Port A; Overview - Renesas F-ZTAT H8 Series Hardware Manual

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 (TP
programmable timing pattern controller (TPC), input and output (TIOCB
TIOCA , TIOCB , TIOCA
1 0
unit (ITU), output (TEND
address output (A to A
23
in modes 3, 4, and 6, one pin is always used for A
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 A
Release Control Register (BRCR). For output of CS
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.
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REJ09B0259-0700
, TCLKD, TCLKC, TCLKB, TCLKA) by the 16-bit integrated timer
0
, TEND ) from the DMA controller (DMAC), CS
1 0
). A reset or hardware standby leaves port A as an input port, except that
20
to TP
7
output. For selecting the pin function, see
20
to A in modes 3, 4, and 6, see section 6.2.5, Bus
23 21
to CS
in modes 1 to 6, see section 6.3.2,
4 6
) from the
0
, TIOCA , TIOCB ,
2 2 1
to CS
output, and
4 6