SPRUIT0A December 2019 – May 2020
-
Jacinto7 EVM Infotainment Expansion
- Trademarks
- 1 Introduction
- 2 Infotainment Expansion Board Overview
- 3 Infotainment Expansion Board - User Setup/Configuration
- 4
Infotainment Expansion Board Hardware Architecture
- 4.1 Infotainment Expansion Board Hardware Top Level Diagram
- 4.2 Expansion Connectors
- 4.3 Board ID EEPROM
- 4.4 Audio Codec Interface
- 4.5 FPD link De-Serializer Interface (Audio)
- 4.6 DIR Interface
- 4.7 DIT Interface
- 4.8 Legacy Audio/JAMR3 Connectors
- 4.9 VIN/VOUT Mux Selection
- 4.10 HDMI Interface Bridge
- 4.11 FPD Link Display Serializer Interface
- 4.12 Parallel Camera Interface
- A Jacinto7 EVM Interface/IO Mapping
- Revision History
4.3 Board ID EEPROM
The Infotainment Expansion board is identified by its version and serial number, which are stored in onboard EEPROM. The EEPROM CAT24C256WI-GT3 is accessible on the address 0x52 WKUP_I2C0 I2C BUS.
Figure 9. Board ID EEPROM Table 4. Board ID Memory Header Information
| Header | Field Name | Size (bytes) | Description | Value Written to EEPROM |
|---|---|---|---|---|
| MAGIC | 4 | Magic Number | 0xEE3355AA | |
| TYPE | 1 | Fixed length and variable position board ID header | 0x1 | |
| 2 | Size of payload | 0xF7 | ||
| BRD_
INFO |
TYPE | 1 | payload type | 0x10 |
| Length | 2 | offset to next header | 0x002E | |
| Board_Name | 16 | Name of the board | “J7X-INFO-EXP” | |
| Design_Rev | 2 | Revision number of the design | Variable | |
| PROC_Nbr | 4 | PROC number | “0086” | |
| Variant | 2 | Design variant number | Variable | |
| PCB_Rev | 2 | Revision number of the PCB | Variable | |
| SCHBOM_Rev | 2 | Revision number of the schematic | Variable | |
| SWR_Rev | 2 | first software release number | Variable | |
| VendorID | 2 | Vendor ID | Variable | |
| Build_Week | 2 | week of the year of production | Variable | |
| Build_Year | 2 | year of production | Variable | |
| BoardID | 6 | Reserved. Not populated with any value | NA | |
| Serial_Nbr | 4 | incrementing board number | Variable |
Above board ID details will be programmed on the EEPROM from the address 0x0h.