HD6413008VF25 Datasheet, PDF (218/688 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

7. I/O Ports
7.8 Port B
7.8.1 Overview
Port B is an 8-bit input/output port that is also used for output (TP₁₅ to TP₈) from the
programmable timing pattern controller (TPC), input/output (TMIO₃, TMO₂, TMIO₁, TMO₀) by
the 8-bit timer, and CS₇ to CS₄ output. See table 7.16 for the selection of pin functions. A reset or
hardware standby transition leaves port B as an input/output port.
For output of CS₇ to CS₄ in modes 1 to 4, see section 6.3.4, Chip Select Signals. Pins not assigned
to any of these functions are available for generic input/output. Figure 7.7 shows the pin
configuration of port B.
Pins in port B can drive one TTL load and a 30-pF capacitive load. They can also drive darlington
transistor pair.
Port B pins
Port B
PB₇/TP₁₅
PB₆/TP₁₄
PB₅/TP₁₃
PB₄/TP₁₂
PB₃/TP₁₁ /TMIO₃/CS₄
PB₂/TP₁₀ /TMO₂/CS₅
PB₁/TP₉ /TMIO₁/CS₆
PB₀/TP₈ /TMO₀/CS₇
Pin functions in modes 1 to 4
PB₇ (input/output)/TP₁₅ (output)
PB₆ (input/output)/TP₁₄ (output)
PB₅ (input/output)/TP₁₃ (output)
PB₄ (input/output)/TP₁₂ (output)
PB₃ (input/output)/TP₁₁ (output) /TMIO₃ (input/output) /CS₄ (output)
PB₂ (input/output)/TP₁₀ (output) /TMO₂ (output) /CS₅ (output)
PB₁ (input/output)/TP₉ (output) /TMIO₁ (input/output) /CS₆ (output)
PB₀ (input/output)/TP₈ (output) /TMO₀ (output) /CS₇ (output)
Figure 7.7 Port B Pin Configuration
Rev.4.00 Aug. 20, 2007 Page 172 of 638
REJ09B0395-0400