LA74308LP

No.A0898-4/16

Description of the Content of Serial Communication

DATA No.

Parameter

Default

LSB

0

LINE MUTE Tr.

0:OFF, 1:ON

1

1

VREF capacitance charging circuit SW

0:OFF, 1:ON

1

2

MIC AMP POWER SW

0:ON, 1:OFF

1

3

ALC AMP POWER SW

0:ON, 1:OFF

1

4

REC/PB changeover SW

0:PB, 1:REC

0

5

LPF characteristics (TRAP) changeover SW

0:16kHz, 1:8kHz

1

6

REC AMP POWER SW

0:ON, 1:OFF

1

7

LINE OUT POWER SW

0:ON, 1:OFF

1

8

LINE MUTE SW

0:OFF, 1:ON

1

9

SPK POWER SW

0:ON, 1:OFF

1

10

DATA=1

1 1 1 1 1:VOL MAX

0

11

DATA=2

0

12

DATA=4

0 0 0 0 0:VOL MIN (MUTE)

0

13

DATA=8

0

14

DATA=16

0

MSB

15

BIAS MODE

0:ACTIVE MODE, 1:BIAS MODE

0

Serial Transmission Timing

• fMAX

(Max clock frequency)

1.0MHz

• tWL

(Clock pulse width: Low)

500ns or more

• tWH

(Clock pulse width: High)

500ns or more

• tCS

(Chip enable setup time)

500ns or more

• tCH

(Chip enable hold time)

500ns or more

• tDS

(Data setup time)

500ns or more

• tDH

(Data hold time)

500ns or more

• tWC

(Chip enable pulse width)

500ns or more

• VIH

(High voltage lower limit)

2.3V to 3.5V

• VIL

(Low voltage upper limit)

0.0V to 0.7V

* EVR setting (the numeral shown in the left is decimal.

For characteristics, see P12.)

fMAX

tWH

CS

CLOCK

tCS

tWL

tCH

DATA

LSB

tDS

tDH

MSB

tWC

VIL

VIH

VIH

VIL

VIH

VIL