7

Video ICs

BA7182AS

H

L

—

0.0 ~ 1.2

DFF IN

Ch2 (PRE IN2 7pin)

Ch1 (PRE IN1 5pin)

Control voltage

Function

Envelope detect

Control pin

Selected playback input

Reset on rising edge

(1) DFF IN (pin 1)

• Playback input selection (head switching)

• Playback output envelope detection timing control (integrate and hold one frame)

(2) H SYNC IN (pin 11)

• Controls recording AGC detector block operation.

Control pin

Function

AGC detect

Control voltage

H

ON

L

OFF

0.0 ~ 1.2

H SYNC

(3) PB / EE / REC CTRL (pin 15)

• Playback / recording mute / recording mode switching

Control voltage

Function

Mode

Control pin

PB/EE/ REC

H

PB

ON

ON

OFF

OFF

M

REC MUTE

OFF

OFF

ON

ON

2.2 ~ 2.8

L

REC

OFF

OFF

OFF

ON

0.0 ~ 1.2

REC MUTE

AT ENVE

PRE AMP

REC AMP

(4) EP / SP CTRL (pin 21)

• Switching for the detector gain of the playback envelope detector.

EP / SP

H

L

0.0 ~ 1.2

Typ. + 6dB

Typ.

Control voltage

Control pin

Function

AT ENVE gain