RPM841-H11E2A 데이터 시트보기 (PDF) - ROHM Semiconductor

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RPM841-H11E2A

IrDA Infrared Communication Module

ROHM Semiconductor 

Photo Link Module

zLED Operation Mode Table

PWDOWN

(5pin)

TX-RC

(4pin)

TXD

(7pin)

LED

Emitting Mode

IrDA Receiver

Operation Condition

L

L

L

OFF

ON

L

L

IrDA

ON

L

L

RC

ON

H

L

L

OFF

OFF

H

L

OFF

OFF

H

L

RC

OFF

Notes) Please be sure to set up the TX-RC (2pin) and the TXD (3pin) input to be ''L'' (under 0.3V)

except transmitting data (for < 90µs. ON Duty 50%).

of TX-RC (2pin) and TXD (3pin) in the table above is supposed to be the pulse input.

When either TX-RC (2pin) input TXD (3pin) input keeps the state of ''H'' (more than appproximately 48µs),

LED will be turned off due to LED pulse width limiting circuit if the pulse is input from the other terminal.

Therefore, don't use as the normal transmitting is impossible.

Please input the pulse when both TX-RC (2pin) and TXD (3pin) are ''L''.

RPM841-H11

zInterface operating timing

(Emitting side)

(1) When TXD output for IrDA and TXD output for controller are different lines.

1

LEDA

LEDVCC

RC Transmitting

TX-RC

Controller

(BU787X etc)

TXD

RXD

PWDOWN

IrDA

Controller

VCC

VCC

GND

7

5/9

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