Port 8; Overview - Renesas F-ZTAT H8 Series Hardware Manual

Section 9 I/O Ports
9.9

Port 8

9.9.1

Overview

Port 8 is a 5-bit input/output port that is also used for CS
to IRQ
input. Figure 9.8 shows the pin configuration of port 8.
0
In modes 1 to 6 (expanded modes), port 8 can provide CS
to IRQ
input. See table 9.14 for the selection of pin functions in expanded modes.
0
In mode 7 (single-chip mode), port 8 can provide IRQ
selection of pin functions in single-chip mode.
The IRQ to IRQ
functions are selected by IER settings, regardless of whether the pin is used for
3 0
input or output. For details see section 5, Interrupt Controller.
Pins in port 8 can drive one TTL load and a 90-pF capacitive load. They can also drive a
darlington transistor pair.
Pins P8 to P8 have Schmitt-trigger inputs.
2 0
Port 8
Rev. 7.00 Sep 21, 2005 page 284 of 878
REJ09B0259-0700
Port 8 pins Pin functions in modes 1 to 6
(expanded modes)
CS
P8 / P8 (input)/
4 0 4
CS IRQ
P8 / / P8 (input)/
3 1 3 3
CS IRQ
P8 / / P8 (input)/
2 2 2 2
CS IRQ
P8 / / P8 (input)/
1 3 1 1
RFSH IRQ
P8 / / P8 (input/output)/
0 0 0
Pin functions in mode 7
(single-chip mode)
P8 /(input/output)
4
IRQ
P8 /(input/output)/ (input)
3 3
IRQ
P8 /(input/output)/ (input)
2 2
IRQ
P8 /(input/output)/ (input)
1 1
IRQ
P8 /(input/output)/ (input)
0 0
Figure 9.8 Port 8 Pin Configuration
to CS output, RFSH output, and IRQ
3 0
to CS output, RFSH output, and IRQ
3 0
to IRQ
input. See table 9.15 for the
3 0
CS
(output)
0
CS IRQ
(output)/ (input)
1 3
CS IRQ
(output)/ (input)
2 2
CS IRQ
(output)/ (input)
3 1
RFSH
(output)/
3
3
IRQ
(input)
0