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CHAPTER 2 PIN FUNCTIONS
User’s Manual U15017EJ2V0UD
(b) SCK1
This pin functions as a serial clock I/O pin for serial interface 1.
(c) TIO50 and TIO51
TIO50:
timer.
TIO51:
This pin functions as an external count clock input pin and timer output pin for the 8-bit PWM
This pin functions as an external count clock input pin and timer output pin for the 8-bit PWM
timer as well as a capture trigger signal input pin for the 16-bit capture/compare register 00
(CR00).
(d) INTP0, INTP1, and INTP2
These pins function as external interrupt request input pins, for which a valid edge (rising, falling, or rising
and falling) can be specified.
2.2.7 P70 to P77 (Port 7)
P70 to P77 constitute an 8-bit I/O port. These pins are also used as VFD controller/driver output pins.
The following operation modes can be specified in 1-bit units.
(1) Port mode
In this mode, P70 to P77 function as an 8-bit I/O port.
These pins are P-ch open-drain pins. Pull-down resistors can be specified for these pins in the mask ROM
versions in 1-bit units using a mask option. The
μ
PD78F4976A does not have pull-down resistors.
(2) Control mode
In this mode, P70 to P77 function as the output pins of the VFD controller/driver (FIP16 to FIP23).
2.2.8 P80 to P87 (Port 8)
P80 to P87 constitute an 8-bit I/O port. These pins are also used as VFD controller/driver output pins.
The following operation modes can be specified in 1-bit units.
(1) Port mode
In this mode, P80 to P87 function as an 8-bit I/O port.
These pins are P-ch open-drain pins. Pull-down resistors can be specified for these pins in the mask ROM
versions in 1-bit units using a mask option. The
μ
PD78F4976A does not have pull-down resistors.
(2) Control mode
In this mode, P80 to P87 function as the output pins of the VFD controller/driver (FIP24 to FIP31).
2.2.9 P90 to P97 (Port 9)
P90 to P97 constitute an 8-bit I/O port. These pins are also used as VFD controller/driver output pins.
The following operation modes can be specified in 1-bit units.
(1) Port mode
In this mode, P90 to P97 function as an 8-bit I/O port.
These pins are P-ch open-drain pins. Pull-down resistors can be specified for these pins in the mask ROM
versions in 1-bit units using a mask option. The
μ
PD78F4976A does not have pull-down resistors.
(2) Control mode
In this mode, P90 to P97 function as the output pins of the VFD controller/driver (FIP32 to FIP39).