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MC912D60PMPV8 Datasheet(PDF) 55 Page - Freescale Semiconductor, Inc |
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MC912D60PMPV8 Datasheet(HTML) 55 Page - Freescale Semiconductor, Inc |
55 / 460 page Pinout and Signal Descriptions Port Signals MC68HC912D60A — Rev. 3.1 Technical Data Freescale Semiconductor Pinout and Signal Descriptions 55 3.6.4 Port G Port G pins are used for key wake-ups that can be used with the pins configured as inputs or outputs. The key wake-ups are triggered with a falling edge signal (KWPG). An interrupt is generated if the corresponding bit is enabled (KWIEG). If any of the interrupts is not enabled, the corresponding pin can be used as a general purpose I/O pin. Refer to I/O Ports with Key Wake-up. Register DDRG determines pin direction of port G when used for general-purpose I/O. When DDRG bits are set, the corresponding pin is configured for output. On reset the DDRG bits are cleared and the corresponding pin is configured for input. Port PGUPD determines what type of resistive load is used for port G input pins when PUPG bit is set in the PUCR register. When PGUPD pin is low, it loads a pull-down in all port G input pins. When PGUPD pin is high, it loads a pull-up in all port G input pins. In 80-pin version, the PGUPD is connected internally to VDD. The PG4 will have a pull-up. All port G pins should either be defined as outputs or have their pull-ups enabled. Setting the RDPG bit in register RDRIV causes all port G outputs to have reduced drive level. RDRIV can be written once after reset. RDRIV is not in the address map in peripheral mode. Refer to Bus Control and Input/Output. 3.6.5 Port H Port H pins are used for key wake-ups that can be used with the pins configured as inputs or outputs. The key wake-ups are triggered with a falling edge signal (KWPH). An interrupt is generated if the corresponding bit is enabled (KWIEH). If any of the interrupts is not enabled, the corresponding pin can be used as a general purpose I/O pin. Refer to I/O Ports with Key Wake-up. Register DDRH determines pin direction of Port H when used for general-purpose I/O. When DDRH bits are set, the corresponding pin is |
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