7 Jumpers
Jumpers (or shorting headers) are small connectors that allow to choose from two or more options available. Jumpers are usually
installed during board assembly and do not require any changes. In the FRWY-LS1046A, all jumpers are 2-pin connectors with
two settings: open and shorted.
Figure 4
highlights the FRWY-LS1046A jumpers available for use. The table below describes
the jumpers.
Table 5. FRWY-LS1046A jumpers
Part
identifier
Jumper type
Description
Jumper settings
J72
1x2 connector
UART selection header
• Open: UART1 port is accessed remotely
through a 1x4 header (J73)
• Shorted: USB 2.0 micro-B connector (J58)
is connected to UART1 port through a
USB-to-UART bridge (default setting)
J8
1x2 connector
VDD voltage selection header
• Open: VDD = 0.9 V
• Shorted: VDD = 1 V (default setting)
J14
1x2 connector
Reset mode selection header
• Open: RESET_REQ_B pin of the
processor is disconnected
• Shorted: RESET_REQ_B pin triggers
system reset when asserted (default
setting)
J11
1x2 connector
PROG_MTR voltage control
header (NXP use only)
• Open: PROG_MTR pin of the processor is
powered off (default setting)
• Shorted: PROG_MTR pin is powered by
OVDD (1.8 V)
J9
1x2 connector
TA_BB_VDD voltage control
header
• Open: TA_BB_VDD pin of the processor is
powered off
• Shorted: TA_BB_VDD pin is powered by
VDD (1/0.9 V) (default setting)
8 DIP switch
The FRWY-LS1046A has a 10-pin dual inline package (DIP) switch, SW1, which helps to perform some most common board
configuration tasks. For SW1:
• "ON" setting corresponds to 1
• "OFF" setting corresponds to 0
The DIP switch is highlighted in
Figure 4
. The table below describes SW1 settings.
Table 6. SW1 settings
Switch
Supported function
Settings
SW1[1:9]
RCW fetch location
• 0_0100_0100: QSPI NOR flash (default setting)
Table continues on the next page...
NXP Semiconductors
Jumpers
Layerscape FRWY-LS1046A Board Getting Started Guide, Rev. 1, 05/2020
User's Guide
8 / 14
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