HD6475328-CP10 Datasheet, PDF (188/459 Pages) Hitachi Semiconductor – original Hitachi CMOS microcomputer unit (MCU)

Table 9-13 Port 7 Pin Functions (cont)
Pin
P73 / FTI3 /
TMRI
Selection of Pin Functions
The function depends on the counter clear bits 1 and 0 (CCLR1 and CCLR0) in the
timer control register (TCR) of the 8-bit timer, and on the P73DDR bit as follows:
CCLR1, CCLR0: At least one bit is “0.” Both bits are set to “1”
P73DDR
0
1
Pin function P73 input P73 output
FTI3 input and TMRI input
P72 / FTI2
P72DDR
Pin function
0
1
P72 input P72 output
FTI2 input
P71 / FTI1
P71DDR
Pin function
0
1
P71 input P71 output
FTI1 input
P70 / TMCI
This pin always has a general-purpose input/output function, and can simultaneously
be used for external clock input for the 8-bit timer, depending on clock select bits 2 to
0 (CKS2, CKS1, and CKS0) in the timer control register (TCR). See section 11, “8-
bit Timer” for details.
P70DDR
Pin function
0
1
P70 input P70 output
TMCI input
171