Broadcom
®
March 28, 2014 • MMP920737TAG03-HWUM100-R
Page 17
Schematics
BCM920737TAG-03 WICED Smart Tag Hardware User Manual
Figure 7: Switches and Headers
Switch SW4 pos1-4 ON to use HCI UART
Switch SW4 pos1-4 OFF to run APP mode
UART
Regulator output is set to 1.8V. Can adjust as needed:
Vout = 0.8x(RFB1 + RFB2)/RFB2
Vout = 3.3V RFB1=470K RFB2=150K C22=100pF
Vout = 3.0V RFB1=330K RFB2=120K C22=150pF
Vout = 1.8V RFB1=300K RFB2=240K C22=150pF
SW2 setting for VREG
2-1: Use USB 5V
2-3: Use coincell battery
SWD
I2C HEADER
GPIO HEADERS
SW3 setting for VDDIO
2-1: Use coin cell battery (1.8V-3.0V)
2-3: Use regulated voltage
POWER
RXD_EXT
RXD_EXT
RTS_PUART_FTDI
CTS_PUART_FTDI
TXD_PUART_FTDI
RXD_PUART_FTDI
RTS_EXT
CTS_EXT
TXD_EXT
CTS_EXT
RTS_EXT
TXD_EXT
5V_USB
5V_FTDI
VDDIO
VDDIO_HCI
VREG
VCOIN
REG_IN
5V_USB
VDDIO
VDDIO
VDDIO
VCOIN
VREG
VDDIO_HCI
VDDIO_HCI
3V3_FTDI
VDDIO_HCI
3V3_FTDI
UP_RX
2,5
SCL
2
SDA
2
P15
2,5
P12/P26
2,3
P4
2
P3
2,5
P1
2,5
P2
2
P11/P27
2,3
P32
2,5
P13/P28
2
P8/P33
2,5
P32
2,5
P3
2,5
P1
2,5
UP_TX
2,5
P0
2
P14/P38
2,5
P24
2
P25
2
RXD_FTDI1
4
TXD_FTDI1
4
RXD_FTDI2
4
TXD_FTDI2
4
CTS_FTDI2
4
RTS_FTDI2
4
CTS_FTDI1
4
RTS_FTDI1
4
RESET_N
2
SWDIO
5
SWDCK
5
SWDIO
5
UP_RX
2,5
P15
2,5
UP_TX
2,5
SWDCK
5
P14/P38
2,5
P8/P33
2,5
WP
2
XC9236_ADJ
U13
SON6H
VIN
6
LX
1
FB
3
VSS
5
CE/MODE
4
HS-VSS
H
VSS
2
J8
PBC05SAAN
1
2
3
4
5
R115
10K
RFB1
300K
R122
0
PBC04SAAN
J9
1
2
3
4
RD8
0
INSTALL POSITION A
A
B
C
TP6
R36
10K (DNI)
R121
0
ON
SW4
218-8LPSTR
1
2
3
6
5
4
7
8
9
10
11
12
13
14
15
16
R123
0
R24
0
J7
PBC05SAAN
1
2
3
4
5
U21
MAX3395E
QFEP
I/O_VCC2
9
I/O_VCC3
8
I/O_VCC4
7
GND
5
VCC
11
I/O_VCC1
10
I/O_VL4
4
I/O_VL3
3
I/O_VL2
2
I/O_VL1
1
EN
6
VL
12
HS-GND
H
SW3
SSSS811101
SH2
SH1
2
SH4
SH3
3
1
TP3
R120
0
R124
10K
SW2
SSSS811101
SH2
SH1
2
SH4
SH3
3
1
TP4
RD9
0
INSTALL POSITION A
A
B
C
R116
0
TP8
JP1
1
1
2
2
3
3
4
4
5
5
6
6
G
MTG1
G
MTG2
C25
10uF
TP7
C24
4.7uF
R118
0
U20
MAX3395E
QFEP
I/O_VCC2
9
I/O_VCC3
8
I/O_VCC4
7
GND
5
VCC
11
I/O_VCC1
10
I/O_VL4
4
I/O_VL3
3
I/O_VL2
2
I/O_VL1
1
EN
6
VL
12
HS-GND
H
C22
150pF
R117
0
RFB2
240K
PBC04SAAN
J10
1
2
3
4
TP5
R99
0
R119
0
L2
4.7uH
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