toim5232 Vishay, toim5232 Datasheet - Page 12

• Manufacturer Part Number: toim5232
• Description: Sir Endec For Irda? Applications Integrated Interface Circuit
• Manufacturer: Vishay

TOIM5232
Vishay Semiconductors
Additionally, with the programmable output S1 of the endec
the echo suppression feature can be switched on and off for
testing. The default mode is echo-off. To enable the echo, S1
is to be set inactive/low. (See the chapter for programming
the TOIM4232, TOIM5232).
The oscilloscope diagrams are shown in figure 11.
Channel 2 shows the echo signal on the RXD output of the
TFDU4101
TFDU4300 is an echo-off design and would not show this).
Channel 1 is the signal used for gating the path from the
transceiver RXD output to the endec. On channel 3 the signal
at the input of the endec is shown with a residual signal.
Finally, the output to the RS232 port, RD_232, is clean
without any noise signal.
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12
1->
2->
3->
4->
21037
1) Ch1: TOIM4232; TD_232, pin 4, vertical scale: 2 V/div.,
2) Ch2: TFDU4101; RXD, pin 4 (IR)
3) Ch3: TOIM4232; RD_IR, pin 15
4) Ch4: TOIM4232; RD_232, pin 3
horizontal scale: 20 µs/div.
transceiver
Fig. 11 - Echo-Suppression
[e-mail], [e-mail],
during
For technical questions within your region, please contact one of the following:
transmission
SIR Endec for IrDA
Integrated Interface Circuit
(Note:
®
Applications
[e-mail]
Document Number: 81749
Rev. 1.2, 17-Nov-10