RPM872 データシートの表示（PDF） - ROHM Semiconductor

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RPM872

IrDA infrared communication module

ROHM Semiconductor 

Photo Link Module

zTerminal description

Pin No Terminal

1, 4

GND

Circuit

RPM872

GND

Function

2

VIO

3

VCC

5 PWDOWN

6

RXD

VIO

PWDOWN

VIO

VIO

300k

VIO

Supply voltage for I/O pins (PWDOWN,

RXD, TXD)

VCC

Supply voltage for Transceiver circuits.

For preventing from infection,

connect a capacitor between

VCC(3pin) and GND(4pin).

Power-down Control Terminal

H : POWERDOWN MODE

L : OPERATING MODE

CMOS logic level input

When input is H, it will stop the receiving

circuit, Pin-PD current and transmitting

LED operation.

Receiving Data Output Terminal

CMOS logic level output

When PWDOWN (5pin) = H, the RXD

output will be pulled up to

VIO at approximately 300kΩ.

7

TXD

VIO

600k

Transmitting Data Input Terminal

H : LED (PWDOWN = L)

CMOS logic level input

Holding TXD = "H"status, LED will

be turn off approximately 48µs.

8

LEDA

LED ANODE Terminal

Other power source can be used

LED

difference between LEDVCC and VCC.

This can be connected to battery kinds

of unregulated voltage source by internal

constant current driver.

Rev.B

3/6

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