ATMEGA16U2-MU Atmel, ATMEGA16U2-MU Datasheet - Page 198
ATMEGA16U2-MU
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
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
ATMEGA16U2-MU
Manufacturer:
RALINK
Quantity:
2 400
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21.4
21.5
21.6
7799D–AVR–11/10
USB reset
Endpoint selection
Endpoint activation
The data toggle field remains unchanged.
The other registers remain unchanged.
The endpoint configuration remains active and the endpoint is still enabled.
The endpoint reset may be associated with a clear of the data toggle command (RSTDT bit) as
an answer to the CLEAR_FEATURE USB command.
When an USB reset is detected on the USB line (SEO state with a minimal duration of 100µs),
the next operations are performed by the controller:
If the hardware reset function is selected, a reset is generated to the CPU core without disabling
the USB controller (that remains in the same state than after a USB Reset).
Prior to any operation performed by the CPU, the endpoint must first be selected. This is done
by setting the EPNUM[2:0] bits (in UENUM register) with the endpoint number which will be
managed by the CPU.
The CPU can then access to the various endpoint registers and data.
The endpoint is maintained under reset as long as the EPEN bit is not set.
The following flow must be respected in order to activate an endpoint:
• the Rx and Tx banks are cleared and their internal pointers are restored,
• the UEINTX, UESTA0X and UESTA1X are restored to their reset value.
• All the endpoints are disabled.
• The default control endpoint remains configured.
• The data toggle of the default control endpoint is cleared.
ATmega8U2/16U2/32U2
198
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