Renesas H8S/2319 series Hardware Manual page 266

Pin Selection Method and Pin Functions
P25/TIOCB4/ This pin is used as the 8-bit timer external clock input pin when external clock
TMCI1 is selected with bits CKS2 to CKS0 in TCR1.
The pin function is switched as shown below according to the combination of
the TPU channel 4 setting by bits MD3 to MD0 in TMDR4 and bits IOB3 to
IOB0 in TIOR4, bits CCLR1 and CCLR0 in TCR4, and bit P25DDR.
TPU Channel
4 Setting
P25DDR
Pin function
TPU Channel
4 Setting
MD3 to MD0
IOB3 to IOB0
CCLR1,
CCLR0
Output
function
Note: * TIOCB4 input when MD3 to MD0 = B'0000 or B'10×× and IOB3 to IOB0
Rev. 5.00, 12/03, page 236 of 1088
Table Below (1)
TIOCB4 output
(2)
B'0000, B'01××
B'0000 B'0001 to
B'0011
B'0100
B'0101 to
B'1×××
B'0111
—
Output
—
compare
= B'10××.
—
TMCI1 input
(1) (2)
B'0010
— B'××00
— —
—
output
Table Below (2)
0 1
P25 input P25 output
TIOCB4 input *
(2) (1)
B'0011
Other than B'××00
— Other B'10
than B'10
PWM
—
mode 2
output
×: Don't care
(2)
—