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10.6.2
Register Configuration
Table 10-9 shows the port 9 register configuration. Port 9 is an input-only port, and does not have
a data direction register or data register.
Table 10-9 Port 9 Registers
Name
Port 9 register
Note: * Lower 16 bits of the address.
Port 9 Register (PORT9): The pin states are always read when a port 9 read is performed.
Bit
:
Initial value :
R/W
:
Note: * Determined by state of pins P97 to P90.
10.6.3
Pin Functions
Port 9 pins are multipurpose pins which function as A/D converter analog input pins (AN8 to
AN15) and D/A converter analog output pins (DA2, DA3).
362
Abbreviation
PORT9
7
6
P97
P96
—*
—*
R
R
R/W
R
5
4
P95
P94
—*
—*
R
R
Initial Value
Undefined
3
2
P93
P92
—*
—*
R
R
Address*
H'FFB8
1
0
P91
P90
—*
—*
R
R
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