AT90USB82-16MUR Atmel, AT90USB82-16MUR Datasheet - Page 191
AT90USB82-16MUR
Manufacturer Part Number
AT90USB82-16MUR
Description
MCU AVR USB 8K FLASH 32-QFN
Manufacturer
Atmel
Series
AVR® 90USBr
Datasheet
1.AT90USB82-16MU.pdf
(307 pages)
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
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- Download datasheet (4Mb)
19.7
7707F–AVR–11/10
PAD suspend
EPEN=1
ALLOC=1
Table 19-1.
Note that :
The next figures illustrates the pad behaviour:
Free memory
• First, Endpoint 0 to Endpoint 4 are configured, in the growing order. The memory of each is
• Then, the Endpoint 2is disabled (EPEN=0), but its memory reservation is internally kept by
• Its ALLOC bit is cleared: the Endpoint 3 “slides” down, but the Endpoint 4 does not “slide”.
• Finally, the firmware chooses to reconfigure the Endpoint 2, but with a bigger size. The
• the data of Endpoint 0 are never lost whatever the activation or deactivation of the higher
• Deactivate and reactivate the same Endpoint with the same parameters does not lead to a
• CFGOK is set by hardware even in the case that there is a “conflict” in the memory allocation.
• In the “idle” mode, the pad is put in low power consumption mode.
• In the “active” mode, the pad is working.
Endpoints
reserved in the DPRAM.
the controller.
controller reserved the memory after the endpoint 1 memory and automatically “slide” the
Endpoint 3. The Endpoint 4 does not move and a memory conflict appear, in that both
Endpoint 3 and 4 use a common area. The data of those endpoints are potentially lost.
Endpoint. Its data is lost if it is deactivated.
“slide” of the higher endpoints. For those endpoints, the data are preserved.
activation
4
3
2
1
0
Allocation and reorganization USB memory flow
Endpoint Disable
Free memory
(ALLOC=1)
EPEN=0
4
3
1
0
Free its memory
Free memory
Lost memory
(ALLOC=0)
4
3
1
0
AT90USB82/162
2 (bigger size)
Free memory
Activatation
Endpoint
3
1
0
4
Conflict
191
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