Datasheet

12V
3.3V
soft-start from 12V
5V
soft-start from 3.3V P G
2.5V
P F8100 S EQ8 internally programmed
P F8100 SEQ8 internally programmed
1.8V
PF8100 SW2
VIN
LT8642SE V 3V3
LT8609SE V 3V3
PF8100 SW7
P F8100 S EQ8 internally programmed
1.35V
PF8100 SW3
5ms
P F8100 S EQ18 internally programmed
1.0V, LDO[1:4]
LTC7150S VDD
VDD (0.9/1V)
PF8100 SW1, LDO[1:4]
soft-start after LDO4 (PS _VDD_E N)
tss
PF8100 SW6 VTT
mode
DDR 4 (VTT)
P F8100 S EQ42 internally
programmed
PF8100 S W5
DDR4 (1.2V)
PG
From DC jack
P GOOD (to Rst_ctrl)
PF8100 P GOOD
P F8100 P GOOD_S EQ46 internally
programmed.
tvin_rise+tstest_done+ tfirst+S oft_start
2.5V,OVDD,
XVDD
P ower
Tier1
P F8100 S EQ42 internally
programmed
RST_OUT (to LS1046_R st_ctrl)
PF8100 RST_OUT
P F8100 P GOOD_S EQ52 internally
programmed.
3.87ms
31.4ms
2ms
12ms
2ms
1.5ms+1.4ms+0.1ms+4ms=7ms
5ms
Figure 6. Power supply sequence
The FRWY-LS1046A follows the power supply sequencing requirements mentioned in QorIQ LS1046A Data Sheet.
NOTE
2.1.4 VDD current/power measurement
The FRWY-LS1046A facilitates onboard measurement of current and power for its VDD power supply. Current/power
measurement facility is not available for other power supplies as they are considered as low-current/incidental supplies. The table
below provides details of VDD current/power measurement.
Power supplies
Layerscape FRWY-LS1046A Board Reference Manual, Rev. 0, 26 April 2019
NXP Semiconductors
17