.18.19 UEINT – USB Endpoint Number interrupt Register
7799D–AVR–11/10
This register contains the number of received byte into the current bank of the selected end-
point. The content of this register is decremented after each write access to the endpoint data
register.
• Bits 7:5 – Res: Reserved
The value read from these bits is always 0. Do not set these bits.
• Bits 4:0 – EPINT[4:0]: Endpoint Interrupts Bits
These flags are updated by the USB controller when a USB endpoint interrupt occurs (at least
one bit in UEINTX set). Each bit in this field indicates which endpoint number has generated a
USB endpoint interrupt request. Each one of these bits are independently cleared by hardware
when their respective interrupt source is served.
Bit
(0xF4)
Read/Write
Initial Value
7
R
0
-
R
6
0
-
R
5
0
-
R
4
0
ATmega8U2/16U2/32U2
R
3
0
EPINT4:0
R
2
0
R
1
0
R
0
0
UEINT
R
222