AT90USB1287-AU Atmel, AT90USB1287-AU Datasheet - Page 447
AT90USB1287-AU
Manufacturer Part Number
AT90USB1287-AU
Description
IC AVR MCU 128K 64TQFP
Manufacturer
Atmel
Series
AVR® 90USBr
Specifications of AT90USB1287-AU
Core Processor
AVR
Core Size
8-Bit
Speed
16MHz
Connectivity
EBI/EMI, I²C, SPI, UART/USART, USB, USB OTG
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
48
Program Memory Size
128KB (128K x 8)
Program Memory Type
FLASH
Eeprom Size
4K x 8
Ram Size
8K x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
64-TQFP, 64-VQFP
Processor Series
AT90USBx
Core
AVR8
Data Bus Width
8 bit
Data Ram Size
8 KB
Interface Type
2-Wire/SPI/USART
Maximum Clock Frequency
20 MHz
Number Of Programmable I/os
48
Number Of Timers
4
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
3rd Party Development Tools
EWAVR, EWAVR-BL
Development Tools By Supplier
ATAVRDRAGON, ATSTK500, ATSTK600, ATSTK525, ATAVRISP2, ATAVRONEKIT, AT90USBKEY, ATEVK525, ATAVRQTOUCHX
Minimum Operating Temperature
- 40 C
On-chip Adc
8-ch x 10-bit
Controller Family/series
AVR USB
No. Of I/o's
48
Eeprom Memory Size
4KB
Ram Memory Size
8KB
Cpu Speed
20MHz
Rohs Compliant
Yes
For Use With
ATSTK600-TQFP64 - STK600 SOCKET/ADAPTER 64-TQFP770-1007 - ISP 4PORT ATMEL AVR MCU SPI/JTAGATSTK525 - KIT STARTER FOR AT90USBAT90USBKEY2 - KIT DEMO FOR AT90USB
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
AT90USB1287-16AU
AT90USB1287-16AU
AT90USB1287-16AU
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
AT90USB1287-AU
Manufacturer:
ATMEL
Quantity:
1 459
Part Number:
AT90USB1287-AU
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
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36.4
7593K–AVR–11/09
AT90USB1287/6 Third Release
5.
4. Transient perturbation in USB suspend mode generates overconsumption
3. Spike on TWI pins when TWI is enabled
2. High current consumption in sleep mode
1. Asynchronous timer interrupt wake up from sleep generates multiple interrupts
• Incorrect CPU behavior for VBUSTI and IDTI interrupts routines
• Transient perturbation in USB suspend mode generates over consumption
• Spike on TWI pins when TWI is enabled
• High current consumption in sleep mode
• Async timer interrupt wake up from sleep generate multiple interrupts
The CPU core may incorrectly execute the interrupt vector related to the VBUSTI and IDTI
interrupt flags.
Problem fix/workaround
Do not enable these interrupts, firmware must process these USB events by polling VBUSTI
and IDTI flags.
In device mode and when the USB is suspended, transient perturbation received on the
USB lines generates a wake up state. However the idle state following the perturbation does
not set the SUSPI bit. The internal USB engine remains in suspend mode but the USB differ-
ential receiver is still enabled and generates a typical 300µA extra-power consumption.
Detection of the suspend state after the transient perturbation should be performed by soft-
ware (instead of reading the SUSPI bit).
Problem fix/workaround
USB waiver allows bus powered devices to consume up to 2.5mA in suspend state.
100 ns negative spike occurs on SDA and SCL pins when TWI is enabled.
Problem Fix/workaround
No known workaround, enable AT90USB64/128 TWI first, before the others nodes of the
TWI network.
If a pending interrupt cannot wake the part up from the selected mode, the current consump-
tion will increase during sleep when executing the SLEEP instruction directly after a SEI
instruction.
Problem Fix/workaround
Before entering sleep, interrupts not used to wake up the part from sleep mode should be
disabled.
If the CPU core is in sleep mode and wakes-up from an asynchronous timer interrupt and
then goes back into sleep mode, it may wake up multiple times.
Problem Fix/workaround
Incorrect CPU behavior for VBUSTI and IDTI interrupts routines
AT90USB64/128
447
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