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5
5
4
4
3
3
2
2
1
1
D D
C C
B B
A A
JP1 MCU MODE
SHUNTED = BOOT MODE
OPEN = USER M ODE
POWER
RUNNI NG
STATUS
UART1
RS2 3 2 C
Vcc GND
TARGET
IF
IO/DEBUG
PINS
USB
ST OPPED
S1 Power Selec t
CLO SE = USB BUS POWERED
OPEN = TARGET POWERED
5V/ 3V Volt age Swit ch Det ect
Vdd IN > 4V = 5V MODE
Vdd IN < 4V = 3V MODE
MDECE0641M.DSN
0.6A3
11Thursday,January31,2002
Title
Size DocumentNumber Rev
Date: Sheet
of
CNVSS_CNTL
P_ZOUT
P44_CNTR1
P41_INT0
TXD
CNVss
SCLK
CE
EPMCNTL
P_ZIN
RESET
RXD
VOLTSEL
3VSEL
P40_XCAPCNTL
P43_CNTR0
P42_INT1
P40_XCAPCNTL
Vcc
Vcc
Vcc
Vcc
Vcc
Vcc
Vcc
Vcc
Vcc
Vcc
Vcc
C11
680pF
12
L1
HI0805Q310R
12
Y1
24MHz
1 2
C13
33pF
12
C14
33pF
12
TP1
5010
1
1
TP2
5011
1
1
R8
0
12
R3
470
12
R15
1K
12
R17
10K
12
R16
10K
12
R1
470
12
U3
STF202-30
1
1
6
6
2
2
5
5
3
3
4
4
C12
0.1uF
1 2
R12
4.7K
12
R4
470
12
+
C10
2.2uF
12
J1
MNC20-5K5P10
1
1
2
2
3
3
4
4
7
7
6
6
5
5
8
8
9
9
J2
2400
1
2
3
4
R2
470
12
JP2
22-03-2081
1
2
3
4
5
6
7
8
R20
10K
12
R19
10K
12
R22
4.7K
12
R23
10K
12
R24
100
1 2
R26
100
1 2
R27
100
1 2
J3
103308-1
2
2
1
1
4
4
3
3
6
6
5
5
8
8
7
7
10
10
9
9
R14
10K
12
R5
3.3K
12
R7
1.5K
12
+
C6
2.2uF
12
C4
0.1uF
12
C7
0.1uF
12
C3
0.1uF
12
C1
0.1uF
12
C2
0.1uF
12
D4
SML-LX0603YW
12
D1
SML-LX0603IW
12
D2
SML-LX0603IW
12
D3
SML-LX0603GW
12
R25
100
1 2
OUT
OUT
PG
FB
IN
IN
EN
GND
U2
TPS77433DGK
5
6
8
7
2
1 3
4
R13
4.7K
12
U4
MCP120T-270I/TT
Vdd
2
!RST
1
GND
3
R28
3.3K
12
R21
1.5K
12
JP1
22-03-2021
U1
M37641F8HP
P6_7
73
P6_6
74
P6_5
75
P6_4
76
P6_3
77
P6_2
78
P6_1
79
P6_0
80
P5_7
1
P5_6
2
P5_5
3
P5_4
4
P5_3
5
P5_2
6
P7_4
63
P7_3
64
P7_2
65
P7_1
66
P7_0
67
USB_D+
68
USB_D-
69
EXT_CAP/PWR
70
CNVSS
7
LPF
16
AVSS
17
P4_4
18
P4_3
19
P4_2
20
P4_1
21
P4_0
22
!RTS1/P8_7
23
!CTS1/P8_6
24
URXD1/P8_5
25
UTXD1/P8_4
26
STXD/P8_3
27
SRXD/P8_2
28
SCLK/P8_1
29
!SRDY/P8_0
30
P3_5
33
P3_3
35
P3_2
36
P3_1
37
Vcc
72
VCC
14
AVCC
15
Vss2
71
Vss1
11
P1_7
39
P1_6
40
P1_5
41
P1_4
42
P1_3
43
P1_2
44
P1_1
45
P0_0
54
P0_1
53
P0_2
52
P0_3
51
P0_5
49
P0_6
48
P0_7
47
P1_0
46
P2_7
55
P2_6
56
P2_5
57
P2_4
58
P2_3
59
P2_2
60
P2_1
61
P2_0
62
P3_6
32
P3_7
31
P3_4
34
/RESET
8
P3_0
38
XCout/P5_1
9
XCin/P5_0
10
Xin
12
Xout
13
P0_4
50
Q2
ZXM61P02
1
3 2
C8
0.1uF
12
C15
0.1uF
12
Q1
ZXM61P02
1
3 2
R6
10K
1 2
+
C9
2.2uF
12
OUT
OUT
PG
FB
IN
IN
EN
GND
U5
TPS77433DGK
5
6
8
7
2
1 3
4
D5
1N914
1 3
R29
1K
1 2
S1
AYZ0202AG
2
1
3
5
6
4