AT90USB1287-MUR Atmel, AT90USB1287-MUR Datasheet - Page 291
AT90USB1287-MUR
Manufacturer Part Number
AT90USB1287-MUR
Description
MCU AVR 128K FLASH 16MHZ 64QFN
Manufacturer
Atmel
Series
AVR® 90USBr
Datasheet
1.AT90USB646-MU.pdf
(461 pages)
Specifications of AT90USB1287-MUR
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-VQFN Exposed Pad, 64-HVQFN, 64-SQFN, 64-DHVQFN
Processor Series
AT90USBx
Core
AVR8
3rd Party Development Tools
EWAVR, EWAVR-BL
Development Tools By Supplier
ATAVRDRAGON, ATSTK500, ATSTK600, ATSTK525, ATAVRISP2, ATAVRONEKIT, AT90USBKEY, ATEVK525, ATAVRQTOUCHX
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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23.4
23.5
23.6
7593K–AVR–11/09
Device Detection
Pipe Selection
Pipe Configuration
USB host controller state after an hardware reset is ‘Reset’. When the USB controller is enabled
and the USB Host controller is selected, the USB controller is in ‘Idle’ state. In this state, the
USB Host controller waits for the Device connection, with a minimum power consumption.
The USB Pad should be in Idle mode. The macro does not need to have the PLL activated to
enter in ‘Host Ready’ state.
The Host controller enters in Suspend state when the USB bus is in Suspend state, i.e. when the
Host controller doesn’t generate the Start of Frame. In this state, the USB consumption is mini-
mum. The Host controller exits to the Suspend state when starting to generate the SOF over the
USB line.
A Device is detected by the USB controller when the USB bus if different from D+ and D- low. In
other words, when the USB Host Controller detects the Device pull-up on the D+ line. To enable
this detection, the Host Controller has to provide the Vbus power supply to the Device.
The Device Disconnection is detected by the USB Host controller when the USB Idle correspond
to D+ and D- low on the USB line.
Prior to any operation performed by the CPU, the Pipe must first be selected. This is done by
setting PNUM2:0 bits (UPNUM register) with the Pipe number which will be managed by the
CPU.
The CPU can then access to the various Pipe registers and data.
The following flow must be respected in order to activate a Pipe:
AT90USB64/128
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