Datasheet

Section 8 I/O Ports
Rev.7.00 Feb. 14, 2007 page 244 of 1108
REJ09B0089-0700
Pin Selection Method and Pin Functions
P21/TIOCB3 The pin function is switched as shown below according to the combination of
the TPU channel 3 setting by bits MD3 to MD0 in TMDR3, bits IOB3 to IOB0 in
TIOR3H, bits CCLR2 to CCLR0 in TCR3, and bit P21DDR.
TPU Channel
3 Setting Table Below (1) Table Below (2)
P21DDR — 0 1
Pin function TIOCB3 output P21 input P21 output
TIOCB3 input
*
TPU Channel
3 Setting (2) (1) (2) (2) (1) (2)
MD3 to MD0 B'0000 B'0010 B'0011
IOB3 to IOB0 B'0000
B'0100
B'1×××
B'0001 to
B'0011
B'0101 to
B'0111
— B'××00 Other than B'××00
CCLR2 to
CCLR0
— — — — Other
than
B'010
B'010
Output
function
— Output
compare
output
— — PWM
mode 2
output
—
×: Don’t care
Note: * TIOCB3 input when MD3 to MD0 = B'0000 and IOB3 to IOB0 = B'10××.