Renesas H8S/2319 series Hardware Manual page 268

Pin Selection Method and Pin Functions
P23/TIOCD3/ This pin is used as the 8-bit timer external clock input pin when external clock
TMCI0 is selected with bits CKS2 to CKS0 in TCR0.
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 IOD3 to IOD0 in
TIOR3L, bits CCLR2 to CCLR0 in TCR3, and bit P23DDR.
TPU Channel
3 Setting
P23DDR
Pin function
TPU Channel
3 Setting
MD3 to MD0
IOD3 to IOD0
CCLR2 to
CCLR0
Output
function
Note: * TIOCD3 input when MD3 to MD0 = B'0000 and IOD3 to IOD0 =
Rev. 5.00, 12/03, page 238 of 1088
Table Below (1)
TIOCD3 output
(2)
B'0000
B'0000 B'0001 to
B'0011
B'0100
B'0101 to
B'1×××
B'0111
—
— Output
compare
B'10××.
—
TMCI0 input
(1) (2)
B'0010
— B'××00
— —
—
output
Table Below (2)
0 1
P23 input P23 output
TIOCD3 input *
(2) (1)
B'0011
Other than B'××00
— Other B'110
than
B'110
— PWM
mode 2
output
×: Don't care
(2)
—