Supported boot options
LS1028ARDB supports the following boot options:
• FlexSPI NOR flash (referred to as "FSPI" or "FSPI flash" in the following sections). CS refers to Chip Select.
• eMMC
• SD card (SDHC1)
On-board switch options
The RDBs have user selectable switches for evaluating different boot options for the LS1028A device as given in the table below
('0' is OFF, '1' is ON).
Boot source
SW2[1:8]
SW3[1:8]
SW5[1:8]
FSPI NOR (default)
1111_1000
1111_0000
0011_1001
SD Card (SDHC1)
1000_1000
1111_0000
0011_1001
eMMC
1001_1000
1111_0000
0011_1001
In addition to the above switch settings, make sure the following jumper settings are correct.
Table 7. LS1028ARDB jumper settings
Jumper
Type
Name/function
Description
J6
1x2-pin connector
TA_BB_EN enable
Open: TA_BB_TMP_DETECT_B pin is High
(default value)
Shorted: TA_BB_TMP_DETECT_B pin is Low
J7
1x2-pin connector
VBAT_EN
Open: Disable battery backup for TA_BB_VDD
(default value)
Shorted: Enable battery backup for TA_BB_VDD
J27
1x2-pin connector
PROG_MTR voltage control (for
NXP use only)
Open: PROG_MTR pin is powered off (default
value)
Shorted: PROG_MTR pin is powered by OVDD
(1.8 V)
J28
1x2-pin connector
TA_PROG_SFP voltage control
(for NXP use only)
Open: TA_PROG_SFP pin is powered off
(default value)
Shorted: TA_PROG_SFP pin is powered by
OVDD (1.8 V)
FlexSPI NOR Flash Chip-select
FlexSPI NOR flash is a simple and convenient destination for deploying images so it is frequently used.
The benefit of this feature is that it allows more than one set of images to be independently deployed to the one NOR flash. This
is very helpful during development because you can use the U-Boot image in one chip-select to program an image set into a
different chip-select. If the new images are flawed, the old images are still functional to let you deploy corrected images.
LS1028A BSP Quick Start
Layerscape LS1028A BSP User Guide, Rev. 0.3, 04/2019
NXP Semiconductors
17
Summary of Contents for Layerscape LS1028A BSP
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