ViewSonic N4251w-1M Service Manual page 84

8.26. SYSTEM EEPROM
SB33B
R425 R503
4.7K 4.7K
RXD
TXD
PCRXD
PCTXD
TP72
NEW USB DOWNLOAD I/F
R512 0
I143
SDA0
1
B0 VCC
DTVU0TX
2
B2 A2
PCTXD
3
BN A1
4
B3 AN
TXD
5
B1 A0
6
INH A3
7
VEE S0
8
GND S1
CD4052
SOP16/SMD
ViewSonic Corporation
R482
(NC)R
P115
1
2
3
4
DLSW1
5
DLSW2
6
(NC)6x1 W/HOUSING
6P200VM
SB33B
R845 R846
10K 10K
5VSB
SCL0
16
DTVU0RX SDA0
15
RXD
14
PCRXD
13
SCL0
R513 0
12
11
DLSW1
10
DLSW2
9
R489 R490
47K 47K
81
N4251w-1M
Confidential - Do Not Copy
RESET# Circuit
SCL
SCL 3,10,13,23
SDA
SDA 3,10,13,23
PCTXD
PCTXD 22
PCRXD
PCRXD 22
DLSW1
DLSW1 22
DLSW2
DLSW2 22
TXD
TXD 3
RXD
RXD 3
URST_1
URST_1 3
GPIO4
GPIO4 3
DTVU0TX
DTVU0TX 12
DTVU0RX
DTVU0RX 12
SCL0
SCL0 3
SDA0
SDA0 3
SYSTEM EEPROM
SB33B
I144
C742
1 8
NC VCC
0.1U SYSROMWP
2 7
NC WP
SCL
3 6
NC SCL
SDA
4 5
GND SDA
EEPROM 24C16
SOP8/SMD
SYSTEM EEPROM
SB33B
R483
10K C741
+
100U/16V
URST_1
Q123
R484
1
B
SOT
3
C
10K
23 2
E
D137 R485
MMBT3904 10K
C791 LL4148
NC
SB33B
R486
20K
L : Write Protect EEPROM
H : Normal Download
Q124
GPIO4
R487 10K
1
B
SOT
3
C
23
2
E
R488
(NC)10K
MMBT3904