F41x voice recorder reference design

The Voice Recorder Reference Design illustrates how to use a C8051F411 for voice application. It is a practical demonstration of C8051F41x high performance analog and CPU throughput capability.

The voice recorder uses DPCM (Differential Pulse Code Modulated) compression to convert 12-bit samples of the ADC and IDAC to 6-bits at an effective sampling rate of 8kHz
This compression allows for an extended recording time without audibly losing sound quality
Additional ADC features such as Burst Mode and Repeat Count are utilized to improve the quality of the sound samples during the recording process
The C8051F411 Suspend operating mode also allows the voice recorder to reduce power consumption when idle

The Voice Recorder (VOICE-RECORD-RD) Reference Design Kit contains the following items:
C8051F411-GM Voice Recorder board
Headphones
Universal Power Supply
9V battery
Voice Recorder Quick-Start Guide
Voice Recorder Reference Design Kit CD-ROM. CD contents include the following:
Voice Recorder Reference Design Kit User’s Guide
Reference Design Documentation (AN278)
Voice Recorder Reference Design Source Code (AN278)
C8051F41x Device Data Sheet