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701 / 923 page  663 19.7 Port F Port F is an 8-pin input port. All modes are configured in the following way: • PF7 (input)/AN7 (input) • PF6 (input)/AN6 (input) • PF5 (input)/AN5 (input) • PF4 (input)/AN4 (input) • PF3 (input)/AN3 (input) • PF2 (input)/AN2 (input) • PF1 (input)/AN1 (input) • PF0 (input)/AN0 (input) 19.7.1 Register Configuration Table 19.18 summarizes the port F register. Table 19.18 Port F Register Name Abbreviation R/W Initial Value Address Access Size Port F data register PFDR R External pin dependent H'FFFF83B3 8 19.7.2 Port F Data Register (PFDR) PFDR is an 8-bit read-only register that stores data for port F. The bits PF7DR–PF0DR correspond to the PF7/AN7–PF0/AN0 pins. There are no bits 15–8, so always access as eight bits. Any value written into these bits is ignored, and there is no effect on the status of the pins. When any of the bits are read, the pin status rather than the bit value is read directly. However, when an A/D converter analog input is being sampled, values of 1 are read out. Table 19.19 shows the read/write operations of the port F data register. PFDR is not initialized by power-on resets, manual resets, standby mode, or sleep mode (the bits always reflect the pin status). Bit: 7 6 5 4 3 2 1 0 PF7DR PF6DR PF5DR PF4DR PF3DR PF2DR PF1DR PF0DR Initial value: ** ** *** * R/W: R R R R R R R R Note: * Initial values are dependent on the status of the pins at the time of the reads. |
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