
2.2.4 Current and power measurement
The LS1028ARDB implements onboard current and power measurements only for the VDD supply. The table below lists all
measurable supplies.
Table 5. Power monitoring
Power
Measurement device
Shunt resistor value
Notes
VDD
INA220
0.001
The VDD supply powers the
LS1028A core (0.9 V / 1 V), USB
(USB_SDVDD, USB_SVDD),
DisplayPort (DP_SVDD) and
SerDes (SVDD) power supplies.
Power supplies not listed in the above table are considered as low-current/incidental supplies and are not instrumented for power
measurement.
2.3 Clocks
The LS1028ARDB provides all the clocks required for the processor and peripheral interfaces. The figure below shows the
LS1028ARDB clock architecture.
LS1028A
TS EC_1588_CLK _IN
(E C1_R X_CLK)
DP_REF CLK_P/N
DIFF _S YS CLK_(P/N)
27 MHz LVDS
PE x Conn.
100 MHz
LP-HCS L
3
S LOTn_RE FCL K_[P,N]
S D1_RE F_CLK[1:2]
Differential
S ingle-ended
1588 Header
125.00 MHz
1.8V LVCMOS
3
S LOT[1:2]_CLK_R EQ
S LOT[1:2]_P RE S ENT_B
OE_B
100 MHz LP-HCS L
2
VDDO_2
VDDO_4
VDDO_0
VDDO_1
VDDA/VDD/VDD_CORE
3V3
OTP and
Control
Logic
I2C1_CH1
0x6A
1V8
VDDO
25 MHz
XOUT
XIN
PLL
~
FOD1
FOD2
FOD3
FOD4
OE
OE_Buffer
OE(3,5)_B
OE(6,7)_B
No S pread Support
in Design
OUT1
OUT2
OUT3,5
OUT(6,7)
OUT4
5P49V5907B520NDGI
OUT0_SEL_I2CB
25 MHz
1.8V LVCMOS
HOT_CLK
to CPLD
10K
100 MHz HCS L
CLK GE N_OE67_B
To CP LD
*Device doesn t support switching power
rails off, even if outputs are unused.
TS E C_1588_CLK_IN
F104
(QS GMII P HY)
125MHz
XO
125 MHz LVDS
3V3
1V8
X
From CPLD
27MHz
XO
Figure 7. LS1028ARDB clock architecture
Clocks
QorIQ LS1028A Reference Design Board Reference Manual, Rev. b, 11/2018
NXP Semiconductors
COMPANY CONFIDENTIAL
21
Содержание QorIQ LS1028A
Страница 111: ......