User's Manual

Ph
o
Ad
d
电
话
地
址
o
ne: [phone]
5
d
ress : 1879 Lund
y
话
：[phone]
址
：天津市华苑
产
4.5.2
Note
s
- R
P
- R
R
4.6 Exter
A
n externa
crystal osci
The accura
5
30 | Fax: 408-21
3
y
Ave, ste. 138, Sa
n
5100 | 传真：+8
6
产
业区海泰西路 1
8
Internal
R
s
:
P
U
ranges fro
m
R
ST
should b
e
nal LPO In
p
l source mu
s
llator). The
s
cy of the slo
w
1 GPIO1
2 GPIO2
3 GPIO3
4 GPIO4
5 GPIO5
6 GPIO6
7 GND
Ext 32.768
K
3
-9533 | E-mail: i
n
n
Jose, CA 95131
6
022-83945100
转
8
号西 3B-202（
3
R
eset Circu
m
30K ohm
t
e
from 1K oh
m
p
ut Circuit
s
t supply th
e
s
ource must
w
clock freq
u
15 LPO
K
Hz Clock In
p
n
fo@ampedrftech.
c
转
111 | E-mail: inf
o
3
00384）
it:
t
o 50K ohm
i
m
to 10K oh
m
e
slow clock
be a digital
s
u
ency must
b
TXD 14
RXD 13
RTS 12
CTS 11
RESET 10
BOOT0 9
VIN 8
p
ut (LPO)
c
om
o
cn@ampedrftech
i
nternally.
m
and conne
c
s
ignal in the
b
e 32.768 K
H
.com
c
t to the LP
O
range of 0 t
o
H
z ±150 pp
m
O
pin (for e
x
o
1.8 V.
m
for Blueto
o
LPO Para
m
Frequency:
3
Tolerance: 1
5
Voltage Lev
e
Lo
w
Hig
h
Input Capaci
t
x
ample, the
h
o
th use.
m
eters:
3
2.768 KHz
5
0 ppm
e
ls:
w
: 0.1 V
h
: 1.8 V
tance: 2.5 pF
h
ost or exte
r
maximum
12
r
nal