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Vishay TOIM4232
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This is a set of example captures of the initialization and communication
of a Vishay TOIM4232 "SIR Endec for IrDA" chip.

This chip is usually connected to a TDFU4101 (or similar) infrared transceiver
module (SIR).

In this setup, a microcontroller initializes the TOIM4232 (which defaults
to a baud rate of 9600 on its UART, pins TD_232 and RD_232), then changes
the baud rate to 57600, and finally sends out ten bytes at 57600 (0x11,
0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88, 0x99, 0xaa).

The receiver side (another device) is also probed ("Receiver RX" pin).

Details:
http://www.vishay.com/product?docid=82546
http://www.vishay.com/docs/82546/toim4232.pdf
http://www.vishay.com/ir-transceivers/list/product-81288/
http://www.vishay.com/docs/81288/tfdu4101.pdf

Logic analyzer setup
--------------------

The logic analyzer used was a Saleae Logic16 (at 2MHz):

  Probe       Pin
  ---------------------------
  0           TOIM4232 RESET
  1           TOIM4232 BR/D
  2           TOIM4232 RD_232
  3           TOIM4232 TD_232
  4           TOIM4232 VCC_SD
  5           TOIM4232 TD_LED
  6           TOIM4232 RD_LED
  7           TOIM4232 S1
  8           TOIM4232 S2
  9           TOIM4232 TD_IR
  10          TOIM4232 RD_IR
  11          (unused)
  12          Receiver RX