UPD17245MC-XXX-5A4 datasheet(10/102 Pages) NEC

Part #	UPD17245MC-XXX-5A4

Description	4-BIT SINGLE-CHIP MICROCONTROLLERS FOR SMALL GENERAL-PURPOSE INFRARED REMOTE CONTROL TRANSMITTERS

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Manufacturer	NEC [NEC]

Direct Link	http://www.nec.com/

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Data Sheet U15002EJ1V0DS

µPD17240, 17241, 17242, 17243, 17244, 17245, 17246

1.1

Pin Function List (2/3)

Pin No.

Pin Name

Function

Output Format

After Reset

4

P0E0

These pins constitute a 4-bit I/O port that can be set to the input or

When key

CMOS input

5

P0E1

output mode in 1-bit units.

matrix is

(when key

6

P0E2

If this port is set to the input mode when a key matrix is used, it

used: N-ch

matrix is not

7

P0E3

functions as a CMOS input port with a pull-up resistor and can be

open-drain,

used and no

used to input key return signals. If one of the pins of this port

when key

resistor

goes low, the standby mode is released.

matrix is not

connected)

If this port is set to the output mode when a key matrix is used, it

used: CMOS

functions as an N-ch open-drain output port and can be used to

push-pull

output key matrix signals.

If this port is set to the input mode when a key matrix is not used,

it functions as a CMOS input port to/from which a resistor can be

connected/disconnected in 1-bit units. If this port is set in the

output mode when a key matrix is not used, it functions as a high-

current CMOS output port.

8

REM

Outputs transfer signal for infrared remote controller.

CMOS

Low-level

Active-high output.

push-pull

output

9VDD

Power supply

––

10

XOUT

Connects ceramic resonator for system clock oscillation.

–

(Oscillation

11

XIN

A capacitor (15 pF) for oscillation can be connected by using a

stops)

mask option.

12

GND

Ground

––

13

RESET

System reset input. Turns ON pull down resistor if the POC or

–

Input

watchdog timer overflows and if the stack pointer overflows or

underflows, and resets the system. Usually, the pull-down resistor

is ON.

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UPD17245MC-XXX-5A4 Datasheet(PDF) 10 Page - NEC

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