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參數(shù)資料
| 型號： | LC7233N-8818 |
| 廠商： | Sanyo Electric Co.,Ltd. |
| 英文描述： | Single-Chip PLL and Controller with LCD Driver(用于電子調諧的單片微控制器（帶LCD驅動器和鎖相環(huán)電路 ）) |
| 中文描述： | 單芯片PLL和控制器LCD驅動（用于電子調諧的單片微控制器（帶液晶顯示驅動器和鎖相環(huán)電路）） |
| 文件頁數(shù)： | 7/36頁 |
| 文件大小： | 598K |
| 代理商： | LC7233N-8818 |
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Pin Functions
No. 4743-7/36
LC7233N-8818
Pin
Name
I/O
Allocation
Active
Function
Handling when unused
1
XIN
I
—
—
—
2
TEST2
I
—
—
—
3
PG3
I
TAPE
L
Connect directly to V
DD
.
—
4
PG2
I
SD
H
5
PG1
I
DIR
H/L
Connect directly to
V
SS
or V
DD
.
6
PG0
I
PANEL IN
L
Connect directly to V
SS
.
7
PH3
O
BEEP
(ALARM)
L
Open
8
PH2
O
AMUTE
L
Must be used.
9
PF3
O
CE
H
Must be used.
10
PF2
O
CL
H/L
Must be used.
11
PF1
O
H
Must be used.
12
PF0
I
DO
H
Must be used.
13
PE3
I
CDIN
L
Connect to V
SS
.
14
PE2
I
DKIN
L
Connect to V
DD
.
15
PE1
I
SKIN
L
Connect to V
DD
.
16
PE0
I
FF-REW
H
Connect to V
SS
.
17
PC1
O
RES
L
Open
18
PC0
O
T4
H
Open
19
PB3
O
T3
H
Open
20
PB2
O
T2
H
Open
21
PB1
O
T1
H
Open
22
PB0
O
T0
H
Open
23
PA3
I
K3
H
Open
24
PA2
I
K2
H
Open
25
PA1
I
K1
H
Open
26
PA0
I
K0
H
Open
4.5 MHz crystal oscillator connection
Ground connection
Tape input detection
Signal that reports station reception during auto tuning
Tape direction display: The “
and the “
” symbol on a low input.
” symbol is displayed on a high 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
key. When 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.
key is pressed the
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
VF
VF
Continued on next page.
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