ML7204-003 datasheet(95/214 Pages) LAPIS

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FEDL7204-003-02

ML7204-003

95/214

(14) CR13

R/W

CR13

FD_

SEL

BW_

SEL

TXSC

_SEL1

TXSC

_SEL0

TXBUF

_TIM

RXSC

_SEL1

RXSC

_SEL0

RXBUF

_TIM

Change enable

mode

I/E

Initial value

R/W

B7: FRAME/DMA selection register

0: FRAME access

1: DMA slave interface access

Select a transmit buffer or a receive buffer access method. Frame access is set as the initial value.

B6: MCU interface data width selection register

0: 16-bit data width interface

1: 8-bit data width interface

Select a data path width to a transmit buffer or a receive buffer. The initial value is 16 bits.

When selecting a 8-bit data width, fix D15 to D18 to “1” or “0”.

B5-B4: Speech CODEC selection register on the transmit side

( 0 , 0 ): G.729.A

( 0 , 1 ): G.711 (

-law)

( 1 , 0 ): Inhibited

( 1 , 1 ): G.711 (A-law)

B3: Transmit buffering time selection register

0: 10 ms

1: 20 ms

Select a buffering time of a transmit buffer. The initial value is 10 ms.

B2-B1: Speech CODEC selection register on the receive side

( 0 , 0 ): G.729.A

( 0 , 1 ): G.711 (

-law)

( 1 , 0 ): Inhibited

( 1 , 1 ): G.711 (A-law)

(Note) When G.711 (A-law) is selected by setting the PCM I/F coding format selection control register

(PCM_SEL[1:0]) to (1,1), decrease your target gain setting of a very next gain control following

G.711 decoder such as RXGAIN_ITS1 by 18.6dB, and increase your target gain setting of the

following gain control such as RXGAIN_PCM0 by 18.6dB.

Examples in a case where the PCM input time slot 1 enable control register (PCMI1_EN)=”1”

and the VFRO0-pin is assigned as an LSI output pin for PCMI-pin input signals are shown in a

table below.

When a tone detector (TONE_DET0 and/or TONE_DET1) located between the concerned two

gain controls is enabled, adjust the detection level accordingly.

Gain Control

Your Target (example)

Recommendation

Remarks

RXGAIN_ITS1

0008h (0dB)

000Fh (-18.6dB)

RXGAIN_PCM0

0039h (-7.03dB)

01E6h (+11.60dB)

001Ah (-13.8dB)

00DEh (+4.78dB)

000Bh (-21.3dB)

005Eh (-2.69dB)

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