HD64F7144F50V Datasheet, PDF (700/932 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

18. I/O Ports
18.6 Port F
Port F is an input-only port with the eight pins shown in figure 18.9.
Port F
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)
Figure 18.9 Port F
18.6.1 Register Descriptions
Port F is an 8-bit input-only port. Port F has the following register. For details on register
addresses and register states during each processing, refer to section 25, List of Registers.
• Port F data register (PFDR)
18.6.2 Port F Data Register (PFDR)
The port F data register (PFDR) is an 8-bit read-only register that stores port F data.
Bits PF7DR to PF0DR correspond to pins PF7 to PF0 (multiplexed functions omitted here).
Any value written into these bits is ignored, and there is no effect on the state of the pins. When
any of the bits are read, the pin state 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 18.6 summarizes port
F data register read/write operations.
Rev.4.00 Mar. 27, 2008 Page 654 of 882
REJ09B0108-0400