Datasheet

Section 9 I/O Ports
Rev.6.00 Mar. 18, 2009 Page 363 of 980
REJ09B0050-0600
9.7 Port 9
Port 9 is a 2-bit input-only port. Port 9 has the following register.
• Port 9 register (PORT9)
9.7.1 Port 9 Register (PORT9)
PORT9 is an 8-bit read-only register that shows port 4 pin states.
PORT9 cannot be modified.
Bit Bit Name Initial Value R/W Description
7, 6 — Undefined R Reserved
If read they will return an undefined value.
5 P95 —
*
R
4 P94 —
*
R
The pin states are always read when a port 9 read
is performed.
3 — Undefined R
2 — Undefined R
Reserved
If read they will return an undefined value.
1 — Undefined R
0 — Undefined R
Note: * Determined by the states of pins P95 and P94.
9.7.2 Pin Functions
Port 9 also functions as the pins for A/D converter analog input and D/A converter analog output.
The correspondence between pins are as follows.
P95/AN13/DA3
AN13 input Pin function
DA3 output
P94/AN12/DA2
AN12 input Pin function
DA2 output