LC7233N-8818 Ver la hoja de datos (PDF) - SANYO -> Panasonic
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LC7233N-8818 Datasheet PDF : 36 Pages
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LC7233N-8818
Pin Functions
Pin
Name
1
XIN
2
TEST2
3
PG3
4
PG2
5
PG1
6
PG0
7
PH3
8
PH2
9
PF3
10
PF2
11
PF1
12
PF0
13
PE3
14
PE2
15
PE1
16
PE0
17
PC1
18
PC0
19
PB3
20
PB2
21
PB1
22
PB0
23
PA3
24
PA2
25
PA1
26
PA0
I/O Allocation
I
—
I
—
I
TAPE
I
SD
I
DIR
I
PANEL IN
BEEP
O
(ALARM)
O
AMUTE
O
CE
O
CL
O
DI
I
DO
I
CDIN
I
DKIN
I
SKIN
I
FF-REW
O
RES
O
T4
O
T3
O
T2
O
T1
O
T0
I
K3
I
K2
I
K1
I
K0
Active
—
—
L
H
H/L
L
L
L
H
H/L
H
H
L
L
L
H
L
H
H
H
H
H
H
H
H
H
Function
4.5 MHz crystal oscillator connection
Ground connection
Tape input detection
Signal that reports station reception during auto tuning
Tape direction display: The “ ” symbol is displayed on a high input,
and the “ ” symbol on a low input.
Detachable panel in/out detection: low indicates in, high indicates out.
A 250 ms chatter rejection period is provided.
Outputs a 50 ms 4.4 kHz pulse when a key is pressed.
In VF mode, if the SKIN signal was high for 25 seconds (checked at
approximately 25 ms intervals), this pin outputs an alarm signal and
the LC7233N-8818 starts an auto up search for a low SKIN signal
when a diode matrix VF SELECT setting of 0 is used. Since this pin
uses an open drain output circuit, connect a pull-up resistor to this
pin.
Audio mute out. When low, the LC7233N-8818 sends a “–79 dB” data
message to the LC7538JMD. This pin is low when HOLD is low (clock
enabled).
Connect a pull-up resistor to this pin since it uses an open drain output.
Connect to the LC75853E/W CE pin.
Connect to the LC75853E/W CLOCK pin.
Connect to the LC75853E/W DI pin.
Connect to the LC75853E/W DO pin.
When this pin goes low, the LC7233N-8818 turns on the CD display,
switches to CD mode, and sets the CDOUT pin high. If the CD key is
pressed again in this state, the LC7233N-8818 turns off the CD
display and sets CDOUT low. Similarly, if the CDIN pin goes from low
to high, the LC7233N-8818 turns off the CD display and sets CDOUT
low. Note that the CD state cannot be switched with only the CD key
if CDIN is high.
The CD has the highest priority, with the total priority order being:
CD > TAPE > RADIO.
In products for the European market, when the LC7233N-8818 is in
VF mode and either tape or CD mode, the LC7233N-8818 will switch
to radio mode allowing ARI broadcasts to be received if a low level is
input to this pin (more precisely, if this signal is low three times in a
row at 25 ms intervals). Also, after an SK SEEK, 250 ms after SKIN is
determined to be low the LC7233N-8818 performs a DK
determination.
If this signal goes low in FM mode with the diode matrix VF SELECT
setting set to 1, the SK display is turned on. This does not depend on
the on/off state of the VF key. When the VF key is pressed the
LC7233N-8818 starts a search for a low SKIN signal. The LC7233N-
8818 checks the signal about 375 to 500 ms after an SD is
determined to exist, and if low, that channel is held. Thereafter, if a
high level continues for 25 seconds (checked every 25 ms) the
LC7233N-8818 starts an auto-retune operation. The LC7233N-8818
checks the SKIN signals in M1 to M6, skipping over channels with
high SKIN signals and stopping at the first channel with a low SKIN
signal.
If this pin goes high when the LC7233N-8818 is in tape mode, the
LC7233N-8818 switches to radio monitor mode. Also at this time, the
currently displayed scan display flashes at a 1 Hz rate.
The LC7233N-8818 remains in tape mode while this pin is low.
Connected to the LC75853E/W RES pin
Diode scan out
Diode scan out
Diode scan out
Diode scan out
Diode scan out
Diode scan in
Diode scan in
Diode scan in
Diode scan in
Handling when unused
—
—
Connect directly to VDD.
—
Connect directly to
VSS or VDD.
Connect directly to VSS.
Open
Must be used.
Must be used.
Must be used.
Must be used.
Must be used.
Connect to VSS.
Connect to VDD.
Connect to VDD.
Connect to VSS.
Open
Open
Open
Open
Open
Open
Open
Open
Open
Open
Continued on next page.
No. 4743-7/36
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