1V21V2
EMI1_MDIO
EMI1_MDC
EMI2_MDIO
EMI2_MDC
OVDD=1V8
Inphi
IN112525
PHY=0x00
LX2160A
1V8
1V8
1V21V2
1V21V21V21V2
Inphi
CS4223
PHY=0x00
NTSX2102GD
Voltage
Level
Translator
2V5
1V8
NTSX2102GD
Voltage
Level
Translator
2V5
1V8
2V5
1V21V2
Aquantia
AQR107 #2
PHY=0x05
1V21V2
Aquantia
AQR107 #1
PHY=0x04
Qualcomm
AR8035 #2
PHY=0x02
Qualcomm
AR8035 #1
PHY=0x01
Figure 15. EMI routing architecture
Both EMI1 and EMI2 operate at OVDD (1.8 V) levels. For devices not operating at 1.8 V, EMI signals are bi-directionally shifted
to the compatible voltage using voltage level translators.
In the LX2160ARDB, no multiplexer routing is needed for EMI connections.
NOTE
The table below summarizes the EMI connections.
Table 12. EMI connections
EMI bus MDIO address Device connected
EMI1 0x00 Inphi CS4223 40 GbE PHY
0x01 Qualcomm AR8035 1 GbE PHY #1
0x02 Qualcomm AR8035 1 GbE PHY #2
0x04 Aquantia AQR107 10 GbE PHY #1
0x05 Aquantia AQR107 10 GbE PHY #2
EMI2 0x00 Inphi IN112525 25 GbE PHY
2.7 eSDHC interface
The LX2160A processor supports two enhanced secured digital host controllers (eSDHC): eSDHC1 and eSDHC2.
The LX2160ARDB eSDHC1 interface provides a secure digital (SD) connector (J42) for connecting an SD card to the board.
Although the LX2160A processor does not support EVDD at 3.3 V, the LX2160ARDB supports dynamic EVDD (selectable 1.8
V / 3.3 V). The SDHC1_VSEL signal automatically changes the input/output voltage to follow the SD card.
I2C2 must be programmed in the RCW to serve as the card detect (CD_B) and write protect (WP) pins for eSDHC1 interface.
This happens automatically when the SD card slot is selected as the boot device.
The figure below shows the eSDHC1 connections in the LX2160ARDB.
NXP Semiconductors
LX2160ARDB Functional Description
QorIQ LX2160A Reference Design Board Reference Manual, Rev. 4, 07/2020
Reference Manual 28 / 116
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