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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) 947 Page - Freescale Semiconductor, Inc |
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SC312XDP512F0MPVR датащи(HTML) 947 Page - Freescale Semiconductor, Inc |
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947 / 1348 page  23.0.5.49 Port H Reduced Drive Register (RDRH) Read: Anytime. Write: Anytime. This register configures the drive strength of each Port H output pin as either full or reduced. If the port is used as input this bit is ignored. 23.0.5.50 Port H Pull Device Enable Register (PERH) 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. Table 23-45. DDRH Field Descriptions Field Description 7–0 DDRH[7:0] Data Direction Port H 0 Associated pin is configured as input. 1 Associated pin is configured as output. Note: Due to internal synchronization circuits, it can take up to 2 bus clock cycles until the correct value is read on PTH or PTIH registers, when changing the DDRH register. 76543210 R RDRH7 RDRH6 RDRH5 RDRH4 RDRH3 RDRH2 RDRH1 RDRH0 W Reset 00000000 Figure 23-51. Port H Reduced Drive Register (RDRH) Table 23-46. RDRH Field Descriptions Field Description 7–0 RDRH[7:0] Reduced Drive Port H 0 Full drive strength at output. 1 Associated pin drives at about 1/6 of the full drive strength. 76543210 R PERH7 PERH6 PERH5 PERH4 PERH3 PERH2 PERH1 PERH0 W Reset 00000000 Figure 23-52. Port H Pull Device Enable Register (PERH) |
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