Table 9-17 Port 9 Pin Functions (cont)
Pin
Pin Functions and Selection Method
P9
1
/TxD
1
Bit TE in SCR of SCI1 and bit P9
1
DDR select the pin function as follows
TE
0
1
P9
1
DDR
0
1
—
Pin function
P9
1
input
P9
1
output
TxD
1
output
P9
0
/TxD
0
Bit TE in SCR of SCI0, bit SMIF in SCMR, and bit P9
0
DDR select the pin
function as follows
SMIF
0
1
TE
0
1
—
P9
0
DDR
0
1
—
—
Pin function
P9
0
input
P9
0
output
TxD
0
output
TxD
0
output
*
Note:
*
Functions as the TxD
0
output pin, but there are two states: one in
which the pin is driven, and another in which the pin is at high-
impedance.
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