Why chips can not enter interrupt?
First, check the corresponding interrupt source control bit whether set to ...
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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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When use Reset / Px.x pin as input port, why can not read high?
1.Users need to check whether the Reset option is selected Px.x in code opt...
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What should be noted when switch IO port from output mode to input mode?
1.Steps for input mode switching to output mode: (1) Initial I/O status,...
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How much is Sonix MCU I/O port drive current?
I/O port drive current can be divided into source current and sink current,...
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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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Using Reset pin as input port (via ground key), why can not read low level?
1.Check Reset_Pin in Code Option if it is chosen right;2.For OTP MCU, this ...
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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 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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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...