I²C Structure 8
miriac SBC-S32V User Manual
V 1.1
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© MicroSys Electronics GmbH 2017
8
I²C Structure
The SBC-S32V operates on three different I²C busses.
I²C Bus 0 is only connected to the MIPI-CSI port A, while I²C Bus 1 covers the
MIPI-CSI port B.
I²C Bus 2 controls all other devices on the module and carrier as well as the
miniPCIe slot and the HDMI connected devices.
Due to the unpredictable access address of HDMI and miniPCIe slot devices, care
must be taken to avoid double addressing with the other I²C devices on this bus.
8.1.1 Bus Map
I²C Bus 0:
Address
Reference
Device
Function
0x00-0x7F
---
MIPIA
External devices
Table 6 I²C0 bus map
I²C Bus 1:
Address
Reference
Device
Function
0x00-0x7F
---
MIPIB
External devices
Table 7 I²C1 bus map
I²C Bus 2:
Address
Reference
Device
Function
0x51
J25 [module]
PCF85263A
Real Time Clock
0x3F
J6 [carrier]
TFP410P
HDMI Transmitter
0x00-0x7F
HDMI-A [carrier]
HDMI Connector
DDC
0x00-0x7F
PCIE-A [carrier]
miniPCIe Slot
External devices
Table 8 I²C2 bus map
