
CHAPTER 2 PIN FUNCTIONS
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(c) TI1
Timer input pin of the 8-bit remote control timer.
(d) TIO50 and TIO51
Capture trigger input pin of the 8-bit PWM timers and timer output pin.
2.2.4 P40 through P47 (Port 4)
P40 through 47 constitute an 8-bit I/O port. This port can be set in the input or output mode in 1-bit units by using
the port mode register 4 (PM4). When it is used as an input port, the internal pull-up resistor can be connected by
using the pull-up resistor option register 4 (PU4).
This port can directly drive an LED.
2.2.5 P50 through P57 (Port 5)
P50 through 57 constitute an 8-bit I/O port. This port can be set in the input or output mode in 1-bit units by using
the port mode register 5 (PM5).
P50 through P57 are N-ch open-drain pins. Pull-up resistors can be connected to these pins of the mask ROM
models by mask option. The
m
PD78F0228 does not have pull-up resistors.
This port can directly drive an LED.
2.2.6 P60 through P67 (Port 6)
P60 through 67 constitute an 8-bit I/O port. This port can be set in the input or output mode in 1-bit units by using
the port mode register 6 (PM6).
P60 through P67 are N-ch open-drain pins. Pull-up resistors can be connected to these pins of the mask ROM
models by mask option. The
m
PD78F0228 does not have pull-up resistors.
This port can directly drive an LED.
2.2.7 P70 through P77 (Port 7)
P70 through P77 constitute an 8-bit I/O port. These pins are also used as FIP controller/driver output pins.
The following operation modes can be specified in 1-bit units.
(1) Port mode
P70 through P77 function as an 8-bit I/O port in this mode.
These pins are P-ch open-drain pins. Pull-down resistors can be connected to these pins of the mask ROM
models by mask option. The
m
PD78F0228 does not have pull-down resistors.
(2) Control mode
In this mode, P70 through P77 function as the output pins of the FIP controller/driver (FIP16 through FIP23).
2.2.8 P80 through P87 (Port 8)
P80 through P87 constitute an 8-bit I/O port. These pins are also used as FIP controller/driver output pins.
The following operation modes can be specified in 1-bit units.
(1) Port mode
P80 through P87 function as an 8-bit I/O port in this mode.
These pins are P-ch open-drain pins. Pull-down resistors can be connected to these pins of the mask ROM
models by mask option. The
m
PD78F0228 does not have pull-down resistors.
(2) Control mode
In this mode, P80 through P87 function as the output pins of the FIP controller/driver (FIP24 through FIP31).