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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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PC912XDP512F0MPVR 데이터시트(PDF) 943 Page - Freescale Semiconductor, Inc |
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PC912XDP512F0MPVR 데이터시트(HTML) 943 Page - Freescale Semiconductor, Inc |
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943 / 1348 page  23.0.5.42 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. 23.0.5.43 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 23-40. 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 23-44. Port P Pull Device Enable Register (PERP) Table 23-41. 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 23-45. Port P Polarity Select Register (PPSP) |
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