HD6417750RF240V Datasheet, PDF (172/606 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer H8S Family/H8S/2600 Series

Section 9 I/O Ports
9.3 Port 9
Port 9 is a 4-bit input-only port. Port 9 pins also function as A/D converter analog input pins. Port
9 has the following registers. For details on register addresses, refer to appendix A, On-Chip I/O
Register.
• Port 9 register (PORT9)
9.3.1 Port 9 Register (PORT9)
PORT9 is an 8-bit read-only register that shows port 9 pin states.
PORT9 cannot be modified.
Bit Bit Name Initial Value R/W Description
7—
6—
Undefined R
Undefined R
The pin states are always read when a port 9 read
is performed.
5—
Undefined R
4—
3 P93
2 P92
1 P91
0 P90
Undefined R
Undefined^* R
Undefined^* R
Undefined^* R
Undefined^* R
Note: * Determined by the states of pins P93 to P90.
Rev. 7.00 Sep. 11, 2009 Page 136 of 566
REJ09B0211-0700