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3.3 Switching Between I2C and SPI
To switch the EVM between I2C and SPI modes, the switches and jumpers must be configured as follows:
I2C
GPIO Switches:
S1: 10 kΩ pull-up
S2: MSP430
S3: 3.9 kΩ pull-down
S4: LED (lit = high)
I2C ADD:
S1: pull-up
S2:pull-down
Figure 3-3. I2C Mode Jumper Configuration
SPI
GPIO Switches:
S1: 10 kΩ pull-up
S2: MSP430
S3: 3.9 kΩ pull-down
S4: LED (lit = high)
I2C ADD:
S1: pull-up
S2:pull-down
Figure 3-4. SPI Mode Jumper Configuration
In SPI mode, GPIO2 must also be configured as
STATUS or INT
,
SPI Readback Data (SDO)
,
Active High
, and
CMOS
to support SPI readback.
Figure 3-5. GPIO2 Setting for SPI Mode
Communication protocols must be set in TICS Pro. From the menu bar, select
USB communications → Interface
to get the
Communication Setup
window and change the protocol.
Figure 3-6. Communication Setup Window (Changing from I2C to SPI)
EVM Configuration
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LMK5B33216EVM User's Guide
SNAU263A – FEBRUARY 2022 – REVISED JULY 2022
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