7.
Appendix
7.1
Schematic
Figure 7-1. ATtiny3217 Curiosity Nano Schematic
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
D
D
C
C
B
B
A
A
2
of
4
A
Tt
in
y3
21
7
C
ur
io
si
ty
N
an
o
27
/1
1/2019
A
Tt
in
y3
21
7_
C
uri
os
it
y_
N
an
o_
Targe
t_
M
C
U
.S
ch
D
oc
Pr
oj
ec
t T
itle
PC
B
Asse
mbly
Numbe
r:
PC
B
A
Re
vis
ion:
File:
PCB
Numb
er:
PC
B
Re
vi
si
on
:
D
es
ig
ne
d
w
ith
Dra
wn
By
:
M.LOPER
Sh
ee
t T
itle
A
T
tin
y32
17
C
ur
ios
ity
Na
no
Engineer:
PB
/
TF
A08-3055
2
Size
A
3
A09-3333
2
Page:
Date:
Alt
ium
.co
m
PA6_A
DC0_AIN6
PA7_A
DC0_AIN7
PA3_LED0_TCA0_WO3
PB6
PB5_ADC0_AIN8
PB4_TCA0_WO1
PC4_ADC1_AIN10
PC2_SPI0_MOSI
PC1_SPI0_MISO
PC0_SPI0_S
CK
PB0_I2C0_SCL
PB1_I2C0_SDA
PB
2_
T
OSC2
GND
V
C
C
_T
ARGET
100n
C200
PC3_SPI0_S
S
PC0_SPI0_S
CK
PC1_SPI0_MISO
PC2_SPI0_MOSI
PB0_I2C0_SCL
PB1_I2C0_SDA
PA
2_
U
SA
R
T0_RX
PA
1_
U
SA
R
T0_TX
PC
5_A
D
C
1_
A
IN
11
PC4_ADC1_AIN10
PA4_ADC0_AIN4
PB4_TCA0_WO1
PA5_TCA0_WO5
PA6_ADC0_AIN6
PB6
PB5_ADC0_AIN8
R203
U
SE
R
L
E
D
V
C
C
_T
ARGET
PC3_SPI0_SS
GND
U
SE
R
B
U
T
T
O
N
PB7_SW0
PA7_ADC0_AIN7
1k
R202
YELLOW
LED
SML-D12Y1WT86
2
1
D200
TS604VM1-035CR
1
3
4
2
SW200
GND
GND
GND
PA3_LED0_TCA0_WO3
PB7_SW0
BLM18PG471SN1
L200
2.
2u
F
C205
GND
DB
G0
CD
C_
UA
RT
TX
RX
U
A
R
T
CDC_TX
CDC_RX
DBG2
DB
G1
DB
G3
DB
G2
D
E
B
U
G
GE
R
C
O
N
N
E
C
T
IO
N
S
DBG1
DBG3
DBG0
VO
FF
ID
_S
YS
ID_SYS
VOFF
TA
R
GE
T
B
U
L
K
PB7_SW0
PA3_L
ED0_TCA0_WO3
VBUS
PB
3_
T
OSC1
PC5_ADC1_AIN1
1
PA0_U
PDI
GND
C
D
C
R
X
3
CDC
T
X
4
D
B
G
1
5
D
B
G
2
6
0
T
X
7
1
R
X
8
2 SD
A
9
3 S
CL
10
4
M
OS
I
11
5
M
IS
O
12
6
S
C
K
13
7
S
S
14
GN
D
15
0
(T
X
)
16
1 (RX
)
17
D
B
G
3
32
D
B
G
0
31
GN
D
30
V
C
C
29
P
W
M
3
24
A
D
C
2
23
A
D
C
1
22
A
D
C
0
21
GN
D
20
3
19
2
18
A
D
C
7
28
A
D
C
6
27
A
D
C
5
26
P
W
M
4
25
DEBUGGER
TARGET
ID
2
VOFF
33
R
E
SE
R
VE
D
1
VB
US
34
CNAN
O34-
pin
edg
e co
nne
ctor
J200
PB
2_
U
SA
R
T0_TX
PB
3_
U
SA
R
T0_RX
PB
2_
U
SA
R
T0_TX
PB
3_
U
SA
R
T0_RX
PA1_U
SART0_TX
PA
2_
U
SA
R
T0_RX
PA4_ADC0_AIN4
PB7_SW0
PA5_TCA0_WO5
PA0_UPDI
J203
J201
J204
J205
J206
A
Ttiny3217
J202
GND
GND
32
kH
z
C
R
Y
ST
A
L
J209
PB3_TOSC1
PB2_TOSC2
J210
J2
11
J212
J213
PB
2_
U
SA
R
T0_TX
PB
3_
U
SA
R
T0_RX
NC
13pF
C204
N
.M
10p
C203
N
.M
VCC_EDGE
VCC_EDGE
A
T
ti
ny
32
17
U
PD
I
G
PI
O
1
G
PI
O
0
N
A
D
B
G0
D
B
G1
D
B
G2
D
B
G3
D
eb
ug
ge
r
C
D
C
T
X
C
D
C
R
X
U
SA
R
T
0 R
X
U
SA
R
T
0
T
X
V
T
G
1.
8V
-
5.
5V
PA
3
P
B
7
-
PA
0
P
B
2
P
B
3
N
am
e
P
in
32.
76
8kH
z
XC200
N
.M
PA
2
1
PA
3(
CL
KI
)
2
GN
D
3
VC
C
4
PA
4
5
PA
5
6
PA6
7
PA7
8
PB7
9
PB6
10
PB5
11
PB4
12
(T
OS
C1
)PB
3
13
(T
OS
C2
)PB
2
14
PB
1
15
PB
0
16
PC
0
17
PC
1
18
PC2
19
PC3
20
PC4
21
PC5
22
(U
PD I/
RES
ET)
PA0
23
PA1
24
PA
D
25
A
Ttiny3217-MFR
U200
1k
N
O
T
E
o
n
U
A
R
T/CDC:
RX
/T
X
on
the
h
ea
de
r
de
no
te
s
th
e
in
put
/o
utp
ut
di
re
cti
on
of
th
e
sig
nal
re
sp
ec
ti
ve
to
it
's
s
ou
rc
e.
CD
C T
X
is
ou
tp
ut
fr
om
the
DEB
UGG
ER.
CD
C
RX
is
in
pu
t to
the
D
E
BU
GG
ER
.
TX
is
ou
tp
ut
f
ro
m
th
e
TA
R
G
E
T
d
ev
ice
.
RX
is
in
put
to
th
e T
A
R
G
E
T
d
ev
ic
e.
NO
TE
o
n
I2
C:
No
p
ul
l-
up
s
on
b
oa
rd
. Pu
ll
-u
ps
s
ho
ul
d
be
mo
un
te
d
cl
os
e
to
s
la
ve
d
ev
ic
e(
s)
.
Cryst
al d
atash
eet:
Cc
ry
st
al
=
7
pF
m
ax
E
S
R
=
7
0k
Ohm
Ac
cur
ac
y
±
20ppm
A
Ttiny
3217 d
atash
eet:
C
xi
n
=
5
.5
pF
C
xo
ut
=
5
.5
pF
C
l
≈
1/(
(
1/
5.
5p
F)
+
(
1/
5.5
pF
)
)
≈
2.
75
pF
M
ax
im
um
E
S
R
@
1
2.
5p
F
=
4
0k
Ohm
M
ax
im
um
E
SR
@
7
.5
pF
=
8
0k
Ohm
Es
ti
ma
te
d
Cp
cb
=
0
.5
pF
Esti
mat
ed l
oad
C
=
2
(
C
cr
ys
ta
l-
Cp
ar
a -
C
pc
b)
C
=
2
(
7p
F
-
2
.7
5p
F
-
0
.5
pF
)
C
=
7
.5
pF
Sel
ec
ted
in
de
sig
n a
ft
er
ver
ifi
ca
tio
n
C
=
10
/13
pF
ATtiny3217
Appendix
©
2020 Microchip Technology Inc.
User Guide
DS40002193A-page 30
