Motorola C1002 Instructions d'exploitation télécharger pdf (Page 37)

100

101

Controller Board 5-9

2.10 Audio

The audio circuitry consists of both analog and digital audio paths. Figure 5-8 shows the basic block

diagram of the audio interconnections.

Figure 5-8: Audio Block Diagram

2.10.1 Receive Audio

The receive audio data comes from the ABACUS III IC (U600) to the OMAP McBSP2 pin. The DSP

decodes the data and sends it out through SSI lines to MAKO SSI pin. The SSI bus is comprised of

four lines: clock, frame sync, Rx data, and Tx data. These four lines provide data to the MAKO

(U3000) using a packet frame structure consisting of four slots. The actual audio data is transferred to

the MAKO in the first slot of each frame using 16-bit pulse-code modulated PCM audio. The MAKO

codec filters and converts the digital data into an analog audio signal, and this signal is sent to a

programmable gain amplifier. The analog audio circuitry routes the audio to the internal or external

port.

EXT_SPKR_P

PA_IN_P

PA_IN_M

LSPKext

LSPKint

EXT_SPKR_M

INT_SPKR_P

INT_SPKR_M

INT_MIC_P

ADC

INT_MIC_M

EXT_MIC_P

EXT_MIC_M

VCM1

LESCIM

DAC

VC_OUT_P

VC_OUT_M

MIC BIAS

VC_DCLK

VC_FSYNC

VC_TX

VC_TX3V

VC_RX

MAKO

INT_MIC_P

INT_MIC_M

MIC BIAS

1.0uF

0.1uF

15nF

270 Ohm

Base-Band

Processor

UCM_SS

V02_O(1.875V) for OMAP

V06(2.9V) for Patriot

DIN

CLK

SYNC

DOUT

10k

1 2 ... 32 33 34 35 36 37 38 39 40 41 42 ... 100 101

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Motorola C1002 Instructions d'exploitation Page 37

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