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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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ST6391 датащи(PDF) 31 Page - STMicroelectronics |
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ST6391 датащи(HTML) 31 Page - STMicroelectronics |
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31 / 68 page  Figure 30. I/O Configuration Diagram (Open Drain 12V) Figure 31. I/O Configuration Diagram (Open Drain 5V, Push-pull) Input/Output Configurations The following schematics show the I/O lines hard- ware configuration for the different options. Figure 30 shows the I/O configuration for an I/O pin with open-drain 12V capability (standard drive and high drive). Figure 31 shows the I/O configuration for an I/O pin with push-pull and with open drain 5V capa- bility. Notes : The WAIT instruction allows the ST639x to be used in situations where low power consumption is needed. This can only be achieved however if the I/O pins either are programmed as inputs with well defined logic levels or have no power consuming resistive loads in output mode. As the same die is used for the different ST639x versions the unavail- able I/O lines of ST639x should be programmed in output mode. Single-bit operations on I/O registers are possible but care is necessary because reading in input mode is made from I/O pins while writing will di- rectly affect the Port data register causing an unde- sired changes of the input configuration. INPUT/OUTPUT PORTS (Continued) ® ST6391,92,93,95,97,99 27/64 |
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