D12320VF25IV Datasheet, PDF (440/1304 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

Section 9 I/O Ports
Mode 6: In mode 6, port B pins function as address outputs or input ports. Input or output can be
specified on an individual bit basis. Setting a PBDDR bit to 1 makes the corresponding port B pin
an address output, while clearing the bit to 0 makes the pin an input port.
Port B pin functions in mode 6 are shown in figure 9.10.
When PBDDR = 1
When PBDDR = 0
Port B
A₁₅ (output)
A₁₄ (output)
A₁₃ (output)
A₁₂ (output)
A₁₁ (output)
A₁₀ (output)
A₉ (output)
A8 (output)
PB₇ (input)
PB₆ (input)
PB₅ (input)
PB₄ (input)
PB₃ (input)
PB₂ (input)
PB₁ (input)
PB₀ (input)
Figure 9.10 Port B Pin Functions (Mode 6)
Mode 7: In mode 7, port B pins function as I/O ports. Input or output can be specified for each pin
on an individual bit basis. Setting a PBDDR bit to 1 makes the corresponding port B pin an output
port, while clearing the bit to 0 makes the pin an input port.
Port B pin functions in mode 7 are shown in figure 9.11.
When PBDDR = 1
When PBDDR = 0
Port B
A₁₅ (output)
A₁₄ (output)
A₁₃ (output)
A₁₂ (output)
A₁₁ (output)
A₁₀ (output)
A₉ (output)
A8 (output)
PB₇ (input)
PB₆ (input)
PB₅ (input)
PB₄ (input)
PB₃ (input)
PB₂ (input)
PB₁ (input)
PB₀ (input)
Figure 9.11 Port B Pin Functions (Mode 7)
Rev.6.00 Sep. 27, 2007 Page 408 of 1268
REJ09B0220-0600