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PSD4235G2-12UT Datasheet(PDF) 82 Page - STMicroelectronics |
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PSD4235G2-12UT Datasheet(HTML) 82 Page - STMicroelectronics |
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82 / 124 page  I/O ports PSD4235G2V 82/124 (The slew rate is a measurement of the rise and fall times of an output. A higher slew rate means a faster output response and may create more electrical noise. A pin operates in a high slew rate when the corresponding bit in the Drive register is set to '1.' The default rate is slow slew.) Table 45 shows the Drive register for Ports A, B, C, D, E, F and G. It summarizes which pins can be configured as Open Drain outputs and which pins the slew rate can be set for. Table 42. Port Pin Direction Control, output Enable P.T. not defined Direction register bit Port pin mode 0 Input 1 Output Table 43. Port Pin Direction Control, output Enable P.T. defined Direction register bit Output Enable P.T. Port pin mode 0 0 Input 0 1 Output 1 0 Output 1 1 Output Table 44. Port direction assignment example Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 0 0 0 0 0 1 1 1 Table 45. Drive register pin assignment(1) 1. NA = Not Applicable. Drive register Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Port A Open Drain Open Drain Open Drain Open Drain Open Drain Open Drain Open Drain Open Drain Port B Open Drain Open Drain Open Drain Open Drain Open Drain Open Drain Open Drain Open Drain Port C Slew Rate Slew Rate Slew Rate Slew Rate Slew Rate Slew Rate Slew Rate Slew Rate Port D NANANA NA Open Drain Open Drain Open Drain Open Drain Port E Open Drain Open Drain Open Drain Open Drain Open Drain Open Drain Open Drain Open Drain Port F Slew Rate Slew Rate Slew Rate Slew Rate Slew Rate Slew Rate Slew Rate Slew Rate Port G Open Drain Open Drain Open Drain Open Drain Open Drain Open Drain Open Drain Open Drain |
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