LS1043A
I2C1
DVDD
=
3.3 V
Mini PCIe
RTC
Addr=0x68
I2C1_SCL, I2C1_SDA
CLK gen.
Addr=0x69
6V49205BNLGI
Current
monitor
Addr=0x40
INA220AIDGST
PC34VR500V4
PMIC
Addr=0x08
Thermal
monitor
Addr=0x4C
ADT7461
EEPROM
Addr=0x52,
0x53
CAT24C05
PCIe
PT7C4338
DVDD
Figure 2-10. I2C scheme
The table below summarizes the I2C bus device addresses.
Table 2-8. I2C bus device map
I2C bus
I2C address
Device
Manufacturer
Description
I2C1
0x52, 0x53
CAT24C05
ON Semiconductor
Half of the device is used as an SPD
EEPROM for DDR. The other half is
used as a store system ID and MAC
address.
0x4C
ADT7461
ON Semiconductor
Thermal monitor
0x08
PC34VR500V4
Freescale
Semiconductor
Power management integrated circuit
(PMIC) for the onboard powers
0x69
6V49205BNLGI
IDT
Clock generator
0x40
INA220AIDGST
Texas Instruments
Current/power monitor
0x68
PT7C4338
Pericom
Semiconductor
Real-time clock (RTC)
I2C address is
defined by the
plugged-in PEX
card
Mini-PCIe slot
I2C address is
defined by the
plugged-in PEX
card
X1 PEX slot
I2C interface
QorIQ LS1043A Reference Design Board Reference Manual, Rev. 0, 08/2015
30
Freescale Semiconductor, Inc.