RPM872-H12 データシートの表示（PDF） - ROHM Semiconductor

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RPM872-H12

IrDA Infrared communication Module

ROHM Semiconductor 

Photo Link Module

zTerminal description

Pin No Terminal

1, 4

GND

2

VIO

3

VCC

5 PWDOWN

Circuit

VIO

RPM872-H12

Function

GND

Pin1 and Pin4 must be connected

to the ground.

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

L : OPERATION

CMOS Logic Level Input

When input is H, it will stop the receiving

circuit, Pin-PD current and transmitting

LED operation.

6

RXD

PWDOWN

VIO

VIO

300k

Receiving Data Output Terminal

CMOS Logic Level Input

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 Output

Holding TXD="H" status, LED will be

turn off approximately 48µs.

8

LEDA

− Shield Case

LED ANODE Terminal

Other power source can be used

LED

difference between LEDVCC and VCC.

This can be connected to battery kinds

of unegulated constant source by internal

constant current driver.

Connect to Ground.

Rev.A

3/6

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