Renesas H8S/2319 series Hardware Manual page 270

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
P21DDR
Pin function
TPU Channel
3 Setting
MD3 to MD0
IOB3 to IOB0
CCLR2 to
CCLR0
Output
function
Note: * TIOCB3 input when MD3 to MD0 = B'0000 and IOB3 to IOB0 =
Rev. 5.00, 12/03, page 240 of 1088
Table Below (1)
TIOCB3 output
(2)
B'0000
B'0000 B'0001 to
B'0011
B'0100
B'0101 to
B'1×××
B'0111
—
— Output
compare
B'10××.
—
(1) (2)
B'0010
— B'××00
— —
—
output
Table Below (2)
0 1
P21 input P21 output
TIOCB3 input *
(2) (1)
B'0011
Other than B'××00
— Other B'010
than
B'010
— PWM
mode 2
output
×: Don't care
(2)
—