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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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PC912XDP512F0MPVR 데이터시트(PDF) 1008 Page - Freescale Semiconductor, Inc |
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PC912XDP512F0MPVR 데이터시트(HTML) 1008 Page - Freescale Semiconductor, Inc |
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1008 / 1348 page  Chapter 24 DG128 Port Integration Module (S12XDG128PIMV2) MC9S12XDP512 Data Sheet, Rev. 2.21 1010 Freescale Semiconductor This register configures whether a pull-up or a pull-down device is activated, if the port is used as input or wired-OR output. This bit has no effect if the port is used as push-pull output. Out of reset no pull device is enabled. 24.0.5.31 Port M Polarity Select Register (PPSM) Read: Anytime. Write: Anytime. This register selects whether a pull-down or a pull-up device is connected to the pin. If CAN is active, a pull-up device can be activated on the related RXCAN inputs, but not a pull-down. 24.0.5.32 Port M Wired-OR Mode Register (WOMM) Read: Anytime. Write: Anytime. Table 24-31. PERM Field Descriptions Field Description 7–0 PERM[7:0] Pull Device Enable Port M 0 Pull-up or pull-down device is disabled. 1 Either a pull-up or pull-down device is enabled. 76543210 R PPSM7 PPSM6 PPSM5 PPSM4 PPSM3 PPSM2 PPSM1 PPSM0 W Reset 00000000 Figure 24-33. Port M Polarity Select Register (PPSM) Table 24-32. PPSM Field Descriptions Field Description 7–0 PPSM[7:0] Pull Select Port M 0 A pull-up device is connected to the associated port M pin, if enabled by the associated bit in register PERM and if the port is used as general purpose or RXCAN input. 1 A pull-down device is connected to the associated port M pin, if enabled by the associated bit in register PERM and if the port is used as a general purpose but not as RXCAN. 76543210 R WOMM7 WOMM6 WOMM5 WOMM4 WOMM3 WOMM2 WOMM1 WOMM0 W Reset 00000000 Figure 24-34. Port M Wired-OR Mode Register (WOMM) |
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