System Core, Boot Configuration and On-Board Memory 5
miriac SBC-LS1028A User Manual
V 1.0
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© MicroSys Electronics GmbH 2019
5.7
I²C Bus
The SBC-LS1028A offers one I²C bus: I2C-1. As the bus is already used on the
module some I²C addresses are not available. The carrier adds an I²C multiplexer:
The following table shows the I²C addresses depicted as 7-bit addresses. The R/W
bit is not displayed.
I2C-1 bus map (7-bit address):
Address
Designator
Device
On
Carrier
On
Module
Function
0x43
J12
FXL6408
✓
GPIO Expander
0x00
J30
TMP451AIDQF
✓
General Call reset
address
0x4C
Temperature sensor
0x51
J7
PCF85063ATT
✓
RTC
0x54
J10
BR24G128NUX-3
✓
EEPROM
0x70
J24
TCA9544APWR
✓
I²C Multiplexer
Table 5-5 I²C-1 bus map
Figure 5-3 Multiplexer I2C-1 bus
Figure 5-4 I2C-1 bus topology