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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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SC312XDP512F0MPVR датащи(PDF) 1012 Page - Freescale Semiconductor, Inc |
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SC312XDP512F0MPVR датащи(HTML) 1012 Page - Freescale Semiconductor, Inc |
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1012 / 1348 page  Chapter 24 DG128 Port Integration Module (S12XDG128PIMV2) MC9S12XDP512 Data Sheet, Rev. 2.21 1014 Freescale Semiconductor 24.0.5.38 Port P Pull Device Enable Register (PERP) Read: Anytime. Write: Anytime. This register configures whether a pull-up or a pull-down device is activated, if the port is used as input. This bit has no effect if the port is used as output. Out of reset no pull device is enabled. 24.0.5.39 Port P Polarity Select Register (PPSP) Read: Anytime. Write: Anytime. This register serves a dual purpose by selecting the polarity of the active interrupt edge as well as selecting a pull-up or pull-down device if enabled. Table 24-36. RDRP Field Descriptions Field Description 7–0 RDRP[7:0] Reduced Drive Port P 0 Full drive strength at output. 1 Associated pin drives at about 1/6 of the full drive strength. 76543210 R PERP7 PERP6 PERP5 PERP4 PERP3 PERP2 PERP1 PERP0 W Reset 00000000 Figure 24-40. Port P Pull Device Enable Register (PERP) Table 24-37. PERP Field Descriptions Field Description 7–0 PERP[7:0] Pull Device Enable Port P 0 Pull-up or pull-down device is disabled. 1 Either a pull-up or pull-down device is enabled. 76543210 R PPSP7 PPSP6 PPSP5 PPSP4 PPSP3 PPSP2 PPSP1 PPSP0 W Reset 00000000 Figure 24-41. Port P Polarity Select Register (PPSP) |
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