Renesas ZTAT H8S/2357F, Hardware Manual

Page: 325 / 1047

Rev.6.00 Oct.28.2004 page 297 of 1016
REJ09B0138-0600H
9.7 Port 6
9.7.1 Overview
Port 6 is an 8-bit I/O port. Port 6 pins also function as interrupt input pins (
IRQ0
to
IRQ3
), DMAC I/O pins (
DREQ0
,
TEND0
,
DREQ1
, and
TEND1
), and bus control output pins (
CS4
to
CS7
). The functions of pins P6
5
to P6
2
are the same in
all operating modes, while the functions of pins P6
7
, P6
6
, P6
1
, and P6
0
change according to the operating mode. Pins P6
7
to
P6
4
are schmitt-triggered inputs. Figure 9-6 shows the port 6 pin configuration.
P6
7
/ IRQ3 / CS7
P6
6
/ IRQ2 / CS6
P6
5
/ IRQ1
P6
4
/ IRQ0
P6
3
/ TEND1
P6
2
/ DREQ1
P6
1
/ TEND0 / CS5
P6
0
/ DREQ0 / CS4
P6
7
(I/O)/IRQ3 (input)
P6
6
(I/O)/IRQ2 (input)
P6
5
(I/O)/IRQ1 (input)
P6
4
(I/O)/IRQ0 (input)
P6
3
(I/O)/TEND1 (output)
P6
2
(I/O)/DREQ1 (input)
P6
1
(I/O)/TEND0 (output)
P6
0
(I/O)/DREQ0 (input)
Port 6 pins Pin functions in mode 7 *
P6
7
(input)/IRQ3 (input)/CS7 (output)
P6
6
(input)/IRQ2 (input)/CS6 (output)
P6
5
(I/O)/IRQ1 (input)
P6
4
(I/O)/IRQ0 (input)
P6
3
(I/O)/TEND1 (output)
P6
2
(I/O)/DREQ1 (input)
P6
1
(input)/TEND0 (output)/CS5 (output)
P6
0
(input)/DREQ0 (input)/CS4 (output)
Note: * Modes 6 and 7 are provided in the on-chip ROM version only.
Pin functions in modes 4 to 6
*
Port 6
Figure 9-6 Port 6 Pin Functions
9.7.2 Register Configuration
Table 9-11 shows the port 6 register configuration.
Table 9-11 Port 6 Registers
Name Abbreviation R/W Initial Value Address
*
Port 6 data direction register P6DDR W H'00 H'FEB5
Port 6 data register P6DR R/W H'00 H'FF65
Port 6 register PORT6 R Undefined H'FF55
Note: * Lower 16 bits of the address.