UPD78F9418AGK-9EU Renesas Electronics America, UPD78F9418AGK-9EU Datasheet - Page 38

• Manufacturer Part Number: UPD78F9418AGK-9EU
• Manufacturer: Renesas Electronics America

Specifications of UPD78F9418AGK-9EU

• Lead Free Status / Rohs Status: Supplier Unconfirmed

2.2 Description of Pin Functions
2.2.1 P00 to P03 (Port 0)
register 0 (PM0). When these pins are used as input port pins, an on-chip pull-up resistor can be used by setting pull-
up resistor option register 0 (PU0).
2.2.2 P20 to P27 (Port 2)
clock I/O of the serial interface, external interrupt input, and timer I/O.
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These pins constitute a 4-bit I/O port and can be set to input or output port mode in 1-bit units by using port mode
These pins constitute an 8-bit I/O port. In addition to I/O port pins, these pins can also function as the data and
The following operation modes can be specified in 1-bit units.
(1)
(2)
Port mode
In this mode, P20 to P27 function as an 8-bit I/O port. These pins can be set to input or output mode in 1-bit
units by using port mode register 2 (PM2). When used as input port pins, an on-chip pull-up resistor can be
used by setting pull-up resistor option register 1 (PU1).
Control mode
In this mode, P20 to P27 function as the data I/O and the clock I/O of the serial interface, the external
interrupt input, and timer I/O.
(a)
(b)
(c)
(d)
(e)
(f)
(g)
(h)
SI, SO
These are the serial data I/O pins of the serial interface.
SCK
This is the serial clock I/O pin of the serial interface.
RxD, TxD
These are the serial data I/O pins of the asynchronous serial interface.
ASCK
This is the serial clock input pin of the asynchronous serial interface.
TI0, TI1
These are external clock input pins for the 8-bit timer/event counter.
TO2
This is the output pin of the 8-bit timer.
TO5
This is the output pin of the 16-bit timer.
CPT5
This is the capture edge input pin.
CHAPTER 2 PIN FUNCTIONS
User’s Manual U13952EJ3V1UD