Hardware Documentation armStone
™A9
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4.11.4 I2C/ SPI
The module supports two I2C interfaces at feature connector. Only one is compatible with
armStone standard. Signals are 3.3V compliant and do have 4.7k pull-ups on module
There is also a HS SPI interface as alternative function available on these pins.
armStoneA9 Feature Connector I2C Interfaces
J1 Pin PullUp
I2C
Standard
Optional
12
4,7k
-
GPIO
GPIO, SPI_CLK
14
4,7k
-
GPIO
GPIO, SPI_CS
16
2)
4,7k
Soft I2C_SCL
I2C_SCL
GPIO, SPI_MOSI
17
2)
4,7k
Soft I2C_SDA
I2C_SDA
GPIO, SPI_MISO
18
2)
3)
I2C1_SCL
GPIO
GPIO, ROW0
26
2)
3)
I2C1_SDA
GPIO
GPIO
Table 8: I2C/ SPI Interfaces
2)
These IO-Pins can be reconfigured as GPIO.
3)
Alternate pin configuration function in software. Please refer the software manual or ask
our technical support. There is no compatibility to other armStone using this alternative
function.
