ST STEVAL-PCC009V2, User Manual

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UM0935 Getting started
Doc ID 17398 Rev 3 13/53
2.5 Selection of the interface
The tool has 10-pin and 30-pin interface headers. Both of these headers support various
communication peripherals, as shown in
Table 2 .
These headers and their corresponding pins can be used in various modes and GPIO
configurations.
As shown in Table 3 , the user can configure the IBU UI tool in 7 modes, 3 of these modes
are on a 10-pin header and 4 on a 30-pin header. For instance, if the user mainly aims at
using an I
2
C communication interface, there are two available choices:
a) I
2
C mode of a 10-pin header: along with the communication peripheral I
2
C, the
user has 6 GPIOs, of which 2 GPIOs can be used as PWM channels and 1 can be
used as an ADC channel
b) I
2
C mode of 30-pin header: along with the communication peripheral I
2
C, the user
has 22 GPIOs, of which 4 GPIOs can be used as PWM channels and 4 can be
used as ADC channels
Please refer to Appendix B , Table 5 to understand the possible GPIO modes and
communication interfaces available on each pin in 10-pin headers. Refer also to Appendix
C , Table 6 to understand the possible GPIO modes and communication interfaces available
on each pin in 30-pin headers.
Table 2. Availability of various communication peripherals and GPIOs on 10-pin
and 30-pin interfaces
Interfaces 30-pin interface 10-pin interface
I
2
C 1 1
SPI 1 1
UART(SCI) 2 1
PWM GPIOs 4 2
ADC channels 4 1
Table 3. Number of total GPIOs, PWM GPIOs, and ADC channels in 10-pin and 30-
pin headers in various modes
Header Interfaces modes Total GPIOs PWM GPIOs ADC channels
10-pin header
I
2
C mode 6 2 1
SPI mode 4 2 1
UART mode 4 2 1
30-pin header
I
2
C mode 22 4 4
SPI mode 20 4 4
UART1 mode 20 4 4
UART2 mode 22 4 4