HD6435348R Hitachi Semiconductor, HD6435348R Datasheet - Page 183

• Manufacturer Part Number: HD6435348R
• Description: Single-Chip Microcomputer
• Manufacturer: Hitachi Semiconductor

9.7.2 Port 6 Registers
Register Configuration: Table 9-10 lists the registers of port 6.
Table 9-10 Port 6 Registers
Name
Port 6 data direction register
Port 6 data register
System control register 2
1. Port 6 Data Direction Register (P6DDR)—H'FE89
Bit
Initial value
Read/Write
P6DDR is an 8-bit register that selects the direction of each pin in port 6.
Single-Chip Mode and Expanded Minimum Modes: A pin functions as an output pin if the
corresponding bit in P6DDR is set to 1, and as in input pin if the bit is cleared to 0.
Bits 7 to 4 are reserved. They cannot be modified and are always read as 1.
Port
6
Pin
P6
IRQ
P6
IRQ
P6
IRQ
P6
A
16
3
2
1
0
—
—
7
1
5
4
3
/ PW
/ PW
/ PW
/ IRQ
/ A
/ A
/ A
19
18
17
3
2
1
2
/
/
/
/
—
—
6
1
Figure 9-15 Pin Functions of Port 6
Mode 3
A
A
A
A
Abbreviation
P6DDR
P6DR
SYSCR2
19
18
17
16
(output)
(output)
(output)
(output)
—
—
5
1
Mode 4
P6
A
P6
A
P6
A
P6
A
19
18
17
16
166
3
2
1
0
—
—
4
1
(output)
(output)
(output)
(output)
Read/Write
W
R/W
R/W
(input) / IRQ
(input) / IRQ
(input) / IRQ
(input) / IRQ
P6
3
W
3
DDR P6
0
5
4
3
2
(input) /
(input) /
(input) /
(input) /
Initial Value
H'F0
H'F0
H'80
2
W
2
0
DDR P6
Single-Chip Mode
PW
PW
PW
Mode 1 and 2 and
P6
IRQ
P6
IRQ
P6
IRQ
P6
IRQ
1
W
3
2
1
0
1
DDR P6
0
3
2
1
5
4
3
2
(input/output) /
(input/output) /
(input/output) /
(input/output) /
(output)
(output)
(output)
(input) /
(input) /
(input) /
(input)
Address
H'FE89
H'FE8B
H'FEFD
0
W
0
DDR
0