UM0935
Tables and figures
Doc ID 17398 Rev 3
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Table 8.
GPIO modes of 30-pin interface
Mode
Sub-mode
Expected Result
Input mode (read)
Input pull-up
(default mode)
When you perform the GPIO “Read” operation, you get the GPIO value as
‘0’ or ‘1’. If no connection is made to this pin, it reads 1.
Input floating
When you perform the GPIO “Read” operation, you get the GPIO value as
‘0’ or ‘1’. If no connection is made to this pin, it reads 0 or 1 randomly.
Input with rising
interrupt
When you perform the GPIO “Read” operation, you get the GPIO value as
‘0’ or ‘1’. If no connection is made to this pin, it reads 0. As soon as the
value changes from 0 to 1(rising interrupt detected), the interrupt status
reads 01 from 00.
Input with falling
Interrupt
When you perform the GPIO “Read” operation, you get the GPIO value as
‘0’ or ‘1’. If no connection is made to this pin, it reads 1. As soon as the
value changes from 1 to 0(falling interrupt detected), the interrupt status
reads 01 from 00.
Output mode
(write)
Output push-pull
When the “Write” operation is performed with values 0 or 1, the voltage level
on the corresponding GPIO pin can be observed corresponding to the value
written.
Output open-
drain
When the “Write” operation is performed with value 0, the voltage level on
the corresponding GPIO pin is 0. When the “Write” operation is performed
with value 1, the voltage level on the corresponding GPIO pin can be 0 or 1
randomly.
Table 9.
PWM channel settings
PWM channel
)
Frequency
Duty cycle
PWM channel 1
7
F1
D1
PWM channel 2
8
F1
D2
PWM channel 3
19
F2
D3
PWM channel 4
21
F2
D4
Summary of Contents for STEVAL-PCC009V2
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Page 42: ...UM0935 Schematics and BOM list Doc ID 17398 Rev 3 42 53 Figure 32 10 pin com interface V...
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