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Qorvo 1800MHz Small Cell RF Card Hardware User’s Guide
Hardware User’s Guide
5.8
EEPROM and I2C Interface
U66 on the Qorvo card is 1Kbit EEPROM from Microchip. It uses a 2-wire I2C interface. The
purpose of this device is to store a board ID so that software can distinguish this board from other
daughter card. It would also be possible to store a device ID and/or calibration parameters that are
unique to a specific board
’s serial number.
Currently this functionality has not been implemented yet.
Avnet has Intelligent Platform Management Interface (IPMI) EEPROMs for identification on some
boards. Inside the Avnet reference design (see 5.5), the RFTOOL codebase includes modules for
I2C communication.
I2C can be accessed from the ZCU111 through the LPAM/LPAF connectors. During production
the EEPROM can also be programmed from the I2C test header, J5.
Table 2
– I2C Header J5 Pin Assignments
Pin #
Signal
Description
1
VBUS_1V8
1.8V
2
I2C_ SDAX
I2C data
3
I2C_ SCLX
I2C clock
4
DGND
Digital Ground
Figure 14
– The I2C Test Header
