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7-10
A
Main Board Circuit Diagram: MT8555-Flash
3.3V
U7E
U7E
J13
W2
DVCC33_IO_5
STXN
J14
W1
DVCC33_IO_5
STXP
Y8
DVCC33_IO_2
AA8
Y2
DVCC33_IO_2
SRXP
J18
Y1
DVCC33_IO_3
SRXN
J19
DVCC33_IO_3
N8
DVCC33_IO
P8
Y4
SREXT
DVCC33_IO
SREXT
T8
DVCC33_IO
Y5
AVDD33_SATA
AVDD33_SATA
Y3
AVDD12_SATA1
AVDD12_SATA1
W6
AVSS12_SATA1
4
AVSS12_SATA1
SFCS
AH5
SFCS
SFCK
AF5
SFCK
SFDI
AG5
SFDI
AH4
SFDO
SFDO
AA3
AVDD33_USB_1P_1
AVDD33_USB_1P_1
NFALE
AF4
AA4
AVDD33_USB_2P_2
NFALE
AVDD33_USB_2P_2
NFCEN
AH2
NFCEN
AG3
NFCLE
NFCLE
NFRBN
AE3
C152
C152
NFRBN
0.1uF/16V/X7R
0.1uF/16V/X7R
NFREN
AD4
AA6
NFREN
AVSS33_USB_1P_1
NFWEN
AG4
AA5
NFWEN
AVSS33_USB_2P_2
NFCEN2
AD5
NFCEN2
NFRBN2
AE4
NFRBN2
NFD0
AG2
NFD0
NFD1
AH1
AB3
AVDD12_USB_1P_1
NFD1
AVDD12_USB_1P_1
NFD2
AF3
AC4
AVDD12_USB_2P_1A
NFD2
AVDD12_USB_2P_1A
NFD3
AG1
NFD3
NFD4
AF2
NFD4
NFD5
AF1
AB6
NFD5
AVSS12_USB_1P_1
NFD6
AE2
AB5
NFD6
AVSS12_USB_2P_1A
NFD7
AE1
NFD7
AB2
USBP0
USB_1P_DP
GPIO0
F9
AB1
USBM0
GPIO0
USB_1P_DM
GPIO1
E9
GPIO1
GPIO2
G9
AC2
USBP1
GPIO2
USB_2P_DP1
GPIO3
D9
AC1
USBM1
GPIO3
USB_2P_DM1
GPIO4
AD6
GPIO4
AE6
AD2
USBP2
GPIO5
USB_2P_DP0
AE5
AD1
USBM2
GPIO6
USB_2P_DM0
AC7
GPIO7
AC3
USB_1P_VRT
USB_1P_VRT
AD3
USB_2P_VRT
USB_2P_VRT
MCU_SCL
B10
12,8
MCU_SCL
SCL
MCU_SDA
C10
E5
AVDD12_COM
3
12,8
MCU_SDA
SDA
AVDD12_COM
E6
AVDD12_REC
AVDD12_REC
C160
C160
0.1uF/16V/X7R
0.1uF/16V/X7R
TDO
AF6
F7
TDO
AVSS12_COM
TRST_
AF7
G7
TRST_
AVSS12_REC
TDI
AD8
TDI
TMS
AE7
TMS
TCK
AD7
TCK
C5
AVDD33_COM
AVDD33_COM
F5
AVDD33_REC
AVDD33_REC
D4
AVDD33_LD
AVDD33_LD
EFPWRQ
AC9
C164
C164
EFPWRQ
0.1uF/16V/X7R
0.1uF/16V/X7R
D5
AVSS33_COM
C4
AVSS33_LD
F6
AVSS33_REC
B3
TXVN_0
TXVN_0
A2
TXVP_0
TXVP_0
A4
TXVN_1
TXVN_1
B4
TXVP_1
TXVP_1
A5
TANA_0
TANA_0
B5
TANA_1
TANA_1
D6
ET_REXT
REXT
2
MT8555_0825_A
MT8555_0825_A
ETHERNET PHY
U14
U14
8
TXVN_1
RX-
RXN
7
CTR
RCT
TXVP_1
6
RX+
RXP
5
NC
NC
4
NC
NC
3
TXVN_0
TX-
TXN
2
CTT
TCT
TXVP_0
1
TX+
TXP
16P/SMD/H1245
16P/SMD/H1245
C179
C179
C180
C180
0.1uF/25V/Y5V
0.1uF/25V/Y5V
0.1uF/25V/Y5V
0.1uF/25V/Y5V
1
A
B
3.3V
R402
R402
0
0
C146
C146
C147
C147
R94
R94
0.1uF/16V/X7R
0.1uF/16V/X7R
4.7uF/10V/Y5V
4.7uF/10V/Y5V
453/1%
453/1%
1.2V
R407
R407
0
0
C402
C402
C149
C149
0.1uF/16V/Y5V
0.1uF/16V/Y5V
4.7uF/10V/Y5V
4.7uF/10V/Y5V
3.3V
R400
R400
0
0
R98
R98
0
0
C153
C153
C154
C154
C155
C155
4.7uF/10V/Y5V
4.7uF/10V/Y5V
0.1uF/16V/X7R
0.1uF/16V/X7R
4.7uF/10V/Y5V
4.7uF/10V/Y5V
1.2V
R100
R100
0
0
R101
R101
0
0
C156
C156
C157
C157
C158
C158
C159
C159
0.1uF/16V/X7R
0.1uF/16V/X7R
0.1uF/25V/Y5V
0.1uF/25V/Y5V
0.1uF/16V/X7R
0.1uF/16V/X7R
4.7uF/10V/Y5V
4.7uF/10V/Y5V
R102
R102
5.1K/1%
5.1K/1%
R103
R103
5.1K/1%
5.1K/1%
1.2V
C161
C161
C162
C162
C163
C163
4.7uF/10V/Y5V
4.7uF/10V/Y5V
0.1uF/16V/X7R
0.1uF/16V/X7R
4.7uF/10V/Y5V
4.7uF/10V/Y5V
3.3V
R429
R429
0
0
R108
R108
0
0
R113
R113
0
0
C165
C165
C166
C166
C167
C167
C168
C168
C169
C169
4.7uF/10V/Y5V
4.7uF/10V/Y5V
0.1uF/16V/X7R
0.1uF/16V/X7R
4.7uF/10V/Y5V
4.7uF/10V/Y5V
0.1uF/16V/X7R
0.1uF/16V/X7R
4.7uF/10V/Y5V
4.7uF/10V/Y5V
TP405
TP405
TP406
TP406
R514
R514
0
0
USB_EN2#
R125
R125
24K/1%
24K/1%
P2
P2
8
9
N/C
GND
C174
C174
7
10
N/C
GND
9
RD-
10
6
0.1uF/25V/Y5V
0.1uF/25V/Y5V
RX-
11
RD+
12
5
C935
C935
N/C
13
14
4
TD-
N/C
15
0.1uF/25V/Y5V
0.1uF/25V/Y5V
16
TD+
3
RX+
2
TX-
1
TX+
RJ45 JACK
RJ45 JACK
R580
R580
R133
R133
R134
R134
R579
R579
75/1%
75/1%
75/1%
75/1%
75/1%
75/1%
75/1%
75/1%
LAN_GND
C550
C550
NC/100pF/2KV
NC/100pF/2KV
R583
R583
75/1%
75/1%
B
C
D
3.3V
BE
ICE
TRST_
R410
R410
33
33
TRST1
8
8
TDI
R423
R423
33
33
TDI1
7
7
TMS
R438
R438
33
33
TMS1
6
6
5
TCK
R439
R439
33
33
TCK1
5
4
4
TDO
R440
R440
33
33
TDO1
3
3
2
2
1
1
J2
J2
8PIN/1.0mm
8PIN/1.0mm
3.3V
C86
C86
C87
C87
0.1uF/16V/X7R
0.1uF/16V/X7R
0.1uF/16V/X7R
0.1uF/16V/X7R
C88
C88
C89
C89
C90
C90
0.1uF/16V/X7R
0.1uF/16V/X7R
0.1uF/16V/X7R
0.1uF/16V/X7R
0.1uF/16V/X7R
0.1uF/16V/X7R
3.3V
C91
C91
C92
C92
C93
C93
C94
C94
0.1uF/16V/X7R
0.1uF/16V/X7R
0.1uF/16V/X7R
0.1uF/16V/X7R
0.1uF/16V/X7R
0.1uF/16V/X7R
0.1uF/16V/X7R
0.1uF/16V/X7R
3.3V
C97
C97
C98
C98
C99
C99
C100
C100
0.1uF/16V/X7R
0.1uF/16V/X7R
0.1uF/16V/X7R
0.1uF/16V/X7R
0.1uF/16V/X7R
0.1uF/16V/X7R
0.1uF/16V/X7R
0.1uF/16V/X7R
VCC
VCC_D
CB1
CB1
0.1uF/16V/Y5V
0.1uF/16V/Y5V
U13
U13
7
USB Enable (Front)
IN
USB_EN2
1
/EN1
OUT2
USB_OC2#
2
/OC1
OUT1
USB_OC0#
3
USB Enable (Rear)
/OC2
GND
Q214
Q214
R515
R515
NC/0
NC/0
USB_EN0
4
/EN2
NC/NPN_3DG3904M
NC/NPN_3DG3904M
G556B1
G556B1
USB_EN0#
Q215
Q215
SO8
SO8
NPN_3DG3904M
NPN_3DG3904M
USBP1
USBM1
PCB TOP USB TESET POINT
USB_VCC3
USB_VCC1
TP26
TP26
C178
C178
USBP0
TP27
TP27
+
+
USBM0
TP28
TP28
CE15
CE15
NC/100uF/16V
NC/100uF/16V
0.1uF/25V/Y5V
0.1uF/25V/Y5V
PCB BTMP USB TESET POINT
USB_VCC2
TP29
TP29
USBP1
TP30
TP30
USBM1
USBM1
TP31
TP31
USBP1
USB_VCC3
TP32
TP32
USBP2
TP33
TP33
USBM2
TP34
TP34
NFALE
NFALE_R
NFCEN
NFCEN_R
NFCLE
NFCLE_R
NFRBN
NFRBN_R
NFREN
NFREN_R
NFWEN
NFWEN_R
GPIO0
R441
R441
470
470
USB_EN0#
GPIO1
R442
R442
33
33
USB_OC0#
GPIO2
R445
R445
470
470
USB_EN2#
GPIO3
R447
R447
33
33
USB_OC2#
GPIO4
TGPIO4
R448
R448
NC/33
NC/33
TP91
TP91
C
D
7-10
E
3.3V
NAND Flash
U12
U12
48
1
NC
NC
47
2
NC
NC
46
3
NC
NC
45
4
NC
NC
44
5
NFD7
DQ7
NC
NFD6
43
6
DQ6
R/B2
NFD5
42
7
NFRBN_R
DQ5
R/B1
NFD4
41
8
NFREN_R
DQ4
RE
40
9
NFCEN_R
NC
CE1
39
10
NC
CE2
38
11
PRE
NC
C150
C150
37
12
C151 0.1uF/16V/X7R
C151 0.1uF/16V/X7R
VCC
VCC
36
13
VSS
VSS
0.1uF/16V/X7R
0.1uF/16V/X7R
35
14
NC
NC
34
15
NC
NC
33
16
NFCLE_R
NC
CLE
NFD3
32
17
NFALE_R
DQ3
ALE
NFD2
31
18
NFWEN_R
DQ2
WE
NFD1
30
19
NFWP#
R99
R99
0
0
DQ1
WP
29
20
NFD0
DQ0
NC
28
21
NC
NC
27
22
NC
NC
26
23
NC
NC
25
24
3.3VRESET#
3.3VRESET#
NC
NC
NAND 256MB
NAND 256MB
SFCS
SD_DAT2
SD_DAT2
9
SFCK
SD_DAT3
SD_DAT3
9
SFDI
SD_DAT1
SD_DAT1
9
SFDO
SD_DAT0
SD_DAT0
9
NFCEN2
SD_CLK
SD_CLK
9
NFRBN2
NFRBN2
SD_CMD
SD_CMD
9
3.3V
R106
R106
Hardware trap
10K
10K
NFWEN_R
NFREN_R
NFCLE_R
NFCEN2
NFCEN_R
NFALE_R
5
USB_VCC3
8
USB_VCC1
To Front USB
6
+
+
CE11
CE11
CB2
CB2
USBP2
4
4
100uF/16V
100uF/16V
0.1uF/16V/Y5V
0.1uF/16V/Y5V
USBM2
3
3
2
2
USB_VCC1
1
1
C372
C372
0.1uF/25V/Y5V
0.1uF/25V/Y5V
XP6
XP6
4PIN/2.0mm
4PIN/2.0mm
4
4
3
3
2
2
3.3V
VCC 5V
1
1
VCC
XP3
XP3
R965
R965
NC/0
NC/0
NC/4PIN/2.0mm
NC/4PIN/2.0mm
Q211
Q211
TR1
TR1
PNP_PBSS5320T
PNP_PBSS5320T
FB18
FB18
10/2A
10/2A
PTC/0.75A
PTC/0.75A
1
VCC
2
D-
3
D+
4
IPOD_VCC
GND
R966
R966
R968
R968
180
180
180
180
P3
P3
USB-A/WT
USB-A/WT
R964
R964
NC/4.7K
NC/4.7K
Q210
Q210
9
WiFi_EN#
NPN_3DG3904M
NPN_3DG3904M
R971
R971
4.7K
4.7K
VCC_D
E
4
3.3VRESET#
2
3
2
PTC
USB_VCC2
1
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