HD6413008F RENESAS [Renesas Technology Corp], HD6413008F Datasheet - Page 192

• Manufacturer Part Number: HD6413008F
• Description: Renesas 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Series
• Manufacturer: RENESAS [Renesas Technology Corp]

7. I/O Ports
7.3
7.3.1
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 7.5 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.
7.3.2
Table 7.4 summarizes the registers of port 6.
Table 7.4
Address*
H'EE005
H'FFFD5
Note:
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.
Rev.4.00 Aug. 20, 2007 Page 148 of 638
REJ09B0395-0400
* Lower 20 bits of the address in advanced mode.
Register Descriptions
Port 6
Overview
Port 6 Registers
Name
Port 6 data direction register
Port 6 data register
Port 6
Figure 7.2 Port 6 Pin Configuration
Port 6 pins
P6 /
P6 /
P6 /
P6 /
P6 /
P6 /
P6 /
P6 /
7
6
5
4
3
2
1
0
φ
LWR
HWR
RD
AS
BACK
BREQ
WAIT
Abbreviation
P6DDR
P6DR
P6
LWR (output)
HWR (output)
RD (output)
AS (output)
P6
P6
P6
Modes 1 to 4
(expanded modes)
7
2
1
0
(input)/φ (output)
(input/output)/BACK (output)
(input/output)/BREQ (input)
(input/output)/WAIT (input)
R/W
W
R/W
Initial Value
H'80
H'80