HD6413308 Hitachi Semiconductor, HD6413308 Datasheet - Page 112

• Manufacturer Part Number: HD6413308
• Description: Hitachi Single-Chip MicroComputer
• Manufacturer: Hitachi Semiconductor

See section 4 “Exception Handling” and section 6, “Free-Running Timer Module” for details of the
free-running timer and interrupts.
Pins of port 6 can drive a single TTL load and a 90pF capacitive load when they are used as output
pins. They can also drive a Darlington pair. When they are used as input pins, they have
programmable MOS pull-ups.
Table 5-13 details the port 6 registers.
Table 5-13. Port 6 Registers
Name
Port 6 data direction register P6DDR
Port 6 data register
Port 6 Data Direction Register (P6DDR)—H’FFB9
Bit
Initial value
Read/Write
P6DDR is an 8-bit register that selects the direction of each pin in port 6. A pin functions as an
output pin if the corresponding bit in P6DDR is set to “1,” and as an input pin if the bit is cleared to
“0.”
Port 6 Data Register (P6DR)—H’FFBB
Bit
Initial value
Read/Write
P6DR is an 8-bit register containing the data for pins P6
output pins (P6DDR = "1") it reads the value in the P6DR latch, but for input pins (P6DDR = "0"),
it obtains the logic level directly from the pin, bypassing the P6DR latch. This also applies to pins
used for input and output of timer and interrupt signals.
P6
R/W
7
P6
W
DDR P6
7
0
7
0
7
R/W
6
P6
Abbreviation
P6DR
W
DDR P6
6
0
6
0
6
R/W
5
P6
W
DDR P6
5
0
5
0
5
Read/Write Initial value
W
R/W
R/W
97
4
P6
W
DDR P6
4
0
4
0
4
7
to P6
R/W
3
P6
W
DDR P6
3
0
3
0
3
H’00
H’00
0
. When the CPU reads P6DR, for
R/W
2
P6
W
DDR P6
2
0
2
0
2
R/W
1
P6
W
Address
H’FFB9
H’FFBB
DDR P6
1
0
1
0
1
R/W
0
P6
W
DDR
0
0
0
0
0