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2.18 Processor configuration
The LS1046A processor uses hardware-sampled pins to configure many portions of it. The remaining portions of the processor
are configured from data in RCW.
The table below describes the LS1046A processor configuration pins.
Table 19. LS1046A processor configuration pins
Configuration
signal
Nets sampled
Switch preset
CPLD register
Description
cfg_rcw_src[0:8]
IFC_AD[8:15], IFC_CLE SW5[1:8], SW4[1]
Not applicable
Specifies RCW fetch location
cfg_dram_type
QSPI_B_SCK
Not applicable
Specifies DDR4. Affects GVDD
power supply.
cfg_soc_use
ASLEEP
Specifies XVDD voltage supply
(1.35 V)
cfg_gpinput[0:7]
IFC_AD[0:7]
User-defined
cfg_test_sel_B
SW3[2]
cfg_qspi_map[0:2]
SW3[3:5]
cfg_eng_use[0:2]
IFC_WE0_B,
IFC_OE_B, IFC_WP0_B
Not applicable
Sets to 1 on POR by CPLD or
resistors
This section does not cover non-processor configuration signals, which are handled using statically-driven signals
through registers.
NOTE
Processor configuration
QorIQ LS1046A Reference Design Board Reference Manual, Rev. 2, 30 May 2019
NXP Semiconductors
41