LA7156 데이터 시트보기 (PDF) - SANYO -> Panasonic
부품명
상세내역
제조사
LA7156 Datasheet PDF : 8 Pages
| |||
LA7156
Switch Logic Values Table
The LA7156 provides the following switching control with control of pin 20.
1. Normal mode (when pin 20 is high)
In this mode, the LA7156 functions, including switching, FSS output and muting, can be controlled from the six bits
of serial data transferred from the microprocessor. However, note that the video and audio system switch operate at
the same time in this mode.
DATA1
Switch state
Note
DATA4
Switch state
H
L
DATA2 DATA3
H
L
A.SW1-A, V.SW1-A
A.SW1-B, V.SW1-B
Switch state
A.SW2-A, V.SW2-A
1, 2
1, 2
Note
1, 2
H
L
DATA5
H
A.SW3-A, V.SW3-A, pin 7 high
A.SW3-B, V.SW3-B, pin 7 low
FSS output state
Output high
L
L
A.SW2-B, V.SW2-B
—
H
A.SW2-C, V.SW2-C
1, 2
L
Output low
1, 2
DATA6
Muted state
H
Muted
L
Mute released
Note: 1. All the audio switch and the video SW3 outputs are forcibly muted when DATA6 is high or in muting mode.
2. A.SW indicates the audio system switches and V.SW indicates the video system switches.
Note
1, 2
1, 2
Note
Note
2. Preset mode (when pin 20 is middle or low)
This mode uses the LA7156 internally set up logic and the six bits of data are allocated to the VCR operating states
to allow the switch states to be changed.
Serial Data
External Input Data
DATA No.
D1
D2
D3
D4
D5
D6
Item
Power on/off
VCR/TV
Pay CH/Normal CH
EXT/Tuner
PB/EE
Mute on/off
H
On
VCR
Pay
EXT
PB
On
L
Off
TV
Normal
Tuner
EE
Off
Pin No.
P2
Item
Decoder in
H
Scramble
L
Normal
Truth Table
Pin 20: Open or Middle
D1
D2
D3
D4
D5
P2
L
—
—
—
—
H
L
—
—
—
—
L
H
L
—
L
L
H
H
L
—
L
L
L
H
H
—
L
L
H
H
H
—
L
L
L
H
L
—
H
L
H
H
L
—
H
L
L
H
H
—
H
L
H
H
H
—
H
L
L
H
—
—
—
H
H
H
—
—
—
H
L
Note: The previous state is retained even if another switch is changed.
A.V.SW1
A
A
A
A
A
A
A
A
A
A
A
A
A.V.SW2
C
C
A
C
A
C
B
B
B
B
*
*
A.V.SW3
A
A
A
A
A
A
A
A
A
A
A
A
FSS out
L
L
L
L
H
H
L
L
H
H
H
H
Pin 7 out
H
H
H
H
H
H
H
H
H
H
H
H
No. 4702-4/8
Share Link: 