NXP Semiconductors LS1028ARDB, Getting Started Manual, Page: 8 / 18

8 DIP switches
The LS1028ARDB provides dual inline package (DIP) switches to allow easy configuration of the system for the most popular
board options. The CPLD stores the DIP switch values in the BRDCFG and DUTCFG registers and that allows the software (either
local or remote) to reconfigure the system as required.
For each DIP switch:
• If the switch is up (on), the value is 1
• If the switch is down (off), the value is 0
Figure 4. on page 5 shows the switches available on the board.
The table below shows the available switches, and also indicates the default switch settings as shipped.
Table 6. Switch settings
Switch Supported function Description
SW2[1:4] RCW fetch location
CFG_RCW_SRC[3:0]
SW_RCW_SRC[3:0]
• 0000: Hard-coded RCW
• 1000: SDHC1: SD card
• 1001: SDHC2: eMMC
• 1010: UEFI/I2C Boot EEPROM
• 1101: XSPI serial NAND, 4K pages
• 1111: XSPI serial NOR, 24-bit address (default setting)
SW2[5]
Reset mode
RESET_REQ_B
SW_RST_MODE
• 0: Ignore RESET_REQ_B
• 1: Trigger system reset on RESET_REQ_B (default setting)
SW2[6:8] XSPI_A device mapping
CFG_XSPI_MAP
SW_XSPIMAP[2:0]: Controls how XSPI_A chip-selects are connected to
devices/peripherals.
Table 7.
Bit value XSPI_A_CS0 XSPI_A_CS1 Description
000 (default
setting) sNOR sNAND Normal NOR
001 sNAND sNOR Normal NAND
010 Emulator sNOR Programmable
NOR
011 Emulator sNAND Programmable
NAND
100 sNOR Emulator Boot from sNOR
and program
emulator
NXP Semiconductors
DIP switches
QorIQ LS1028A Reference Design Board Getting Started Guide, Rev. 0, 2/2019
User's Guide
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