213
Pin
Selection Method and Pin Functions
P20/PO0/
TIOCA3/
IRQ8
The pin function is switched as shown below according to the combination of the
TPU channel 3 settings (by bits MD3 to MD0 in TMDR3, bits IOA3 to IOA0 in
TIOR3H, and bits CCLR2 to CCLR0 in TCR3), bit NDER0 in NDERL, bit
P20DDR, and bit ITS8 in ITSR.
TPU channel 3
settings
(1) in table
below
(2) in table below
P20DDR
—
0
1
1
NDER0
—
—
0
1
Pin function
TIOCA3 output
P20 input
P20 output
PO0 output
TIOCA3 input
*
1
IRQ8
interrupt input pin
*
2
Notes: 1. TIOCA3 input when MD3 to MD0 = B'0000 and IOA3 to IOA0 = B'10xx.
2.
IRQ8
input when ITS8 = 1.
TPU channel 3
settings
(2)
(1)
(2)
(1)
(1)
(2)
MD3 to MD0
B'0001 to B'01xx
B'001x
B'0010
B'0011
IOA3 to IOA0
B'0000
B'0100
B'1xxx
B'0001 to B'0011
B'0101 to B'0111
B'xx00
Other
than
B'xx00
Other than B'xx00
CCLR2 to
CCLR0
—
—
—
—
Other
than
B'001
B'001
Output function
—
Output compare
output
—
PWM
*
3
mode 1
output
PWM
mode 2
output
—
x: Don’t care
Note:
3. TIOCB3 output disabled.
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