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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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PC912XDP512F0MPVR 데이터시트(PDF) 948 Page - Freescale Semiconductor, Inc |
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PC912XDP512F0MPVR 데이터시트(HTML) 948 Page - Freescale Semiconductor, Inc |
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948 / 1348 page  Chapter 23 DQ256 Port Integration Module (S12XDQ256PIMV2) MC9S12XDP512 Data Sheet, Rev. 2.21 950 Freescale Semiconductor 23.0.5.51 Port H Polarity Select Register (PPSH) 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. 23.0.5.52 Port H Interrupt Enable Register (PIEH) Read: Anytime. Write: Anytime. This register disables or enables on a per-pin basis the edge sensitive external interrupt associated with Port H. Table 23-47. PERH Field Descriptions Field Description 7–0 PERH[7:0] Pull Device Enable Port H 0 Pull-up or pull-down device is disabled. 1 Either a pull-up or pull-down device is enabled. 76543210 R PPSH7 PPSH6 PPSH5 PPSH4 PPSH3 PPSH2 PPSH1 PPSH0 W Reset 00000000 Figure 23-53. Port H Polarity Select Register (PPSH) Table 23-48. PPSH Field Descriptions Field Description 7–0 PPSH[7:0] Polarity Select Port H 0 Falling edge on the associated port H pin sets the associated flag bit in the PIFH register. A pull-up device is connected to the associated port H pin, if enabled by the associated bit in register PERH and if the port is used as input. 1 Rising edge on the associated port H pin sets the associated flag bit in the PIFH register. A pull-down device is connected to the associated port H pin, if enabled by the associated bit in register PERH and if the port is used as input. 76543210 R PIEH7 PIEH6 PIEH5 PIEH4 PIEH3 PIEH2 PIEH1 PIEH0 W Reset 00000000 Figure 23-54. Port H Interrupt Enable Register (PIEH) |
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