HD6475328-CP10 Datasheet, PDF (187/459 Pages) Hitachi Semiconductor – original Hitachi CMOS microcomputer unit (MCU)

P73 and P70 can be used for timer reset input (TMRI) and timer clock input (TMCI) for the 8-bit
timer, as well as for general-purpose input and output.
Table 9-13 shows how the functions of the pins of port 7 are selected.
Table 9-13 Port 7 Pin Functions
Pin
P77 /
FTOA1
Selection of Pin Functions
The function depends on the output enable A bit (OEA) of the FRT1 timer control
register (TCR) and on the P77DDR bit as follows:
OEA
P77DDR
Pin function
0
0
1
P77 input P77 output
1
0
1
FTOA1 output
P76 /
FTOB3 /
FTCI3
The function depends on the output compare B bit (OEB) of the FRT3 timer control
register (TCR) and on the P76DDR bit as follows:
OEB
P76DDR
Pin function
0
0
1
P76 input P76 output
FTCI3 input
1
0
1
FTOB3 output
P75 /
FTOB2 /
FTCI2
The function depends on the output compare B bit (OEB) of the FRT2 timer control
register (TCR) and on the P75DDR bit as follows:
OEB
P75DDR
Pin function
0
0
1
P75 input P75 output
FTCI2 input
1
0
1
FTOB2 output
P74 /
FTOB1 /
FTCI1
The function depends on the output compare B bit (OEB) of the FRT1 timer control
register (TCR) and on the P74DDR bit as follows:
OEB
P74DDR
Pin function
0
0
1
P74 input P74 output
FTCI1 input
1
0
1
FTOB1 output
170