User`s guide

4-28 Intel
®
StrongARM
®
SA-1110 Microprocessor Development Board User’s Guide
Hardware Considerations
4.12 Audio Systems
The SA-1110 Development Board audio subsystem has two primary components: the UCB1300
POTS and handset codec and the UDA1341 stereo codec. The UCB1300 is interfaced to the SA-
1110 Multimedia Communications Port (MCP) and supports POTS softmodem and medium
quality mono audio. The UDA1341 is interfaced to the SA-1110 Serial Peripheral Interface (SPI)
with the addition of a small amount of glue logic. The UDA1341 supports high quality stereo
capture and playback.
The SA-1110 Development Board’s audio subsystem includes the following resources:
• UCB1300 audio codec for phone headset and microphone
• UCB1300 phone codec for softmodem POTS connection
• UDA1341 stereo codec
• UDA1341 digital mixing of Line1 and Line2 inputs
• UDA1341 microphone inputs with automatic gain control
• UDA1341 Treble, Bass and Volume controls
• Digital loopback of UDA1341 providing board level source mixing and diagnostics
• Two built-in electret microphones
• 250 mW stereo audio amplifier to drive speaker(s) or headphones
• One built-in mini speaker
• 3.5 mm stereo headphone jack
• 2.5 mm headset and microphone jack
• Radio analog audio input
• Radio analog audio output
The SA-1110 board audio system allows the software to control the following functions:
• Selection of analog audio sources, including two microphones
• UCB1300 audio output (analog)
• Radio audio output (analog)
• Selection of digital audio sources
• UCB1300 system digital audio
• UDA1341 system digital audio
• UDA1341 controlled mixing of audio sources (using stereo loopback mode)
• UCB1300 speaker with microphone 1
• UCB1300 speaker with radio speaker
• Radio speaker with microphone 2
• Software digital mixing of audio sources
• Any OS managed digital audio streams with any analog audio source (UCB speaker, radio
speaker, microphone 1, microphone 2)