D12320VF25IV Datasheet, PDF (436/1304 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

Section 9 I/O Ports
9.9 Port B
9.9.1 Overview
Port B is an 8-bit I/O port. Port B has an address bus output function, and the pin functions change
according to the operating mode.
Port B has a built-in MOS input pull-up function that can be controlled by software.
Figure 9.8 shows the port B pin configuration.
Port B
Port B pins
PB₇ / A₁₅
PB₆ / A₁₄
PB₅ / A₁₃
PB₄ / A₁₂
PB₃ / A₁₁
PB₂ / A₁₀
PB₁ / A₉
PB₀ / A₈
Pin functions in modes 4 and 5
A₁₅ (output)
A₁₄ (output)
A₁₃ (output)
A₁₂ (output)
A₁₁ (output)
A₁₀ (output)
A₉ (output)
A₈ (output)
Pin functions in mode 6
PB₇ (input) / A₁₅ (output)
PB₆ (input) / A₁₄ (output)
PB₅ (input) / A₁₃ (output)
PB₄ (input) / A₁₂ (output)
PB₃ (input) / A₁₁ (output)
PB₂ (input) / A₁₀ (output)
PB₁ (input) / A₉ (output)
PB₀ (input) / A₈ (output)
Pin functions in mode 7
PB₇ (I/O)
PB₆ (I/O)
PB₅ (I/O)
PB₄ (I/O)
PB₃ (I/O)
PB₂ (I/O)
PB₁ (I/O)
PB₀ (I/O)
Figure 9.8 Port B Pin Functions
Rev.6.00 Sep. 27, 2007 Page 404 of 1268
REJ09B0220-0600