projects / sigrok-dumps.git / blame
| Commit | Line | Data |
|---|---|---|
| 8e55390f UH |
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 |