W681307 Datasheet, PDF (56/160 Pages) Winbond – USB1.1 CODEC Microprocessor Control Unit with 32KB Mask ROM and 4KB RAM

W681307
10. SPEECH INTERFACE
10.1
Overview
The Speech Interface allows the MCU chip to be connected to one or more of the following:
• External PCM CODEC and Echo Canceller.
• IO Ports which can be used when the external Speech Expansion Interface is not required.
• A test interface to and from the on-chip linear CODEC.
The Speech Interface Block also connects with the on-chip linear CODEC.
The Speech interface also contains three programmable outputs, which are used to control certain pins.
10.2
Functionality
Figure 10-1 shows the speech interface block diagram.
SPEECH PROCESSOR INTERFACE
Pcm0out[13:0]
Pcm0in[13:0]
Pcm1out[13:0]
Pcm1in[13:0]
Pcm2out[13:0]
Pcm2in[13:0]
adpcm_count[7:0]
adpcm_clock
PcmI[0] ^{(PcmIn0/PcmClockI)}
PcmI[1]
PcmO[1]
PcmD[1]
(PcmIn1)
PcmI[2]
PcmO[2]
PcmD[2]
PcmI[3]
PcmO[3]
PcmD[3]
(PcmOut1)
PcmI[4]
PcmO[4]
PcmD[4]
(PcmClock)
PcmI[5]
PcmO[5]
PcmD[5]
(PcmSyncO)
PCM
Serial
Interface
(PcmOut0)
SpeechIntrpt
SysClock2
SysClock3
SysClock5
SpeechCtrl1
SpeechIoD
SpeechIoIp
SpeechIoOp
SpeechIoMsk
SpeechCtrl0
ADrd DAwr ovclk
ref32k
ref8k
DFAin[13:0]
D[13:0]
DM
SysClock5
DIShp
ute
TxM
ON CHIP CODEC INTERFACE
Speech
Interface
Register
IntWriteData[7..0]
SpReadData[7:0]
SpReadValid
IntAddress[9..0]
SysClock2
SysClock3
RADCTRL[3:0]
Figure 10-1 Speech Interface Block Diagram
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Publication Release Date: May, 2007
Revision 1.3