Premier PF-2821TFT, User Manual

Page: 14 / 14

For CT951, SDRAM,
SPI.
For CT675 & NI
M.
RTC Circuit
SCHEMATIC
DIAGRAM
MODEL NO.: PF-2821TFT P
OWER & RTC SCH
NOTE: subject to change without no
tice for improvement!
DC
_
IN
R
T
C
_
R
S
T
[1]
N
IM_
I2
C
_
S
D
A
[1]
N
IM_
I2
C
_
S
C
K
[1]
D
G
ND
+
12V
G
ND
+
5
VD
+
1
.8V
D
G
ND
G
ND
+
3
V3
+
3
.3V
+
3
.3V
G
ND
D
G
ND
+
12V
D
G
ND
D
G
ND
D
G
ND
D
G
ND
+
5V
G
ND
+
5
VD
G
ND
G
ND
+
1
2V
C
219
100n
D
19
1
N
4148
2 1
E
C
57
220u
/10V
L79 F
B
80
/0805
R
311
100
F
4
F
U
SE
E
C
53
220u
/25V
C
228
100n
R
307
10K
D
21
1
N
4001
2
1
C
218
100n
L58 F
B
80
/0805
E
C
59
220u
/10V
R
300
100K
C
225
100n
L57 F
B
80
/0805
U
20
M
PS
1410
(C
A
T
7105)
1 2 3 4
5 6 7 8
BS V
in
V
sw
G
ND
FB C
omp
EN S
y
nc
R
384
0R
R
297
33
C
232
100n
R
30
2
20K
E
C
76
47u
/10V
R
306
10K
C
22
0
22n
U
30
A
IC
1117
-3
.3V
1
2
3
GND
VO
VI
C
217
22p
D
20
B
320
A
/S
MA
2 1
E
C
54
X
H
414
H
1
V
01E
C
215
100n
Y2 32
.768
K
Hz
E
C
55
47u
/10V
C
223
100p J
26
P
O
W
E
R
J
A
CK
3 1 2
3 1 2
R
304
220
C
221
22n
C
226
100n
L60 22uH
E
C
56
220u
/25V
L59 10uH
D
22
1
N
4001
2
1
U
21
A
IC
1117
-A
DJ
1
2
3
GND
VO
VI
C
213
100n
C
222
100n
C
216
22p
C
214
100n
+
E
C
58
100u
/10V
D
18
B
320
A
/S
MA
2
1
U
19
D
S
1302
(S
O
8)
1 2 3 4
8 7 6 5
V
CC2
X1 X2 G
ND
V
CC1
S
C
LK
I/O
R
ST
R
30
1
11K
C
224
100n