212
Pin
Selection Method and Pin Functions
P21/PO1/
TIOCB3/
IRQ9
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 IOB3 to IOB0 in
TIOR3H, and bits CCLR2 to CCLR0 in TCR3), bit NDER1 in NDERL, bit
P21DDR, and bit ITS9 in ITSR.
TPU channel 3
settings
(1) in table
below
(2) in table below
P21DDR
—
0
1
1
NDER1
—
—
0
1
Pin function
TIOCB3 output
P21 input
P21 output
PO1 output
TIOCB3 input
*
1
IRQ9
interrupt input pin
*
2
Notes: 1. TIOCB3 input when MD3 to MD0 = B'0000 and IOB3 to IOB0 = B'10xx.
2.
IRQ9
input when ITS9 = 1.
TPU channel 3
settings
(2)
(1)
(2)
(2)
(1)
(2)
MD3 to MD0
B'0001 to B'0011
B'0010
B'0011
IOB3 to IOB0
B'0000
B'0100
B'1xxx
B'0001 to B'0011
B'0101 to B'0111
—
B'xx00
Other than B'xx00
CCLR2 to
CCLR0
—
—
—
—
Other
than
B'010
B'010
Output function
—
Output compare
output
—
—
PWM
mode 2
output
—
x: Don’t care
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