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LS1046A
I2C1
D
VDD = 3.3 V
Mini-PCIe
RTC
I2C1_SCL, I2C1_SDA
Clock
generator
6V49205BNLGI
Current
monitor
INA220AIDGST
VR500V8
VR500V8
PMIC
Addr: 0x08
Thermal
monitor
ADT7461
EEPROM
CAT24C05
Retimer
PCF2129AT
DVDD
I2C4
I2C4_SCL, I2C4_SDA
DVDD
SPD
Level
shifter
SFP
cage
DS110DF111
PCIe x1
PCIe x1
Addr: 0x51
Addr: 0x18
Addr: 0x52,
0x53
Addr: 0x69
Addr: 0x40
Addr: 0x4C
Addr: 0x51
PCA9306DCUR
Figure 16. I2C scheme
The table below summarizes the I2C bus device addresses.
Table 15. I2C bus device map
I2C bus
I2C address
Device
Manufacturer
Description
I2C1
0x52, 0x53
CAT24C05
ON Semiconductor
Half of the device is used as generic
EEPROM. The other half is used to
store system ID and MAC address.
0x4C
ADT7461
ON Semiconductor
Thermal monitor
0x51
SPD
Micron
DDR module SPD
0x69
6V49205BNLGI
IDT
Clock generator
0x08
VR500V8
NXP Semiconductors
0x40
INA220AIDGST
Texas Instruments
Current/power monitor
0x18
DS110DF111
Texas Instruments
XFI1 retimer
I2C address is
defined by the
plugged-in PCIe
card
Mini-PCIe x1 slot
Table continues on the next page...
LS1046ARDB Functional Description
QorIQ LS1046A Reference Design Board Reference Manual, Rev. 2, 30 May 2019
34
NXP Semiconductors