ML7204-003 datasheet(48/214 Pages) LAPIS

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FEDL7204-003-02

ML7204-003

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Transmit/receive buffer control at 2-channel operation

When G.711 (

-law/A-law) is selected as the Speech CODEC coding format for both transmission and reception

operations, the mode for the following operations can be switched through the settings in SC_ EN (Speech

CODEC control register) and DC_EN (2-channel operation control register).

Transmission and reception of voice data of a single channel

(SC_EN = 1, DC_EN = 0)

Transmission and reception of 2-channel voice data

(SC_EN = 1, DC_EN = 1)

The G.711 PLC function can be enabled or disabled by setting the option in the G.711 PLC function enable

control register (G711_PLCEN). However, G711_PLCEN must be set to “0” (disabled) before activating

2-channel operation.

Figure 30 shows the transition of Speech CODEC operation modes when G.711 (

-law/A-law) is selected as the

Speech CODEC coding format for both transmission and reception operations.

Figure 30 Transition of Speech CODEC Operation Modes (G.711

-law/A-law)

See Figures 16, 17, 20, and 21 for details of the transmit/receive buffer control method in single-channel

operation.

See below for the details of the transmit/receive control method in 2-channel operation in Speech CODEC.

Stop

SC_EN=0, DC_EN=0

Single-channel

operation

G.711 PLC disabled

SC_EN=1, DC_EN=0

G711_PLCEN=0

2-channel

operation

G.711 PLC disabled

SC_EN=1, DC_EN=1

G711_PLCEN=0

DC_EN=1

DC_EN=0

SC_EN=1

DC_EN=1

SC_EN=0

DC_EN=0

SC_EN=1, G711_PLCEN=1

SC_EN=0

SC_EN=1

SC_EN=0, G711_PLCEN=0

SC_EN=1,DC_EN=0,

G711_PLCEN=1

Single-channel

operation

G.711 PLC enabled

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