ATSTK525 Atmel, ATSTK525 Datasheet - Page 9

KIT STARTER FOR AT90USB

ATSTK525

Manufacturer Part Number
ATSTK525
Description
KIT STARTER FOR AT90USB
Manufacturer
Atmel
Datasheets

Specifications of ATSTK525

Accessory Type
STK500 Expansion Module
Processor To Be Evaluated
AT90USBxxx
Data Bus Width
8 bit
Interface Type
RS-232, USB
Silicon Manufacturer
Atmel
Core Architecture
AVR
Silicon Core Number
AT90USB
Kit Contents
Board Docs
Rohs Compliant
Yes
For Use With/related Products
AT90USB Devices
For Use With
ATEVK525 - ADD ON KIT FOR STK525ATSTK500 - PROGRAMMER AVR STARTER KIT
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
ATSTK525
Manufacturer:
Atmel
Quantity:
135
2.2.3
STK525 Hardware User Guide
Jumper position
“Vbus Gen”
VBUS Generator Setting
“Ext”
“Stk”
External power supply from J6
External power supply from
Expand0/1 (connected to a STK500)
STK525 power supply
When using the AT90USBxxx microcontroller in USB host mode. The STK525 should
provide a 5V power supply over the VBUS pin of its USB mini AB connector.
A couple of transistors on the STK525 allows the UVCON pin of the AT90USBxxx to
control the VBUS generation (See Figure 2-4). In this mode the STK525 is powered by
external power supply source (J6 or STK500 expand0/1 connectors). JP7 allows to
select the 5V source used by the VBUS generator.
Figure 2-4 . VBUS generator schematic
Table 2-2 . VBUS Generator Setting
UVCON
VTG
STK
Ext
This is the default configuration.
The VBUS generator source is the
on-board 5V regulator.
The VBUS generator source is the
STK500.
Note:
The “Vtarget” setting of STK500
should be set to “5V”.
1
3
VBUS gen
R33
100k
JP7
2
Comments
R32
10k
Q2
BC847B
M1
FDV304P/FAI
-
C34
4.7uF
VBUS
Vbus
Vbus
View
Gen
Gen
Using the STK525
7608A–AVR–04/06
2-9

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