![Hitachi H8/3008 Скачать руководство пользователя страница 161](http://html.mh-extra.com/html/hitachi/h8-3008/h8-3008_hardware-manual_140473161.webp)
145
7.3
Port 6
7.3.1
Overview
Port 6 is an 8-bit input/output port that is also used for input and output of bus control signals
(
LWR
,
HWR
,
RD
,
AS
,
BACK
,
BREQ
,
WAIT
) and for clock (
φ
) output.
The port 6 pin configuration is shown in figure 7.2.
See table 7.4 for the selection of the pin functions.
Pins in port 6 can drive one TTL load and a 90-pF capacitive load. They can also drive a
darlington transistor pair.
Port 6
P6 /
P6 /
P6 /
P6 /
P6 /
P6 /
P6 /
P6 /
7
6
5
4
3
2
1
0
φ
LWR
HWR
RD
AS
BACK
BREQ
WAIT
Port 6 pins
Modes 1 to 4
(expanded modes)
P6
7
(input)/
φ
(output)
LWR
(output)
HWR
(output)
RD
(output)
AS
(output)
P6
2
(input/output)/
BACK
(output)
P6
1
(input/output)/
BREQ
(input)
P6
0
(input/output)/
WAIT
(input)
Figure 7.2 Port 6 Pin Configuration
7.3.2 Register Descriptions
Table 7.4 summarizes the registers of port 6.
Table 7.4
Port 6 Registers
Address*
Name
Abbreviation
R/W
Initial Value
H'EE005
Port 6 data direction register
P6DDR
W
H'80
H'FFFD5
Port 6 data register
P6DR
R/W
H'80
Note: * Lower 20 bits of the address in advanced mode.
Port 6 Data Direction Register (P6DDR): P6DDR is an 8-bit write-only register that can select
input or output for each pin in port 6.
Содержание H8/3008
Страница 1: ...Hitachi 16 Bit Microcomputer H8 3008 Hardware Manual ADE 602 221 Rev 1 0 9 14 00 Hitachi Ltd ...
Страница 4: ......
Страница 17: ...xii ...
Страница 70: ...54 ...
Страница 114: ...98 ...
Страница 154: ...138 ...
Страница 314: ...298 ...
Страница 412: ...396 ...
Страница 496: ...480 ...