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
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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