Sanyo LC7233N-8818 Specifications

Overview
The LC7233N-8818 is a single-chip electronic tuning microcontroller that supports control of an electronic tone/volume control IC (the LC7538JMD) and handles detachable front panel products based on the LC75853E/W keyed LCD driver. It is designed for automotive use and incorporates a PLL-based receiver that can receive all major worldwide radio transmissions.
Features
• Supports detachable front panel products. System chips: LC7233N, LC75853E/W and LC7538JMD
• Supports anti-theft LED flashing and reminder to remove panel alarm functions.
• Supports control of an electronic tone/volume control IC (the LC7538JMD). Functions: bass, treble, balance, fader
• Muting function (with key, out and electronic tone controls)
• Supports two color illumination control (dual systems).
• Reduced LCD display output pin count achieved by operating at 1/3 duty and 1/3 bias drive using the LC75853E/W.
• Up to 36 stations can be stored in preset memory: 6 stations for each band (FM1, FM2, FM3, VF, MW (MW1) and LW (MW2)). Previous station function also supported.
• Auto preset memory function
• Radio monitor output: operates during tape FF/REW.
• CD function (with key, in, and out)
• Tape function (Flashing direction display supported when FF and REW signal inputs are provided.)
• Rich selection of double function keys for use with tape players
• Tape character display
• Supports use of electronic power switch.
• Twenty diode matrix settings
• Supports radio reception throughout the world.
• Supports AM stereo reception in the USA and Japan.
Package Dimensions
unit: mm
3159-QFP64E
Preliminary
Contents
1. Pin Assignment ........................................................ 2
2. Electrical Characteristics .......................................... 3
3. Radio Reception Frequencies ................................... 5
4. Key Matrix (LC75853E/W),
Diode Matrix (DIMRX) ............................................ 6
5. Pin Functions ............................................................ 7
6. Diode Matrix (DIMRX) Select ................................ 9
7. LCD Display Pattern (1/3 duty, 1/3 bias) ............... 11
8. Display Examples ................................................... 13
9. Key Functions ........................................................ 15
10. Power Connection .................................................. 26
11. State Transition Diagram ....................................... 26
12. Timing .................................................................... 28
13. Initial States ............................................................ 34
14. Tracking Point Frequency ...................................... 34
SANYO:QIP64E
72895TH (OT) No. 4743-1/36
CMOS LSI
Ordering number : EN*4743A
LC7233N-8818
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
Single-Chip PLL and Controller with
LCD Driver
[LC7233N-8818]
Pin Assignment
Specifications
Absolute Maximum Ratings at Ta = 25°C, VSS= 0 V
No. 4743-2/36
LC7233N-8818
Parameter Symbol Conditions Ratings Unit
Maximum supply voltage V
DD
max –0.3 to +6.5 V
Input voltage
V
IN
1 HOLD, STEREO, TAPE, SD, DIR, PANEL IN –0.3 to +13 V
V
IN
2 Inputs other than VIN1 –0.3 to VDD+ 0.3 V
Output voltage
V
OUT
1 BEEP, AMUTE, AOUT –0.3 to +15 V
V
OUT
2 Output other than V
OUT
1 –0.3 to VDD+ 0.3 V
I
OUT
1 BEEP, AMUTE 0 to 5 mA
I
OUT
2
CE, CLK, DI, DO (LC75853E/W), CDIN, DKIN, SKIN,
0 to 3 mA
Output current FF-REW
I
OUT
3 T0, T1, T2, T3, T4, RES 0 to 1 mA
I
OUT
4 AOUT 0 to 2 mA Allowable power dissipation Pd max Ta = –40 to +85°C 400 mW Operating temperature Topr –40 to +85 °C Storage temperature Tstg –45 to +125 °C
Allowable Operating Ranges at Ta = –40 to +85°C, VDD= 3.5 to 5.5 V
Electrical Characteristics for the Allowable Operating Ranges
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LC7233N-8818
Parameter Symbol Conditions
Ratings
Unit
min typ max
V
DD
1 CPU and PLL operation 4.5 5.5 V
Supply voltage V
DD
2 CPU operation 3.5 5.5 V
V
DD
3 Memory retained 1.3 5.5 V
V
IH
1 TAPE, SD, DIR, PANEL IN 0.7 V
DD
8.0 V
V
IH
2 HOLD 0.8 V
DD
8.0 V
Input high level voltage V
IH
3 STEREO 2.5 8.0 V
V
IH
4 K0, K1, K2, K3 0.6 V
DD
V
DD
V
V
IH
5 DO (LC75853E/W), CDIN, DKIN, SKIN, FF-REW 0.7 V
DD
V
DD
V
V
IL
1 TAPE, SD, DIR, PANEL IN 0 0.3 V
DD
V
V
IL
2 HOLD 0 0.4 V
DD
V
Input low level voltage V
IL
3 STEREO 0 1.3 V
V
IL
4 K0, K1, K2, K3 0 0.2 V
DD
V
V
IL
5 DO (LC75853E/W), CDIN, DKIN, SKIN, FF-REW 0 0.3 V
DD
V
F
IN
1 XIN 4.0 4.5 5.0 MHz
Input frequency
F
IN
2 FMIN:VIN2, VDD1 10 130 MHz
F
IN
3 AMIN (LW, MW):VIN3, VDD1 0.5 10 MHz
F
IN
4 HCTR:VIN4, VDD1 0.4 12 MHz
V
IN
1 XIN 0.50 1.5 Vrms
Input amplitude
V
IN
2 FMIN 0.10 1.5 Vrms
V
IN
3 AMIN 0.10 1.5 Vrms
V
IN
4 HCTR 0.10 1.5 Vrms
Parameter Symbol Conditions
Ratings
Unit
min typ max
Power down detection voltage V
DET
2.7 3.0 3.3 V
I
IH
1
HOLD, TAPE, SD, DIR, PANEL IN, STEREO:
3.0 µA
VI = 5.5 V
I
IH
2 XIN: VI= VDD= 5.0 V 2.0 5.0 15 µA
Input high level current
I
IH
3 FMIN, AMIN, HCTR: VI= VDD= 5.0 V 4.0 10 30 µA
I
IH
4 K0, K1, K2, K3: VI= VDD= 5.0 V 50 µA
I
IH
5
CDIN, DKIN, SKIN, FF-REW, DO (LC75853E/W):
3.0 µA
V
I
= VDD= 5.0 V
I
IH
6 AIN: VI= V
DD
0.01 10 nA
I
IL
1 HOLD, TAPE, SD, DIR, PANEL IN: VI= V
SS
3.0 µA
I
IL
2 XIN: VI= V
SS
2.0 5.0 15 µA
Input low level current
I
IL
3 FMIN, AMIN, HCTR: VI= V
SS
4.0 10 30 µA
I
IL
4
CDIN, DKIN, SKIN, FF-REW, DO (LC75853E/W):
30 µA
V
I
= V
SS
IIL5 AIN: VI= V
SS
0.01 10 nA
Input floating voltage V
IF
K0, K1, K2, K3 0.05 V
DD
V
Pull-down resistance R
PD
K0, K1, K2, K3: VDD= 5 V 75 100 200 k
I
OFFH
1 EO: VO= V
DD
0.01 10 nA
I
OFFH
2
T0, T1, T2, T3, T4, RES, CDIN, DKIN, SKIN,
3.0 µA
FF-REW, DO (LC75853E/W): V
O
= V
DD
Output off leakage current I
OFFH
3 BEEP, AMUTE: VO= 13 V 5.0 µA
I
OFFL
1 EO: VO= V
SS
0.01 10 nA
I
OFFL
2
T0, T1, T2, T3, T4, RES, CDIN, DKIN, SKIN,
3.0 µA
FF-REW, DO (LC75853E/W): V
O
= V
SS
Continued on next page.
Continued from preceding page.
Note: *K0, K1, K2, K3, TAPE, SD, DIR, PANEL IN, DO (LC75853E/W)
All ports other than those specified above are left open.
Figure 1 IDD2 in Hold Mode
No. 4743-4/36
LC7233N-8818
Parameter Symbol Conditions
Ratings
Unit
min typ max
V
OH
1 T0, T1, T2, T3, T4, RES: IO= –1 mA VDD– 2.0 VDD– 1.0 VDD– 0.5 V
V
OH
2 CE, CLK, DI (LC75853E/W): IO= –1 mA VDD– 1.0 V
V
OH
3 EO: IO= 500 µA VDD– 1.0 V
V
OH
4 XOUT: IO= 200 µA VDD– 1.0 V
Output high level voltage BAND1, BAND2, MODE, FMLOW, CE, CLK,
DI (LC7538JMD), LOUD, IFCNT, MO/ST, LOC,
V
OH
5 POWER, CDOUT, NR1, NR2, MTL, APS, VDD– 1.0 V
MUTE, DKOUT, LEDFLSH, T5, T6, T7: I
O
= –0.1 mA
V
OH
6 COM1, COM2: IO= 25 µA VDD– 0.75 VDD– 0.5 VDD– 0.3 V
V
OL
1 T0, T1, T2, T3, T4, RES: IO= 50 µA 0.5 1.0 2.0 V
V
OL
2 CE, CLK, DI (LC75853E/W): IO= 1 mA 1.0 V
V
OL
3 EO: IO= 500 µA 1.0 V
V
OL
4 XOUT: IO= 200 µA 1.0 V
BAND1, BAND2, MODE, FMLOW, CE, CLK,
Output low level voltage DI (LC7538JMD), LOUD, IFCNT, MO/ST, LOC,
V
OL
5 POWER, CDOUT, NR1, NR2, MTL, APS, 1.0 V
MUTE, DKOUT, LEDFLSH, T5, T6, T7: I
O
= 0.1 mA
V
OL
6 AOUT: IO= 0.5 mA, AIN = 1.3 V 0.5 V
V
OL
7 COM1, COM2: IO= 25 µA 0.3 0.5 0.75 V
V
OL
8 BEEP, AMUTE: IO= 5 mA 0.75 (150 ) 2.0 (400 ) V
Output intermediate level voltage V
M
COM1, COM2: VDD= 5 V, IO= 20 µA 2.0 2.5 3.0 V
I
DD
1 VDD1: FIN2 = 130 MHz 15 20 mA
I
DD
2 VDD2: (Hold mode: see Figure 1.) 1.5 mA
Supply current I
DD
3
V
DD
= 5.5 V, oscillator stopped, Ta = 25°C
5 µA
(Backup mode: see Figure 2.)
I
DD
4
V
DD
= 2.5 V, oscillator stopped, Ta = 25°C
1 µA
(Backup mode: see Figure 2.)
Note: All ports other than those specified above are left open.
Figure 2 IDD3 and IDD4 in Backup Mode
Radio Reception Frequencies
Note: 1. In Europe, the diode matrix SHIFT setting is used for IF selection.
2. The step size “(9)” refers to the step size in auto-tuning mode when IF counting is not performed.
No. 4743-5/36
LC7233N-8818
Frequency range Fref. Step
IF IF count
Diode matrix
Area Band
(FM, SW: MHz AM: kHz) (kHz) (kHz)
FM (MHz) tolerance
(1: On 0: Off)
AM (kHz) (kHz)
B2 B1 B0
LW2 LW1
SHIFT
FM a 87.5 — 107.9 25 200 10.7 ±10
0 0 0 0 0 0
U.S.A
MW a 530 — 1720 10 10 450 ±3
FM b 87.5 — 108.0 25 100 10.7 ±10
0 0 0 1 0 0
MW a 530 — 1720 10 10 450 ±3
Southeast FM c 87.5 — 108.0 25 50 10.7 ±10
0 0 0 1 1 1
Asia MW h 531 — 1629 9 9 450 ±3
FM c
87.5 — 108.0 25 50 10.7 ±10
MW c
531 — 1620 9 9 450/459 ±3
0 1 0
0 0
0/1
LW a
153 — 279 1 1 (9)
10.7 ±0.6 0 1
450/459
FM d
87.5 — 108.0 12.5 25 10.7 ±10
MW c
531 — 1620 9 9 450/459 ±3
1 0 0
0 0
0/1
LW a
153 — 279 1 1 (9)
10.7 ±0.6 0 1
Europe
450/459
FM c
87.5 — 108.0 25 50 10.7 ±10
MW c
531 — 1620 9 9 450/459 ±3
0 1 0
0 0
0/1
LW b
146 — 290 1 1 (9)
10.7 ±0.6 1 0
450/459
FM d
87.5 — 108.0 12.5 25 10.7 ±10
MW c
531 — 1620 9 9 450/459 ±3
1 0 0
0 0
0/1
LW b
146 — 290 1 1 (9)
10.7 ±0.6 1 0
450/459
Japan
FM e 76.0 — 90.0 25 100 –10.7 ±10
1 0 1 0 0 0
MW e 522 — 1629 9 9 450 ±3
Saudi Arabia
FM b 87.5 — 108.0 25 100 10.7 ±10
1 0 1 0 0 1
MW f 531 — 1602 9 9 450 ±3
South Africa
FM f 87.5 — 108.0 25 100 –10.7 ±10
1 0 1 0 1 0
MW g 531 — 1602 9 9 450 ±3
65.0 — 74.0 5 30 10.7 ±10
East Europe
FM g
87.5 — 108.0 25 50 10.7 ±10 1 0 1 1 0 0
MW c
531 — 1620 9 9 450 ±3
Key Matrix (LC75853E/W)
Diode Matrix (DIMRX)
Momentary switch
Diode matrix
No. 4743-6/36
LC7233N-8818
IN
OUT
KI1 KI2 KI3 KI4 KI5
KS1
M1 M2 M3
M4 M5
MTL DNR APS KS2 M6 LOUD/RMON MO/ST UP/T-UP DOWN/T-DOWN KS3 BAND/ILL1 POWER V-SEL V-UP V-DOWN KS4 PS/AMEM VF SCAN UP SEEK UP SEEK DOWN KS5 LOC DISPLAY CD MUTE
K0 K1 K2 K3
T0 B0 B1 B2 IFSHIFT
T1 FMB0 FMB1 LW1 LW2
T2 IF COUNT0 IF COUNT1 COLON CLOCK
T3 DOUBLE FUNCTION 0 DOUBLE FUNCTION 1 DOUBLE FUNCTION 2 FM ONLY
T4 FADER EVR ON/OFF VF AUTORETUNE POWER OFF
CLOCK ON
T5 NR C PRIORITY POWER SW VF SELECT
T6 AUTO500 CD SELECT RMON FF/REW AM STEREO SEL
T7 –20 dB ACC OFF MW2 SEL LED FLASH SEL
ALARM SEL
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 VDD.
6 PG0 I PANEL IN L Connect directly to V
SS
.
7 PH3 O
BEEP
L Open
(ALARM)
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 DI 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 VDD.
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 “ ” 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 key. When the key is pressed the LC7233N-8818 starts a search for a low SKIN signal. The LC7233N­8818 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
VF
VF
Continued on next page.
Continued from preceding page.
No. 4743-8/36
LC7233N-8818
Pin Name I/O Allocation Active Function Handling when unused 27 S23 O T5 H Open 28 S22 O T6 H Open 29 S21 O T7 H Open
30 S20 O LEDFLSH H Open
31 S19 O DKOUT H Open
32 S18 O MUTE H Open
33 S17 O APS H Open
34 S16 O MTL H Open
35 S15 O NR2 H Open
36 S14 O NR1 H Open
37 S13 O CDOUT H Open
38 S12 O POWER H Open
39 S11 O LOC H Open
40 S10 O MO/ST H Open
41 S9 O IFCNT H Open
42 S8 O LOUD H Open
43 S7 O DI H Open 44 S6 O CL H/L Open 45 S5 O CE H Open
46 S4 O FMLOW H Open
47 S3 O MODE H/L Open
48 S2 O BAND2 H/L
Must be used.
49 S1 O BAND1 H/L
50 COM2 O
51 COM1 O
Diode scan out Diode scan out Diode scan out Outputs a high level for 0.25 second and a low level for 0.75 second
when PANEL IN goes high. However, the LC7233N-8818 only performs this operation when the diode matrix LED FLASH setting is
0. Outputs a high level when DKIN goes low. Inverted by the mute key. When high, the volume level display flashes
at a 1 Hz rate. Valid when HOLD is high and main power is on. In tape mode, outputs a high level when the APS display is lit, and a
low level when that display is off. Valid when HOLD is high and main power is on.
In tape mode, outputs a high level when the MTL display is lit, and a low level when that display is off. Valid when HOLD is high and main power is on.
In tape mode when the diode matrix NR setting is 1 (i.e., when DNR­C is selected), outputs a high level when the DNR display and the C in the preset CH digit are lit, and a low level when that display is off. Valid when HOLD is high and main power is on.
In tape mode, outputs a high level when the DNR display and the B in the preset CH digit are lit, and a low level when that display is off. Valid when HOLD is high and main power is on.
CD source switch (See the CDIN pin description.) Outputs a high level when the power is on (when the diode matrix
POWER SW setting is 1 and the key is on). Outputs low when power is off.
In radio mode when the LOC display is lit, outputs a high level only during seek or scan when a seek or scan is started. Outputs low when display is off. Valid when HOLD is high and main power is on.
In radio mode during FM reception (including VF and radio monitor), outputs a low level when the ST display is lit, and a high level when that display is off. However, note that this output is enabled for the US and Japanese MW band when the diode matrix AM ST SEL setting is
0. Outputs a low level in other modes, i.e., tape or CD mode, and when HOLD is low (clock enabled).
This signal switches the IF counter buffer on and off. Outputs a high level only when there is an SD during auto search, otherwise outputs a low level.
Outputs a high level when the LOUD display is lit, and a low level when that display is off. Valid when HOLD is high and main power is on.
Connected to the LC7538JMD DATA pin. Connected to the LC7538JMD CLOCK pin. Connected to the LC7538JMD CE pin. Outputs a high level when the FM band is from 64.0 to 74.0 MHz, and
a low level when the FM band is from 87.5 to 108.0 MHz. Outputs a high level in radio mode, including when DK is on, and
outputs a low level in tape and CD modes. Outputs a low level when HOLD is low and PANEL IN is high.
These signals change as shown in the table below when the band key is pressed.
Note: 0 = Low, 1 = High
These pins are left open in normal operation.
POWER
BAND BAND1 BAND2 Note
MW 0 0
Including tape and
CD modes LW 0 1 FM 1 0
VF 1 1
Including times when
DK is on
Continued on next page.
Continued from preceding page.
Diode Matrix (DIMRX) Select
0: without diode, 1: with diode
No. 4743-9/36
LC7233N-8818
Pin Name I/O Allocation Active Function Handling when unused
52 HOLD I HOLD L Must be used.
53 ADI I V
SS
Connect directly to VSS.
54 HCTR I HCTR
Connect directly to VSS.
55 SNS I STEREO L Connect directly to V
DD
.
56 V
DD
57 FMIN I Connect directly to V
SS
.
58 AMIN I Connect directly to VSS. 59 V
SS
— 60 EO O Must be used. 61 AIN I Connect directly to V
SS
.
62 AOUT O Connect directly to V
SS
. 63 TEST1 I — 64 XOUT O
Detects the external power switch on/off state. When HOLD goes from high to low:
• When the clock is enabled: The oscillator is not stopped and the clock continues to count. (Hold mode; I
DD
= 1.5 mA typ)
• When the clock is disabled (when the diode matrix LED FLASH setting is 1): The oscillator is stopped and the LC7233N-8818 enters low power mode. (Backup mode; I
DD
= 5 µA max)
Connected to V
SS
.
Inputs the FMIF and AMIF signals. Input an AC coupled signal of 100 mV rms or over. See the description of the diode matrix IFCOUNT0 and IFCOUNT1 settings. Tolerance: FM ±10 kHz, MW ±3 Hz, LW ± 0.6 kHz
When HOLD is high, the display is turned on 500 ms after a low level input in radio mode (FM or VF) only. Display starts 500 ms after HOLD goes from low to high. However, this function is also enabled in MW mode in products for the US and Japanese markets when the diode matrix AM ST SEL setting is 1.
+5 V input FM local oscillator input
Input an AC coupled signal of 100 mVrms or over. AM local oscillator input
Input an AC coupled signal of 100 mVrms or over. Connected to ground. Phase comparator output: connected to the LPF input. LPF amplifier input LPF amplifier output Connected to ground.
4.5 MHz crystal oscillator connection
Diode matrix On/
Function
name off
Clock function enabled.
0 12 Hr: USA, Japan, Saudi Arabia, South Africa, Southeast Asia
CLOCK
24 Hr: Europe, East Europe 1 Clock function disabled. 0 CD function disabled. CDIN disabled. The CDOUT pin outputs a low level. Connect CDIN to VDD.
CD SELECT
1
CD function enabled. When CDIN is low CDOUT will be high, and when CDIN is high CDOUT will be low. The CD key is also
enabled. (See the item on the CDIN pin.)
B0 B1 B2
See the reception frequency table.
IFSHIFT
LW1 LW2
FMB1 FMB0 Number of preset FM stations
FMB0
0 0 FM1, FM2, FM3 (18 stations)
FMB1
0 1 FM1, FM2 (12 stations) 1 0 FM1 (6 stations) 1 1 Illegal value 0 The FM, MW, and LW bands are enabled.
FM ONLY
1 Only the FM band is enabled. The band key is disabled. The number of FM bands depends on the diode matrix FMB0 and FMB1
settings.
Continued on next page.
Continued from preceding page.
0: without diode, 1: with diode
Note: * The seek for a manual up or down jumps in 9 kHz steps.
No. 4743-10/36
LC7233N-8818
Diode matrix On/
Function
name off
0 DNR C is disabled. The NR key switches noise reduction between off and NR B. DNR is displayed.
DNR C is enabled. The NR key switches noise reduction from off to NR B to NR C to off.
NR C
1
The mode is displayed in digit 5.
POWER SW
0 The power is turned on and off using the HOLD pin. See section 9, "Power Connection Examples." 1 The power is turned on and off using the power key. See section 9, "Power Connection Examples."
PRIORITY
0 Clock display takes priority.
When the clock function is enabled (the diode matrix CLOCK setting is 0).
1 Frequency, tape, or CD display takes priority.
IFCOUNT1 IFCOUNT0
Enabled/
HCTR pin Note
disabled
IFCOUNT0
0 0 Enabled FMIF/AMIF For use with FMIF/AMIF single pin tuner ICs.
IFCOUNT1
0 1 Enabled FMIF only 1 0 Enabled AMIF only 1 1 Disabled Connected to GND. LW seek is performed in 9 kHz steps.*
COLON
0 The clock colon display is always lit. 1 The clock colon display flashes at 1 Hz.
VF
0 In VF mode, the LC7233N-8818 retunes if SKIN is high continuously for 25 seconds. However, note that an alarm is output.
AUTORETUNE
1 In VF mode, the LC7233N-8818 does not retune even if SKIN is high continuously for 25 seconds. Note that no alarm is output.
VF SELECT
0 VF mode disabled. 1 VF mode enabled.
POWER OFF
0 The clock is not displayed when the main power is turned off.
CLOCK ON
1 The clock is always displayed when the main power is turned off.
EVR ON/OFF
0 An electronic volume function is built in. 1 An electronic volume function is not built in. Nor is it displayed. 0 A fader function is built in. The V-SEL key switches the fader as follows.
FADER
1 No fader function is built in.
M1, M2, and M3 can be independently selected with the radio mode and tape mode double function keys as shown in the table below. A “—” entry indicates that there is no double function.
DOUBLE FUNCTION 0 FUNCTION 1 FUNCTION 2
0
The LC7233N-8818 switches to radio monitor mode regardless of the state of the radio monitor key when a high level is input to
RMON
the FF-REW pin. The RMON display flashes at a 1 Hz rate.
FF/REW
1
The LC7233N-8818 switches to radio monitor mode when the RMON key is on, the RMON display is lit, and a high level is input to the FF-REW pin. The RMON display flashes at a 1 Hz rate. Invalid when the RMON display is off.
0 The UP/DOWN keys perform manual up/down tuning operations.
AUTO500
1
The UP/DOWN keys function as T-UP/T-DOWN keys. If one of these keys is pressed for less than 500 ms, a manual tuning operation is performed, and if pressed for more than 500 ms, a seek tuning operation is performed.
KEY on Off NR B NR C
Display (digit 1) Off ‘DNR’ ‘DNR’
Pin
NR1 L H L NR2 L L H
FUNCTION2 FUNCTION1 FUNCTION0 M1 M2 M3
0 0 0 — 0 0 1 MTL — 0 1 0 NR — 0 1 1 MTL NR — 1 0 0 APS — 1 0 1 MTL APS — 1 1 0 NR APS — 1 1 1 MTL NR APS
Continued on next page.
VOLUME BASS TREBLE BALANCE FADER
VOLUME BASS TREBLE BALANCE
Continued from preceding page.
0: without diode, 1: with diode
LCD Display Pattern (1/3 Duty, 1/3 Bias)
1. Digit Position
No. 4743-11/36
LC7233N-8818
Diode matrix On/
Function
name off
AM ST SEL
0 The MO/ST key is disabled in the MW band when Japan or USA is selected. 1 The MO/ST key is enabled in the MW band when Japan or USA is selected. 0 When the MUTE key is pressed and the MUTE output goes high, a –79 dB data item is sent to the electronic volume control IC.
–20 dB
1
When the MUTE key is pressed and the MUTE output goes high, a data item for only –20 dB less than the current volume is sent to the electronic volume control IC.
0
When the LC7233N-8818 enters the ACC OFF state (when HOLD is low) a panel removal reminder alarm is not output from the ALARM pin.
When the LC7233N-8818 enters the ACC OFF state (HOLD is low) a panel removal reminder alarm will be output from the ALARM pin. The alarm signal frequency is about 4.4 kHz, and lasts for about 20 seconds.
ACC OFF
ALARM SEL
1
0 There is no MW2 band, and only the MW band is displayed.
MW2 SEL
1
When there is no LW band, the MW2 band is added, and these bands are referred to as MW1 and MW2. The display for MW1 is “MW I”, and the display for MW2 is “MW II”.
0
A pulse (high for 250 ms, low for 750 ms) is output from the LEDFLSH pin in the ACC OFF state (HOLD is low) when PANEL IN
LED FLASH
is high.
1
The LEDFLSH pin remains low when the LC7233N-8818 enters the ACC OFF state (when HOLD goes low) and PANEL IN is high. At this time the LC7233N-8818 enters backup mode if the clock function is disabled.
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