Connect pull-down resistors to I/O port, why can not read low level when there is no external signal?
SONIX MCU general I/O port built-in pull-up resistors, the equivalent resis...
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How to connect single key and MCU to prevent I/O port damage effectively?
In product development, the key is the most common functions, taking such c...
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How to select in Code Option when using 1M crystal?
When the selected external oscillator frequency is less than 1MHz, the choi...
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When MCU I/O port is OPEN DRAIN output, is it allowed to supply higher voltage for its external pull-up resistor than IC supply voltage?
Sonix IC's open drain are pseudo open drain, external pull-up resistor volt...
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Why chips can not enter interrupt?
First, check the corresponding interrupt source control bit whether set to ...
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P00 settings completely correct, why can not enter interrupt?
First, make sure P00 interrupt settings are correct, such as P00IEN is set ...
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Why program can run into external INT0 interrupt program while FP00IEN has already been cleared?
SONIX 8-bit MCU interrupt is that once received P0.0 interrupt condition, i...
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How much is SONIX MCU's I/O pull-up resistor?
This point has been described in chip's specifications (Electrical Characte...
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How to set I/O port to save power?
Correct I/O port settings can avoid I/O extra current leakage: 1.For idle ...
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How to connect single key and MCU to prevent I/O port damage effectively?
In product development, the key is the most common functions, taking such c...