UPD6P9 datasheet(8/45 Pages) RENESAS

8 / 45 page

µPD6P9

Data Sheet U15144EJ1V1DS

1. PIN FUNCTIONS

1.1 Normal Operation Mode

Pin No.

Symbol

Function

Output Format

After Reset

KI/O0 to KI/O7

CMOS

High-level output

Push-pullNote 1

15 to 20

3S0

—

High-impedance

(OFF mode)

4S1/LED

CMOS push-pull

High-level output

(LED)

REM

CMOS push-pull

Low-level output

6VDD

——

7XOUT

—

Low level

8XIN

(oscillation stopped)

GND

——

—

Input

(high impedance,

STOP mode

release cannot be

used)

11 to 14

KI0 to

—

Input (low-level)

KI3Note 2

Notes 1. Note that the drive capability of the low-level output side is held low.

2. In order to prevent malfunction, do not input a high-level signal to pins KI0 to KI3 (leaving these pins

open is possible, however, when these pins are left open, do not disconnect any connected pull-down

resistors) when POC is released due to supply voltage startup.

8-bit I/O port. I/O mode can be switched in 8-bit units.

In input mode, a pull-down resistor is added.

In output mode, these pins can be used as a key scan

outputs from the key matrix.

Input port.

This pin can also be used as a key return input from the

key matrix.

In input mode, the use of a pull-down resistor for the S0

and S1 ports can be specified by software in 2-bit units.

If input mode is released by software, this pin is placed

in the OFF mode and enters a high-impedance state.

I/O port.

In input mode (S1), this pin can also be used as a key

return input from the key matrix.

The use of a pull-down resistor for the S0 and S1 ports

can

specified

software

2-bit

units.

In output mode (LED), this pin becomes the remote

control transmission display output (active low). When

the remote control carrier is output from the REM output,

this pin outputs a low level from the LED output in

synchronization with the REM signal.

Infrared remote control transmission output.

The output is active high.

The carrier high-level and low-level width can each be

freely set in a range of 250 ns to 64

µs (@ fX = 4 MHz)

using software.

Power supply

These pins are connected to system clock ceramic

resonators.

GND pin

Input port.

The use of the STOP mode release of the S2 port can be

specified by software.

When using this pin as a key input from the key matrix,

enable the use of the STOP mode release (at this time,

a pull-down resistor is connected internally.)

When the STOP mode release is disabled, this pin can

be used as an input port that does not release the STOP

mode even if the release condition is established (at this

time, a pull-down resistor is not connected internally.)

4-bit input port.

These pins can be used as key return inputs to the key

matrix. The use of pull-down resistors can be specified

by software in 4-bit units.

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