HD6413008VF25 Datasheet, PDF (198/688 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

7. I/O Ports
Port 7 Data Register (P7DR)
Bit
7
6
5
4
3
2
1
0
P7₇
P7₆
P7₅
P7₄
P7₃
P7₂
P7₁
P7₀
Initial value
⎯*
⎯*
⎯*
⎯*
⎯*
⎯*
⎯*
⎯*
Read/Write
R
R
R
R
R
R
R
R
Note: * Determined by pins P7₇ to P7₀ .
When port 7 is read, the pin logic levels are always read. P7DR cannot be modified.
7.5 Port 8
7.5.1 Overview
Port
8
is
a
5-bit
input/output
port
that
is
also
used
for
CS
3
to
CS
0
output,
IRQ
3
to
IRQ
0
input,
and
A/D converter ADTRG input. Figure 7.4 shows the pin configuration of port 8.
In
the
H8/3008,
port
8
can
provide
CS
3
to
CS
0
output,
IRQ
3
to
IRQ
0
input,
and
ADTRG
input.
See
table 7.8 for the selection of pin functions in expanded modes.
See section 14, A/D Converter, for a description of the A/D converter's ADTRG input pin.
The
IRQ
3
to
IRQ
0
functions
are
selected
by
IER
settings,
regardless
of
whether
the
pin
is
used
for
input or output. Caution is therefore required. For details see section 5.3.1, External Interrupts.
Pins in port 8 can drive one TTL load and a 90-pF capacitive load. They can also drive a
darlington transistor pair.
Pins P8₂ to P8₀ have Schmitt-trigger inputs.
Rev.4.00 Aug. 20, 2007 Page 152 of 638
REJ09B0395-0400