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3.13.2 SMBus
The board provides communication through SMBus. It is basically like I2C with an additional line for interrupt
and is used for connecting sensors and power peripherals.
3.13.3 Linux Bus Numbering
Linux identifies each I2C bus using a bus number. The table below shows the mapping between Q7 names,
Linux bus number and EVK header.
The other I2C buses (as reported by i2cdetect -l) are internal to the module and not routed to the Q7 connector.
3.14 GPIOs
Eight GPIOs are provided on the pin header labeled GPIO.
The location on the board is displayed below:
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Fig. 3.14: SMBUS header
Q7 name
Linux bus #
GP0_I2C
4
SMB / GP1_I2C
2
GP2_I2C / LVDS_DID
1
LVDS_BLC
7
EVK Header
SPI+I2C+1-Wire
SMBus
Display connector
Display connector
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