PCM Protocolos compatibles
AudioPulse Code Modulation
¿Qué es PCM?
PCM (Pulse Code Modulation) in the context of digital audio interfaces refers to the synchronous serial bus commonly used for telephony, Bluetooth audio, and voice processing applications. A PCM interface uses four signals: CLK (bit clock), SYNC (frame sync), DIN (data in), and DOUT (data out). Unlike I2S which is designed for stereo hi-fi audio, the PCM interface is optimized for voice-bandwidth audio at 8 kHz or 16 kHz sample rates with 8-bit or 16-bit resolution. PCM interfaces are widely found connecting Bluetooth modules, cellular modems, and voice codecs to baseband processors. Engineers need to verify frame sync timing, clock accuracy, data alignment, and slot assignment when debugging audio path issues in these systems.
PCM Referencia rápida
| type | Serial, synchronous |
| signals | CLK, SYNC, DIN, DOUT |
| max Speed | Up to 8 MHz |
| voltage Range | 1.8V – 3.3V |
| features | Telephony audio interface |
Instrumentos Acute compatibles con PCM
Soluciones recomendadas
Recomendado para decodificación
TL4234B
Todos los productos compatibles
Familias de productos compatibles
¿Listo para analizar este protocolo?
Vea cómo los instrumentos Acute capturan y decodifican este protocolo en tiempo real. Solicite una demo o contacte a nuestro equipo.
¿Cómo analizar PCM con instrumentos Acute
Conecte su analizador lógico Acute a las señales PCM CLK, SYNC, DIN y DOUT en el codec o módulo Bluetooth.
Conecte un cable de tierra a la referencia de tierra de la placa objetivo.
En el software Acute, seleccione el PCM protocol decoder y asigne cada señal al canal de entrada correspondiente.
Configure the sample rate, bit depth, frame sync polarity, and slot count to match your audio configuration.
Capture el trafico y visualice los audio samples for both input and output directions, verifying timing and data alignment.