Hardware Settings
Broadcom
®
August 27, 2015 • 920737TAG04-HWUM101-RDS
Page 13
BCM920737TAG-04 WICED Smart Tag Hardware User Manual
Hardware Settings
Configurable Resistor Descriptions
Hardware configuration for the Smart Tag board is defined in
Table 5: Configurable Resistor Descriptions
Component
Configuration Description
Comments
RD5
A-C
External LDO DC/DC Converter
RD5 and RD6 must both be in
either A-C or B-C, no mismatch
B-C
Internal DC/DC converter
RD6
A-C
External LDO DC/DC converter
B-C
Internal DC/DC converter
RD7
A-C
PCB monopole antenna
–
B-C
External antenna connector (J1)
R26
Short
External crystal (0.03277 MHz)
R26 and R27 must both be in
either open or closed, no
mismatch
Open
Internal crystal (24.000 MHz)
R27
Short
External crystal (0.03277 MHz)
Open
Internal crystal (24.000 MHz)
R29
Short
Power analyzer terminal bypassed
–
Open
Initiate power analyzing terminal (J12)
R39
Short
I
2
C expander disconnect/SFLASH enabled –
Open
I
2
C expander active/SFLASH disabled
FB3
Short
USB-to-UART (FTDI) active
–
Open
FTDI disconnect
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