HD64F3048VTF8 Datasheet, PDF (325/903 Pages) Renesas Technology Corp – Hardware Manual Renesas 8-Bit Single-Chip

Section 9 I/O Ports
9.11 Port A
9.11.1 Overview
Port A is an 8-bit input/output port that is also used for output (TP₇ to TP₀) from the programmable
timing pattern controller (TPC), input and output (TIOCB₂, TIOCA₂, TIOCB₁, TIOCA₁, TIOCB₀,
TIOCA₀, TCLKD, TCLKC, TCLKB, TCLKA) by the 16-bit integrated timer unit (ITU), output
(TEND₁, TEND₀) from the DMA controller (DMAC), CS₄ to CS₆ output, and address output (A₂₃
to A₂₀). A reset or hardware standby leaves port A as an input port, except that in modes 3, 4, and
6, one pin is always used for A₂₀ output. For selecting the pin function, see table 9.19. Usage of
pins for TPC, ITU, and DMAC input and output is described in the sections on those modules. For
output of address bits A₂₃ to A₂₁ in modes 3, 4, and 6, see section 6.2.5, Bus Release Control
Register (BRCR). For output of CS₄ to CS₆ in modes 1 to 6, see section 6.3.2, Chip Select Signals.
Pins not assigned to any of these functions are available for generic input/output. Figure 9.10
shows the pin configuration of port A.
Pins in port A can drive one TTL load and a 30-pF capacitive load. They can also drive a
darlington transistor pair. Port A has Schmitt-trigger inputs.
Rev. 3.00 Sep 27, 2006 page 297 of 872
REJ09B0325-0300