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Table 17. DIP switch settings (continued)
Switch diagram
Switch
name
Supported function
Settings
SW4[7]
CMSIS-DAP enable
CMSISDAP_EN
• 0: CMSIS-DAP is enabled
• 1: CMSIS-DAP is disabled (default setting)
SW4[8]
RESET_REQ_B
handling
SW_RST_MODE
• 0: Ignore RESET_REQ_B assertion
• 1: Trigger system reset on RESET_REQ_B
assertion (default setting)
SW_RCW_SRC0
1
2
3
4
5
6
7
8
SW_RCW_SRC1
SW_RCW_SRC2
SW_RCW_SRC3
SW_RCW_SRC4
SW_RCW_SRC5
SW_RCW_SRC6
SW_RCW_SRC7
ON '1'
SW5[1:8]
+ SW4[1]
RCW source
selection
SW_RCW_SRC[0:8]
• 0010_0000_0: SDHC/eMMC
• 0010_0010_0: QSPI (default setting)
• 0100_1XXX_X: Hard-coded RCW
SW_RCW_SRC is spread
over SW4 and SW5.
NOTE
If you want to boot from
eMMC, program a bootable
image on the eMMC flash.
When you boot from eMMC,
you cannot insert an SD card.
If you want to boot from an SD
card, insert a bootable SD
card. When an SD card is
inserted, eMMC will be
disabled.
NOTE
1. CFG_TEST_SEL_B, SW_SVR1, and SW_SVR0 are used together to determine the silicon personality (SVR).
2.17 LEDs
The LS1046ARDB has light-emitting diodes (LEDs) to monitor system functions, such as power-on, reset, board faults, and so
on. The information collected from LEDs can be used for debugging purposes. The table below describes the LS1046ARDB
LEDs.
Table 18. LS1046ARDB LEDs
LED
Color
Positioned on
Name
Description
D3
Green
PCB
+3.3V
• OFF: 3.3 V power is OFF
• ON: 3.3 V power is supplied
D15
Green
Chassis
POWER
Table continues on the next page...
LEDs
QorIQ LS1046A Reference Design Board Reference Manual, Rev. 2, 30 May 2019
NXP Semiconductors
39