
Chapter 3
Board Configuration and Debug Support
This chapter contains the following sections:
•
•
3.1 Switch configuration
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
Table 28. 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 value)
The RCW source settings are mapped to 9-bit values when
an LS1043A processor is installed.
NOTE
SW2[5]
Reset mode
RESET_REQ_B
SW_RST_MODE
• 0: Ignore RESET_REQ_B
• 1: Trigger system reset on RESET_REQ_B (default value)
Switch configuration
QorIQ LS1028A Reference Design Board Reference Manual, Rev. b, 11/2018
NXP Semiconductors
COMPANY CONFIDENTIAL
51
Содержание QorIQ LS1028A
Страница 111: ......