AT90USBKEY Atmel, AT90USBKEY Datasheet - Page 9

• Manufacturer Part Number: AT90USBKEY
• Description: MCU, MPU & DSP Development Tools Demo board f/AVR MCU & AT90USB
• Manufacturer: Atmel

Specifications of AT90USBKEY

• Processor To Be Evaluated: AT90USB AVR
• Data Bus Width: 8 bit
• Interface Type: USB
• Silicon Manufacturer: Atmel
• Core Architecture: AVR
• Core Sub-architecture: AVRUSB
• Silicon Core Number: AT90USB
• Kit Contents: Board CD Docs
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: AT90USBKEY2

2.4
2.4.1
2.4.2
AT90USBKey Hardware User Guide
On-board Resources
USB
Joystick
The AVRUSBKey is supplied with a standard USB mini A-B receptacle. The mini AB
receptacle allows to connect both a mini A plug or a mini B plug connectors.
Figure 2-5 . USB mini A-B Receptacle
When connected to a mini B plug, the AT90USB operates as an “USB device” (the ID
pin of the plug is unconnected) and when connected to a mini A plug, the AT90USB
operates as a “USB host” (the ID pin of the A plug is tied to ground).
The 4+1 ways joystick offers an easy user interface implementation for a USB
application (it can emulate mouse movements, keyboard inputs...).
Pushing the push-button causes the corresponding signal to be pulled low, while
releasing (not pressed) causes an H.Z state on the signal. The user must enable
internal pull-ups on the microcontroller input pins, removing the need for an external
pull-up resistors on the push-button.
Figure 2-6 . Joystick Schematic
J3
USB_MiniAB
1
1
1
2
2
2
1-V_BUS
SW3
SW3
SW3
TPA511G
TPA511G
TPA511G
5-GND
Com1
Com1
Com1
Com2
Com2
Com2
SHIELD
SHIELD
SHIELD
SHIELD
3-D+
2-D-
4-ID
CR1
VBUS
Select
Select
Select
Down
Down
Down
Right
Right
Right
Lef t
Lef t
Lef t
Up
Up
Up
VBUS
5
5
5
7
7
7
3
3
3
6
6
6
4
4
4
CR2
PB5
PB5
PB5
PB6
PB6
PB6
PB7
PB7
PB7
PE4
PE4
PE4
PE5
PE5
PE5
R2 22
R3 22
C7
1uF
R4 0
PB[7..0]
PB[7..0]
PB[7..0]
PE[7..0]
PE[7..0]
PE[7..0]
Using the AT90USBKey
VBUS
D-
D+
GND
UCAP
VBUS
UID
7627A–AVR–04/06
2-9