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Commit | Line | Data |
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1 | ------------------------------------------------------------------------------- | |
2 | Vishay TOIM4232 | |
3 | ------------------------------------------------------------------------------- | |
4 | ||
5 | This is a set of example captures of the initialization and communication | |
6 | of a Vishay TOIM4232 "SIR Endec for IrDA" chip. | |
7 | ||
8 | This chip is usually connected to a TDFU4101 (or similar) infrared transceiver | |
9 | module (SIR). | |
10 | ||
11 | In this setup, a microcontroller initializes the TOIM4232 (which defaults | |
12 | to a baud rate of 9600 on its UART, pins TD_232 and RD_232), then changes | |
13 | the baud rate to 57600, and finally sends out ten bytes at 57600 (0x11, | |
14 | 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88, 0x99, 0xaa). | |
15 | ||
16 | The receiver side (another device) is also probed ("Receiver RX" pin). | |
17 | ||
18 | Details: | |
19 | http://www.vishay.com/product?docid=82546 | |
20 | http://www.vishay.com/docs/82546/toim4232.pdf | |
21 | http://www.vishay.com/ir-transceivers/list/product-81288/ | |
22 | http://www.vishay.com/docs/81288/tfdu4101.pdf | |
23 | ||
24 | Logic analyzer setup | |
25 | -------------------- | |
26 | ||
27 | The logic analyzer used was a Saleae Logic16 (at 2MHz): | |
28 | ||
29 | Probe Pin | |
30 | --------------------------- | |
31 | 0 TOIM4232 RESET | |
32 | 1 TOIM4232 BR/D | |
33 | 2 TOIM4232 RD_232 | |
34 | 3 TOIM4232 TD_232 | |
35 | 4 TOIM4232 VCC_SD | |
36 | 5 TOIM4232 TD_LED | |
37 | 6 TOIM4232 RD_LED | |
38 | 7 TOIM4232 S1 | |
39 | 8 TOIM4232 S2 | |
40 | 9 TOIM4232 TD_IR | |
41 | 10 TOIM4232 RD_IR | |
42 | 11 (unused) | |
43 | 12 Receiver RX | |
44 |