Complete Schematics
6-34
STK525 Hardware User Guide
7608A–AVR–04/06
Figure 6-4 . Schematics, 4 of 5
-
C3
0
4.
7uF
VT
G
IN
GN
D
OU
T
U8
LM
340
VBU
S generat
or f
o
r OT
G/
H
OST
m
ode
1
F
<
C
ap Vbus
<
6
F
OT
G Spec
if
ic
at
ion
VBU
S
R2
9
10k
C2
8
4.
7uF
D7
LL4148
C2
7
100nF
GND
1
IN1
2
IN2
3
EN
4
OC
5
OU
T
1
8
OU
T
2
7
OU
T
3
6
U5
T
PS2041A
1
2
JP
4
M1
F
D
V
304P
/F
A
I
R3
3
100k
3.
3V
5V5V
-
C3
1
4.
7uF
1
TP
5
3.
3V
J
P
not
m
ount
ed,
res
e
rv
ed f
o
r f
u
tu
re m
a
s
s
s
to
rage ex
tens
ion
in s
tand alone m
ode
T
PS2041A Vbus
Icc l
im
it
e
r o
p
ti
onnal
W
hen N
o
t M
ount
ed C
los
e Solder Pad
J
P
C
los
ed f
o
r 3.
0<
Vc
c
<
3.
3
1
TP
6
5V
R3
1
124k
1%
1
TP
8
VBU
S
U
6out
=
1
.25*
(1+
R
28/
R
29)
1
2
JP
5
VT
G
STK
VBU
S
VBUS
3.3V
R3
0
100k
1%
Ext
VC
C
1
TP
7
GN
D
SP6
3.
3V
S
T
K
525 M
E
Z
Z
A
N
IN
E
F
O
R
S
T
K
500
STK
Ext
UCA
P
3.
3V
Q2
BC
847B
3.
3V
D8
T
OPLED
LP M
676
P
O
W
E
R L
E
D(
RE
D)
R3
4
1k
Ti
tl
e
Siz
e
D
oc
um
ent
N
u
m
ber
R
e
v
D
a
te
:
S
heet
of
<D
o
c
>
1
.0
POW
ER
A4
44
T
ues
day
, J
anuary
17,
2006
5V
C3
2
220nF
1
2
3
4
5
6
7
8
JP
6
V
CC S
o
u
rc
e
VC
C
-
C3
4
4.
7uF
2
1
3
JP
7
V
BUS
g
e
n
D6
LL4148
R3
2
10k
R3
5
100k
1%
3
1
4
2
-+
U7
D
F
005S
3
2
1
J6
CO
NNE
CT
O
R
JA
CK
P
W
R
Ex
t Pow
e
r Supply
C3
3
100nF
C2
9
33nF
UV
CO
N
VBU
S
OU
T
1
IN
2
GN
D
3
OU
T
4
FA
UL
T
8
S
HDN
7
CC
6
SET
5
U6
LP3982
