RPM841-H11E2A データシートの表示（PDF） - ROHM Semiconductor
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RPM841-H11E2A Datasheet PDF : 10 Pages
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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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