RPM882-H14
Photo Link Module
5/9
LED Operation Mode Table
PWDOWN
(5pin)
L
L
L
H
H
H
TX-RC
(4pin)
L
L
L
L
TXD
(7pin)
LED
Emitting Mode
IrDA Receiver
Operation Condition
L
L
L
L
OFF
IrDA
RC
OFF
RC
RC
ON
ON
ON
OFF
OFF
OFF
Notes) Please be sure to set up the TX-RC (4pin) and the TXD (7pin) input to be ''L'' (under 0.3V)
except transmitting data (for < 90祍. ON Duty 50%).
of TX-RC (4pin) and TXD (7pin) in the table above is supposed to be the pulse input.
When either TX-RC (4pin) input TXD (7pin) input keeps the state of ''H'' (more than appproximately 48祍),
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 (4pin) and TXD (7pin) are ''L''.
Interface operating timing
(Emitting side)
(1) When TXD output for IrDA and TXD output for remote controller is 1 line.
IrDA
IrDA
RC
RC
TXD
(7pin)
Min 1祍
Min 1祍
Min 1祍
Min 1祍
TX-RC
(4pin)
PWDOWN
(5pin)
LED Emitting
If TX-RC or TXD input pulse width is wider than 48?/SPAN>s, output LED emitting pulse will be turn off approximately 48?/SPAN>s.
mitting Mode
( "L" )
VCC
GND
1
8
VIO
VCC
LEDVCC
VIO
TX-RC
PWDOWN
IrDA / RC
Controller
RXD
TXD
LEDA
Input
Condition
PWDOWN
L
L
H
H
TXD
LED Mode
L
L
OFF
IrDA
OFF
RC
Recriver circuit
ON
ON
OFF
OFF
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