Texas Instruments CC35 E Series - Page 7

2.1.2 I
2
C Connections
The CC35xxE features two independent I
2
C peripherals, called I
2
C0 and I
2
C1. The LP-EM-CC35X1 allows you
to interface to these I
2
C buses via the LaunchPad header pins.
The LP-EM-CC35X1 also features an accelerometer and a temperature sensor for the out-of-box demo. These
features are connected to the I
2
C1 bus, and can be isolated using the jumpers provided (J15 and J28). By
removing J15 and J18, the accelerometer and the temperature sensors are isolated from the I
2
C1 bus.
Accelerometer
Temp sensor
Figure 2-5. I
2
C Connections
Table 2-3. I2C Jumper Definitions
Reference Use Comments
J15 I2C1 CLK Jumpers populated: onboard sensors connected
Jumpers not populated: onboard sensors disconnected
J18 I2C1 Data
Note
Both I
2
C buses have on-board pull-up resistors on the data and clk lines.
2.1.2.1 Default I
2
C Addresses
The default I
2
C addresses of the onboard sensors are listed in Table 2-4.
Table 2-4. Default I
2
C Addresses (of Onboard Sensors)
Sensor Type
Reference Designator on LP-EM-
CC35X1
Part Number (Manufacturer) Default Target Address (Hex)
Temperature U8 TMP1075NDRLR (TI) 0x48
Accelerometer U9 BMA456 (BOSCH) 0x18
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SWRU629 – SEPTEMBER 2024
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