BA7182 데이터 시트보기 (PDF) - ROHM Semiconductor
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BA7182 Datasheet PDF : 9 Pages
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Video ICs
•Control mode tables
(1) DFF IN (pin 1)
• Playback input selection (head switching)
• Playback output envelope detection timing control (integrate and hold one frame)
Control pin
DFF IN
H
L
Function
Selected playback input
Envelope detect
Ch2 (PRE IN2 7pin)
Reset on rising edge
Ch1 (PRE IN1 5pin)
—
Control voltage
VCTRL1 [V]
3.5 ~ VCC
0.0 ~ 1.2
(2) H SYNC IN (pin 11)
• Controls recording AGC detector block operation.
Control pin
H SYNC
H
L
Function
AGC detect
ON
OFF
Control voltage
VCTRL11 [V]
2.7 ~ VCC
0.0 ~ 1.2
(3) PB / EE / REC CTRL (pin 15)
• Playback / recording mute / recording mode switching
Control pin
PB / EE / REC
Mode
Function
Control voltage
PRE AMP AT ENVE REC MUTE REC AMP VCTRL15 [V]
H
PB
ON
ON
OFF
OFF
3.8 ~ VCC
M
REC MUTE
OFF
OFF
ON
ON
2.2 ~ 2.8
L
REC
OFF
OFF
OFF
ON
0.0 ~ 1.2
∗ Pin 15 is pulled up to VCC via a 33kΩ resistor.
(4) EP / SP CTRL (pin 21)
• Switching for the detector gain of the playback envelope detector.
Control pin
Function
EP / SP
AT ENVE gain
H
Typ. + 6dB
L
Typ.
∗ Pin 21 is pulled up to VCC via a 50kΩ resistor.
Control voltage
VCTRL21 [V]
3.5 ~ VCC
0.0 ~ 1.2
BA7182AS
7
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