Allwinner A20 - Analog Audio Input

A20 User Manual (Revision 1.2) Copyright © 2013 Allwinner Technology Co., Ltd. All Rights Reserved. Page 14 / 812
● One low-noise analog microphone bias
● Dedicated headphone outputs
● Two mixers to meet different requirements
– Output mixer for LINEINL/R, FMINL/R, MIC1/2 and Stereo DAC output
–
ADC record mixer for LINEINL/R, FMINL/R, MIC1/2 and Stereo DAC output
Analog Audio Input
● Support four analog audio inputs
– Two microphone inputs
– Differential or stereo line-in input
– Stereo FM-in input
● Stereo audio ADC
– 96dBA SNR
– Support 8KHz ~ 48KHz ADC sample rate
RTP
● 12-bit SAR ADC
● Dual touch detection
● Sampling frequency up to 2MHz
Connectivity
USB2.0 DRD
● Dual-Role Decive(DRD) Controller
● Support High-Speed (HS, 480-Mbps), Full-Speed (FS, 12-Mbps), and Low-Speed (LS, 1.5-Mbps) in
Host mode
● Support High-Speed (HS, 480-Mbps), Full-Speed (FS, 12-Mbps) in Device mode
● Support up to 5 user-configurable endpoints for Bulk , Isochronous, Control and Interrupt
USB EHCI/OHCI
● Two EHCI/OHCI-compliant hosts
EMAC
● Support 10/100Mbps MII data transfer rate
GMAC
● Comply with the IEEE 802.3-2002 standard
● Programmable frame length to support Standard or Jumbo Ethernet frames with size up to 16KB
● Support 10/100/1000Mbps data transfer rates RGMII interface to communicate with an external Gigabit
PHY
● Support 10/100Mbps MII PHY interface
Digital Audio In/Out