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Ordering number : *EN4934A
CMOS LSI
LC72323-XXXX
Provisional Development Specifications
Preliminary Overview
The LC72323-XXXX is a single-chip car audio system electronic tuning controller that supports detachable function block systems. This product supports reception in all areas of the world and include PLL, LCD driver and electronic volume/tone control support circuits on chip.
Package Dimensions
unit: mm 3174-QFP80E
[LC72323-XXXX]
Features
* Support for reception of the European FM, MW and LW bands and the FM and AM bands used in the US, Australia, the Middle and Near East and South America * Support for electronic volume/tone controls (bass, treble, balance and fader) using the LC75371M * VF seek and auto retune functions (Europe) * Support for IF counting techniques in all bands * Automatic memory function in station strength order (FM band) * Loudness control * CD functions -- Key inputs -- CD indicator display function * Tape functions -- Tape indicator display function -- Dolby, APSS and metal tape controls * Clock function with 24-hour display for Europe and 12-hour display for other reception areas * Single 5 V power supply * Package: QFP80E (QIP80E) * Telephone mute function * LED blinking function
SANYO: QIP80E
This LSI can easily use CCB that is SANYO's original bus format.
* CCB is a trademark of SANYO ELECTRIC CO., LTD. * CCB is SANYO's original bus format and all the bus addresses are controlled by SANYO.
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN
13097HA (OT)/73195TH (OT) No. 4934-1/27
LC72323-XXXX
Specifications
Absolute Maximum Ratings at Ta = 25C, VSS = 0 V
Parameter Maximum supply voltage Input voltage Symbol VDD max VIN (1) VIN (2) VOUT (1) VOUT (2) IOUT (1) Output current IOUT (2) IOUT (3) Allowable power dissipation Operating temperature Storage temperature Note: * Reference value Pd max Topr Tstg HOLD, TELIN, RES, SNS, ADI, SD, ST, SK, DK Inputs other than VIN (1) BEEP, BAND2, BAND1, POWER Outputs other than VOUT (1) AMUTE, LEDFL, DI/KS9, CLK/KS8, BEEP, BAND2, BAND1, POWER DOLBY, METAL, APSS, LOUDNESS, LOCAL, STEREO KS0, KS1, KS2, KS3, KS4, KS5, KS6, CE/KS7 Ta = -40 to +85C Conditions Ratings -0.3 to +6.5 -0.3 to +13 -0.3 to VDD + 0.3 -0.3 to +15 -0.3 to VDD + 0.3 0 to 5 0 to 3 0 to 1 300* -40 to +85 -45 to +125 Unit V V V V V mA mA mA mW C C
Output voltage
Allowable Operating Ranges at Ta = -40 to +85C, VDD = 3.5 to 5.5 V
Parameter Symbol VDD (1) Supply voltage VDD (2) VDD (3) VIH (1) VIH (2) Input high level voltage VIH (3) VIH (4) VIH (5) VIL (1) VIL (2) Input low level voltage VIL (3) VIL (4) VIL (5) VIL (6) FIN (1) FIN (2) Input frequency FIN (3) FIN (4) FIN (5) VIN (1) Input amplitude VIN (2) VIN (3) VIN (4) Input voltage range VIN (5) Conditions With the CPU and PLL operating CPU operating Memory retention SK, DK, SD, ST RES, INT, HOLD SNS K0, K1, K2, K3 TAPE, TAPERUN SK, DK, SD, ST RES, INT SNS K0, K1, K2, K3 TAPE, TAPERUN HOLD XIN FM OSC, VIN (2), VDD (1) AM OSC, VIN (3), VDD (1) FMIF, VIN (4), VDD (1) AMIF, VIN (4), VDD (1) XIN FM OSC AM OSC FMIF, AMIF ADI Ratings min 4.5 3.5 1.3 0.7 VDD 0.8 VDD 2.5 0.6 VDD 0.7 VDD 0 0 0 0 0 0 4.0 10 0.5 0.4 100 0.50 0.10 0.10 0.10 0 4.5 typ max 5.5 5.5 5.5 8.0 8.0 8.0 VDD VDD 0.3 VDD 0.2 VDD 1.3 0.2 VDD 0.3 VDD 0.4 VDD 5.0 130 10 12 500 1.5 1.5 1.5 1.5 VDD Unit V V V V V V V V V V V V V V MHz MHz MHz MHz kHz Vrms Vrms Vrms Vrms V
No. 4934-2/27
LC72323-XXXX Electrical Characteristics for the Allowable Operating Ranges
Parameter Power down detection voltage Symbol VDET IIH (1) Input high level current IIH (2) IIH (3) IIH (4) IIH (5) IIL (1) Input low level current IIL (2) IIL (3) IIL (4) Input floating voltage Pull-down resistance VIF RPD IOFFH (1) Output off leakage current IOFFH (2) IOFFH (3) IOFFL (1) Output off leakage current IOFFL (2) VOH (1) VOH (2) Output high level voltage VOH (3) VOH (4) VOH (5) VOH (6) VOH (7) VOL (1) VOL (2) VOL (3) VOL (4) Output low level voltage VOL (5) VOL (6) VOL (7) VOL (8) Output mid-level voltage VM IDD (1) IDD (2) Current drain IDD (3) IDD (4) TELIN, HOLD, RES, ADI, SNS, SK, DK, SD, ST: VI = 5.5 V XIN: VI = VDD = 5.0 V FM OSC, AM OSC, FMIF, AMIF: VI = VDD = 5.0 V K0, K1, K2, K3: VI = VDD = 5.0 V TAPE, TAPERUN: VI = VDD TELIN, HOLD, RES, ADI, SNS, SK, DK, SD, ST: VI = VSS XIN: VI = VSS FM OSC, AM OSC, FMIF, AMIF: VI = VSS TAPE, TAPERUN: VI = VSS K0, K1, K2, K3 K0, K1, K2, K3: VDD = 5 V EO1, EO2: VO = VDD KS0 to KS6, CE/KS7, CLK/KS8, DI/KS9, LEDFL, AMUTE, LOUDNESS, APSS, METAL, DOLBY, STEREO, LOCAL: VO = VDD BAND1, BAND2, BEEP, POWER: VO = 13 V EO1, EO2: VO = VSS KS0 to KS6, CE/KS7, CLK/KS8, DI/KS9, LEDFL, AMUTE, LOUDNESS, APSS, METAL, DOLBY, STEREO, LOCAL: VO = VSS KS0 to KS6, CE/KS7: IO = 1 mA LOUDNESS, APSS, METAL, DOLBY, STEREO, LOCAL: IO = 1 mA EO1, EO2: IO = 500 A XOUT: IO = 200 A S1 to S28: IO = 0.1 mA COM1, COM2: IO = 25 A AMUTE, LEDFL, CLK/KS8, DI/KS9: IO = 5 mA KS0 to KS6, CE/KS7: IO = 50 A LOUDNESS, APSS, METAL, DOLBY, STEREO, LOCAL: IO = 1 mA EO1, EO2: IO = 500 A XOUT: IO = 200 A S1 to S28: IO = 0.1 mA AMUTE, LEDFL, CLK/KS8, DI/KS9: IO = 5 mA COM1, COM2: IO = 25 A BAND1, BAND2, BEEP, POWER: IO = 5 mA COM1, COM2, VDD = 5 V, IO = 20 A VDD (1), FIN (2) = 130 MHz VDD (2), PLL stopped, (hold mode, Figure 1) VDD = 5.5 V, oscillator stopped, Ta = 25C (backup mode, Figure 2) VDD = 2.5 V, oscillator stopped, Ta = 25C (backup mode, Figure 2) 0.3 0.75 (150 ) 2.0 2.5 15 1.0 5 1 0.5 VDD - 2.0 VDD - 1.0 VDD - 1.0 VDD - 1.0 VDD - 1.0 VDD - 0.75 VDD - 1.0 0.5 1.0 2.0 1.0 1.0 1.0 1.0 1.0 0.75 2.0 (400 ) 3.0 20 VDD - 0.5 VDD - 0.3 VDD - 1.0 0.01 75 100 0.01 2.0 4.0 5.0 10 2.0 4.0 5.0 10 50 3.0 3.0 15 30 3.0 0.05 VDD 200 10 3.0 5.0 10 3.0 VDD - 0.5 Conditions Ratings min 2.7 typ 3.0 max 3.3 3.0 15 30 Unit V A A A A A A A A A V k nA A A nA A V V V V V V V V V V V V V V V V mA mA A A
No. 4934-3/27
LC72323-XXXX
Unit (capacitance: F)
*1: K0, K1, K2, K3, TAPE, TAPERUN Note: BEEP, BAND2, BAND1, POWER, LOCAL, STEREO, DOLBY, METAL, APSS, LOUDNESS, AMUTE, LEDFL, DI/KS9, CLK/KS8, CE/KS7, KS0 to KS6 = "Open"
Figure 1 IDD (2) in Hold Mode
Unit (capacitance: F)
Note: With all ports other than those specifically mentioned left open
Figure 2 IDD (3) in Backup Mode
No. 4934-4/27
LC72323-XXXX Pin Assignment
No. 4934-5/27
LC72323-XXXX Reception Frequencies
Area Band FM Europe 1 MW LW Europe 2 MW LW FM AM FM AM FM AM FM AM FM AM FM AM Reciving frequency 87.5 - 108.0 MHz 531 - 1602 153 - 281 531 - 1602 153 - 281 kHz kHz kHz kHz Channel spacing Auto 50 kHz 9 kHz Manual 50 kHz 9 kHz 1 kHz 9 kHz 1 kHz 50 kHz 9 kHz 200 kHz 10 kHz 200 kHz 10 kHz 100 kHz 9 kHz 100 kHz 9 kHz 100 kHz 10 kHz Reference frequency 25 kHz 9 kHz 1 kHz 9 kHz 1 kHz 25 kHz 9 kHz 25 kHz 10 kHz 25 kHz 10 kHz 25 kHz 9 kHz 25 kHz 9 kHz 25 kHz 10 kHz IF 10.7 MHz 459 kHz IF count tolerance 10 kHz 3 kHz 0.6 kHz 3 kHz 0.6 kHz 10 kHz 3 kHz 10 kHz 3 kHz 10 kHz 3 kHz 10 kHz 3 kHz 10 kHz 3 kHz 10 kHz 3 kHz
9 kHz 50 kHz 9 kHz 200 kHz 10 kHz 200 kHz 10 kHz 100 kHz 9 kHz 100 kHz 9 kHz 100 kHz 10 kHz
459 kHz 10.7 MHz 459 kHz 10.7 MHz 450 kHz 10.7 MHz 450 kHz 10.7 MHz 450 kHz 10.7 MHz 450 kHz 10.7 MHz 450 kHz
Europe 3
87.5 - 108.0 MHz 531 - 1602 kHz
USA 1
87.9 - 107.9 MHz 530 - 1710 kHz
USA 2 Middle east/ Australia 1 Middle east// Australia 2 South America
87.9 - 107.9 MHz 530 - 1710 kHz
87.9 - 107.9 MHz 531 - 1602 kHz
87.9 - 107.9 MHz 531 - 1602 kHz
87.5 - 108.0 MHz 520 - 1620 kHz
Key and Diode Matrix
K3 KS0 KS1 KS2 KS3 KS4 KS5 KS6 KS7 KS8 KS9 MAN UP/T UP SEEK UP M1 M5/DOLBY V UP CD AREA0 COLON CLOCK VR SEL K2 MAN DN/T DN SEEK DOWN M2 M6/APSS V DOWN MODE v AREA1 v CD SEL v IF0 v POWSEL K1 STEREO SCAN UP M3 VF LOUDNESS MUTE v AREA2 v DF SEL v PRIORITY v LEDSEL DISP PS/AMEM M4/METAL BAND LOCAL POWER v AREA3 v AUTO500 v FADER v POWAMP v v v v K0
Tact switch
v
Diode switch
No. 4934-6/27
LC72323-XXXX Diode Switches
Diode matrix name On/ off Function These diodes set the target reception area. The target reception area and bands are determined by the following combinations. AREA3 AREA2 AREA1 AREA0 0 0 0 0 0 0 AREA0 AREA1 AREA2 AREA3 0 0 1 1 1 1 1 1 1 1 0 1 0 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 Europe 1 Europe 2 Europe 3 South America USA 1 USA 2 Middle east/Australia 1 Middle east/Australia 2 Europe 1 Europe 3 Europe 3 South America USA 1 USA 2 Middle east/Australia 1 Middle east/Australia 2 Area Band FM1/FM2/MW/LW MW/LW FM/AM FM1/FM2/AM FM1/FM2/AM FM1/FM2/FM3/AM FM1/FM2/AM FM1/FM2/FM3/AM FM1/FM2/FM3 FM FM1/FM2/FM3/AM FM1/FM2/FM3/AM FM1/FM2 FM FM1/FM2 FM
COLON
Clock colon display selection set to always on. Clock colon display selection set to blink at a1 Hz rate. No CD function CD function enabled Double function key selection DFSEL Mode RADIO TAPE RADIO TAPE M4/METAL M4 METAL M4 -- M5/DOLBY M5 DOLBY M5 -- M6/APSS M6 APSS M6 --
CD SEL
DF SEL
0
1
AUTO500
0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
The MAN UP/T UP and MAN DN/T DN key functions as the MAN UP/DN key The MAN UP/T UP and MAN DN/T DN key functions as the T UP/DN key Clock function enabled (24-hour display in Europe, 12-hour display in other reception areas) No clock Auto stop on SD only Auto stop on SD and IF count Clock display takes priority Frequency, tape and CD displays take priority Fader function enabled No fader function Electronic volume/tone control functions enabled No electronic volume/tone control functions The power key turns the power on or off. The HOLD pin turns the power on or off. LEDs flash when /HOLD is low. LEDs do not flash when /HOLD is low. The LC75371M input gain control data outputs +18 dB. The LC75371M input gain control data outputs 0 dB.
CLOCK
IF0
PRIORITY
FADER
VR SEL
POWSEL
LEDSEL
POWAMP
No. 4934-7/27
LC72323-XXXX Ports
Pin 1 2 Name XIN TEST2 I/O I I Allocation XIN TEST2 Active -- -- Connect to ground High: "SK" display on, low: "SK" display off In bands other than the FM band, the SK display is always off regardless of whether this pin is high or low. An SK high search starts when the VF key is pressed. When an SD present state is detected, the circuit checks again after between 375 and 500 ms, and if the signal is high, it holds that frequency. After that, if a low level continues for 25 seconds, an auto retune operation starts. (sampling = 25 ms) In VF mode and in either tape or CD mode, if a high level is input to this signal (if a high level is detected three times in a row at 25 ms intervals), the circuit switches to radio mode, and ARI broadcast reception becomes possible. Also, after a VF key on and an SK seek, DK is checked 2 s after an SK present state is recognized. Output signal that reports station reception during auto tuning. Low: "STEREO" display on, high: "STEREO" display off the STEREO display is turned off in bands other than the FM band regardless of the high or low state of this pin. Monitors all keys and outputs a 50 ms 3 kHz pulse when any key is pressed. (A pull-up resistor is required.)* These pin outputs change according to the table when either the BAND or VF key is pressed. (A pulll-up resistor is required.) 8 PH2 O BAND2 H VF FM MW 9 PH1 O BAND1 H LW BAND1 H H L L BAND2 H L L H Open Open Function Connection for the 4.5 MHz crystal Handling when unused -- --
3
PG3
I
SK
H
Connect directly to ground.
4
PG2
I
DK
H
Connect directly to ground.
5
PG1
I
/SD
L
Must be used. Connect directly to VDD.
6
PG0
I
/ST
L
7
PH3
O
BEEP
H
Open
10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 to 30 32 to 35 36 to 63
PH0 PF3 PF2 PF1 PF0 PE3 PE2 PE1 PE0 PD3 PD2 PD1 PD0 PC3 PC2 PC1 PC0 to PB0 PA3 to PA0 S28 to S1
O O O I I O O O O O O O O O O O O I O
/POWER LOCAL STEREO /TAPE TAPE RUN DOLBY METAL APSS LOUDNESS /AMUTE LEDFL DI/KS9 CLK/KS8 CE/KS7 KS6 KS5 KS4 to KS0 K3 to K0 S28 to S1
L H H L -- H H H H L H H H H H H H H H
Outputs a low level in power on mode, high in power off mode. (A pull-up resistor is required.) Outputs a low level in normal mode. Outputs a high level when the DX display is turned off in seek and scan modes. The output is inverted when the stereo key is pressed in the FM band. Detects a tape input. The " " indicator lights when high and the " when low. " indicator lights
Connect directly to ground. Open Open Connect directly to VDD. Connect directly to ground. Open Open Open Open Open Open
High indicates that the Dolby indicator is on (only in tape mode) and a low indicates that the Dolby indicator is off. High indicates that the metal indicator is on (only in tape mode) and a low indicates that the metal indicator is off. High indicates that the "APSS" indicator is on (only in tape mode) and a low indicates that the "APSS" indicator is off. High indicates that the loudness indicator is on and a low indicates that the loudness indicator is off. Audio mute output The LEDs flash when /HOLD is low. (When LEDSEL is 0.) Connect to the LC75371M DI pin. Connect to the LC75371M CLK pin. Connect to the LC75371M CE pin. Diode matrix source output
Open
Key matrix source output Key & diode matrix return input LCD segment output
Open Connect directly to ground. Open
Note: * See the item on double function key beep output.
Continued on next page.
No. 4934-8/27
LC72323-XXXX
Continued from preceding page.
Pin 64 65 66 Name COM2 COM1 /INT I/O O O I Allocation COM2 COM1 /TELIN Active H H L LCD common output When this pin is set low, "TEL" is displayed and the /AMUTE pin is set low. When PRIORITY is 0, "TEL" is displayed for 5 seconds and then the display returns to the clock display. Used for detecting the power on/off state. When /HOLD goes low * If the clock function is enabled: The clock count function operates without stopping the oscillator. * If the clock function is disabled: The oscillator is stopped and the chip goes to the power save mode. Connect to VDD. Connect to the S METER pin. (max = 3.2 V) Inputs the FM IF signal. Inputs the AM IF signal. Used for power supply detection. Connect to +5 V. FM local oscillator input AM local oscillator input Connect to ground. Phase comparator output Phase comparator output Connect to ground. Connection for the 4.5 MHz crystal Function Handling when unused Open Connect directly to VDD.
67
/HOLD
I
/HOLD
L
--
68 69 70 71 72 73 74 75 76 77 78 79 80
/RES ADI HCTR LCTR /SNS VDD FMIN AMIN VSS EO1 EO2 TEST1 XOUT
I I I I I I I I I O O I O
/RES ADI FMIF AMIF /SNS VDD FM OSC AM OSC VSS EO1 EO2 TEST1 XOUT
L -- -- -- L -- -- -- -- -- -- -- --
-- Connect directly to ground. Connect directly to ground. Connect directly to ground. Connect directly to VDD. Connect directly to VDD. Connect directly to ground. Connect directly to ground. -- Open Open Connect directly to ground. --
No. 4934-9/27
LC72323-XXXX Display
No. 4934-10/27
LC72323-XXXX Electronic Volume/Tone Controls Display Examples
No. 4934-11/27
LC72323-XXXX Key Functions 1. Keys M1 to M6 * Radio mode In radio mode these keys are used for writing and reading preset memory. Pressing and then releasing one of the keys M1 to M6 within 1.5 seconds reads out the corresponding memory. Holding the key down for over 1.5 seconds writes the currently displayed frequency to memory. * Tape mode In tape mode, the M4, M5 and M6 keys are used for tape control. Diode matrix switching enables double function key type selection. M4/Metal key The port and the display are inverted each time this key is pressed.
Key METAL METAL Display state On Off Output state H L
M5/Dolby key The port and the display are inverted each time this key is pressed.
Key DOLBY DOLBY Display state On Off Output state H L
M6/APSS key The port and the display are inverted each time this key is pressed.
Key APSS APSS Display state On Off Output state H L
* VF mode In VF mode, the M1 to M6 keys have their radio mode functions during tape and CD operation. 2. MAN UP/T UP, MAN DN/T DN * When the AUTO500 diode matrix setting is 0 The frequency is incremented or decremented by one step each time the manual tuning key is pressed. The frequency is advanced at about 70 ms per step when the key is held down for over 500 ms. The system pauses for about 500 ms when crossing from band edge to band edge. * When the AUTO500 diode matrix setting is 1 The system switches to manual tuning mode if the key is pressed and held down for less than 500 ms, and to seek mode if pressed and held down for longer than 500 ms. In VF mode, these keys function as the seek up key and the seek down key. 3. Seek up and seek down These operations automatically search for a station and hold that station when found. During a seek, the system will switch to scan mode if a scan key is pressed. Therefore, if the scan up key is pressed during a seek down operation, a scan in the up direction is started. Similarly, if the seek down (or up) key is pressed during a seek up (or down) operation, a seek down (or up) operation starts. Search mode is cleared if the same key is pressed twice in a row. The search pauses for 500 ms when switching from one band edge to another. The search speed is 50 ms per step in FM mode, and 70 ms per step in AM mode.
No. 4934-12/27
LC72323-XXXX 4. Scan up In this mode, the system searches for a station. When a station is found it stops and holds that station for 5 seconds (with AMUTE high) and flashes the frequency display. If the key is pressed once again during that interval, the system stops and holds that frequency. If no event occurs during that 5 second interval, the system resumes the search. If the seek down key is pressed during a scan, a seek in the down direction starts. Scan mode is cleared by pressing the scan up key twice. The scan pauses for 500 ms when switching from one band edge to another. The search speed is 50 ms per step in FM mode, and 70 ms per step in AM mode. 5. Band * Pressing this key switches the band. The table lists the band switching operation under each reception area.
Band switching with the band FM1 FM1 FM1 FM1 FM1 FM MW FM2 FM2 FM2 FM2 FM2 AM LW MW FM3 FM3 AM LW AM Europe 1 USA 2, Middle east/Australia 2, Europe 3, South America Europe 1 USA 1, Middle east/Australia 1, South America USA 1, Middle east/Australia 1 Europe 3 Europe 2 Reception area
* See the description for the AREA0 to AREA3 diode switch settings for details on the reception areas. 6. Local Pressing this key in radio mode turns off the DX display. If a seek or scan key is pressed in this state, the local pin goes high and a local search is performed. When the seek or scan is cleared, the local pin goes low. (See section "LOC pin control")
Key LOCAL DX Display state On Off Normal output state L L Search mode output state L H
Note: The initial state is DX mode.
7. Loudness When this key is pressed, the "LOUD" indicator lights and the LC75371M LOUD DATA goes to the on state. If this key is pressed while the LOUD indicator is lit, the indicator goes out and the LC75371M LOUD DATA goes to the off state. 8. Power (Can be used when DIMRX POWSEL = 0.) This key is used when controlling the power by the tact key in the key matrix. Pressing this key inverts the POWER pin.
No. 4934-13/27
LC72323-XXXX 9. Stereo Pressing this key inverts the STEREO pin if the system is in radio mode (including VF mode) and in the FM band. The STEREO pin is high in the initial state. 10. Mute Pressing this key sets the AMUTE pin low and the LC75371M volume setting is set to -. Furthermore, the current volume setting is displayed flashing. This mode can be cleared by pressing this key once again, or by pressing any other key. 11. PS/AMEM The system starts a preset scan operation if this key is pressed and held down for less than 2 seconds, and starts an auto store memory operation if held down for over 2 seconds. * PS operation When this key is pressed, the channel number advances sequentially starting with the next channel number after the currently displayed channel number. If no channel number is displayed, the channel number is started at 1. If there is a station present at this time, AMUTE (which is high) is cleared for a 5 second interval. The reception state is set to the DX state regardless of the LOC/DX setting and the channel number blinks at a1 Hz rate during PS operation. This operation is cleared by pressing the PS/AMEM key twice or by pressing one of the following keys: MAN UP/T UP, DISP, SEEKUP, SEEK DOWN, SCANUP, M1 to M6, VF, BAND, or CD. FM1 (FM2) (FM3) FM mode * Auto memory operation (AMEM key) The system enters auto memory operation when this key is pressed and held down for over 2 seconds. For the FM band, the system starts a search from the low edge of the band, and stores the stations found starting in M1 in order of station strength. The search stops after one pass over the band and if all the memory locations were not filled, the remaining memory locations are left unchanged. The station in M1 is recalled when the auto memory operation terminates. For the AM band, first the LOCAL pin is set high and a search is started from the low edge of the band. Stations are stored in order found starting in M1, without regard for the strength of the stations. If one pass over the band is made and not all the memory locations are filled, the local pin is set low and the search is repeated. At the point that stations are stored through M6 or two passes over the band complete, the auto memory operation terminates and the station in M1 is recalled. -- For the FM band: [When FM1, FM2 and FM3 are selected] : When started from the FM1 band, from FM1's M1 to FM1's M6 : When started from the FM2 band, from FM2's M1 to FM2's M6 : When started from the FM3 band, from FM3's M1 to FM3's M6 [When FM1 and FM2 are selected] : When started from the FM1 band, from FM1's M1 to FM1's M6 : When started from the FM2 band, from FM2's M1 to FM2's M6 [When only FM1 is selected] : When started from the FM1 band, from FM1's M1 to FM1's M6
................. Six stations ................. Six stations ................. Six stations ................. Six stations ................. Six stations ................. Six stations
For all bands, the channel number will flash at a 1 Hz rate during the auto memory operation. This operation is cleared by pressing the PS/AMEM key twice or by pressing one of the following keys: MAN UP/T UP, DISP, SEEKUP, SEEK DOWN, SCANUP, M1 to M6, VF, BAND, or CD.
No. 4934-14/27
LC72323-XXXX 12. CD When this key is pressed, the CD display is turned on and the LC75371M input switching control data is changed to specify CD mode. If this key is pressed again, CD mode is cleared, the CD display is turned off and the LC75371M input switching control data is changed to the last mode. If this key is pressed when HOLD is high, CD mode is entered with highest priority. After CD mode is turned on, CD mode is not cleared by HOLD going from high to low to high, or by the power going from on to off to back on again. 13. DISP This key is used to change the display for each mode when the clock function is enabled (when the diode matrix CLOCK setting is 0).
Mode DIMRX "PRIORITY" = 0 (Clock display takes priority) DIMRX "PRIORITY" = 1 Frequency display Press Press DISP Clock display * RADIO key Frequency display * RADIO key MAN UP/T UP SCAN UP MAN DN/T DN STEREO VF SEEK UP BAND SEEK DN Press DISP after 5 seconds Frequency display Clock display Five seconds after operation is complete Clock display DISP after 5 seconds Frequency display However, note that if a radio key is pressed during clock display, the LC72323-XXXX returns to frequency display even if the 5 seconds have not elapsed. Frequency display Press Press DISP TAPE mode Clock display Tape display DISP after 5 seconds Clock display Clock display DISP * During tape input, tape display is performed for 5 seconds. after 5 seconds Frequency display CD display Press Press DISP CD mode Clock display CD display DISP after 5 seconds Clock display Clock display DISP after 5 seconds CD display During tape or CD input SK = "H" DK = "L" Tape or CD display DK on After 5 seconds Tape or CD display SK search Frequency display VF mode SK search Frequency display After 5 seconds Clock display DK = "H" SK = "L" DK = "L" DISP DISP DISP
RADIO mode
PS/AMEM
M1 to M16
LOCAL
* During CD input, CD display is performed for 5 seconds.
* DISP + MAN UP/T UP When the clock is displayed, pressing these keys at the same time adjusts the minutes setting. Each time the keys are pressed the setting is incremented by 1 minute, and if they are held down together for over 500 ms, the minutes setting slews at 8 minutes per second. The seconds setting is reset to 0 by these operations. There is no carry out of the minutes into the hours.
No. 4934-15/27
LC72323-XXXX * DISP + MAN DN/T DN When the clock is displayed, pressing these keys at the same time adjusts the hours setting. Each time the keys are pressed the setting is incremented by 1 hour, and if they are held down together for over 500 ms, the minutes setting slews at 4 hours per second. This operation does not affect the minutes or seconds setting. 14. VF When this key is pressed, the radio is turned on in FM band (the last FM band) VF mode, whatever mode the radio was set to. The VF display is turned on and the BAND1 and BAND2 outputs are set high. Then, 375 ms later (500 ms from the AM band) an SD is checked and after another 375 to 500 ms an SK is checked. If that signal was high, that frequency is held. If that signal was low, an SK station search is performed automatically. When SK goes high that frequency is held. The SK display is turned on if SK is high in the FM band in the European reception area, regardless of the state of VF mode.
Key Display state On Off Output state BAND1 H * BAND2 H *
VF
VF
Note: * State from the previous band
The table below lists the operations that occur when the VF and SEEK keys are pressed according to the VF mode and SK signal states.
When, during a seek, the seek key for the same direction is pressed The LC72323-XXXX stops at the frequency where pressed. The LC72323-XXXX stops at the frequency where pressed.
VF (VF mode)
SK
When the VF key is pressed VF mode is turned on and an SK station search is started. VF mode is turned on.
When the SEEK key is pressed A normal station search is started. A normal station search is started.
When the VF key is pressed during a seek. VF mode is turned on and an SK station search is started. VF mode is turned on and an SK station search is started. VF mode is turned off and the LC72323-XXXX returns to the state prior to entering VF mode.
Off
L
Off
H
On
L/H
VF mode is turned off.
An SK station search is started.
The seek continues.
*
The table below lists the operations that occur depending on SK and DK when VF is pressed when the system is in tape or CD mode (with VF mode off).
SK DK Operation when VF mode is switched from off to on by pressing the VF key in tape or CD mode The frequency is displayed and an up direction SK signal seek is started. If a high level SKIN is found, the display switches to CD or tape mode. If DK is high, operation continues with item below. The tape or CD display remains unchanged. If DK is high, operation continues with item below. If SK goes low for 25 seconds, a retune operation is started. The frequency is displayed and an ARI broadcast is started. Mode TAPE mode CD mode TAPE mode CD mode VF mode
L
L

H H
L H
* On a power on (HOLD: low high), SK is checked for 25 seconds, and a retune operation is started if low. * VF mode is cleared when the VF or BAND key is pressed. However, the BAND key is ignored if TAPE is low or CD is on.
No. 4934-16/27
LC72323-XXXX The figure shows the state transition diagram for VF mode.
15. MODE Pressing this key steps through the volume/tone controls starting with the bass control, which is the next control. The system automatically returns to the volume control position 5 seconds after this key is released, and the 7 segment character display returns to frequency, tape, or CD display. However, if V-UP or V-DOWN is pressed within 5 seconds the system returns to the volume control position 5 seconds after that key is released, and the 7 segment character display returns to frequency, tape, or CD display. BASS TREBLE BALANCE FADER VOLUME
No. 4934-17/27
LC72323-XXXX 16. V UP, V DOWN When one of these keys is pressed, the setting is increased or decreased in 1 dB steps. When DK is on, the volume is increased up to -30 dB. If the volume is over -30 dB, it remains unchanged. In the tuner, tape, or CD display states, setting always starts with the volume setting when these keys are pressed. In volume mode
Control data (dB) - -79 -78 -77 -76 -75 -74 -73 -72 -71 -70 -69 -68 -67 -66 -65 -64 -63 -62 -61 -60 Display 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Control data (dB) -59 -58 -57 -56 -55 -54 -53 -52 -51 -50 -49 -48 -47 -46 -45 -44 -43 -42 -41 -40 -39 Display 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 Control data (dB) -38 -37 -36 -35 -34 -33 -32 -31 -30 -29 -28 -27 -26 -25 -24 -23 -22 -21 -20 -19 -18 Display 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 Control data (dB) -17 -16 -15 -14 -13 -12 -11 -10 -9 -8 -7 -6 -5 -4 -3 -2 -1 0 Display 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80
* When one of these keys is held down for over 500 ms, the setting slews at 150 ms per step. * The initial value is -50 dB. In bass/treble mode
Control data () Step 18 Step 17 Step 16 Step 15 Step 14 Step 13 Step 12 Step 11 Display 7 6 5 4 3 2 1 0 Control data () Step 10 Step 9 Step 8 Step 7 Step 6 Step 5 Step 4 Display -1 -2 -3 -4 -5 -6 -7
No. 4934-18/27
LC72323-XXXX * When one of these keys is held down for over 500 ms, the setting slews at 150 ms per step. * The initial value is step 11. In balance mode
Display Volume difference (dB)
0 0
1 -2
2 -4
3 -6
4 -8
5 -10
6 -12
7 -14
8 -16, -18
9 -20, -24
10 -34, -44
11 -64
12 -
* When one of these keys is held down for over 500 ms, the setting slews at 150 ms per step. * The initial value is 0 dB. In fader mode
Display Volume difference (dB)
0 0
1 -2
2 -4
3 -6
4 -8
5 -10
6 -12
7 -14
8 -16, -18
9 -20, -24
10 -34, -44
11 -64
12 -
* When one of these keys is held down for over 500 ms, the setting slews at 150 ms per step. * The initial value is 0 dB. Power Supply Connection 1. When the power key is used (when the diode matrix POWSEL setting is 0)
2. When an external power switch is used (when the diode matrix POWSEL setting is 0 or 1)
No. 4934-19/27
LC72323-XXXX LC75371M Control 1. Input switching control Each time the mode changes, the input switching control data for the LC75371M changes as listed in the table.
Mode RADIO TAPE CD LC75371M state D0 0 1 0 D1 0 0 1 R/L input port L1 (R1) L2 (R2) L3 (R3)
2. Transfer data output timing * When AMUTE turns on and off
Note: When HOLD goes from low to high - data is transferred twice at an interval of 125 ms during the pre-muting period.
* When the V UP, V DOWN, or MUTE key is on Data is transferred when the key is pressed. * When the power goes from off to on If the power is turned off with the volume at a value of -16 dB or higher, the volume is first set to -50 dB. Timing 1. T UP/DN, SEEK, SCAN
Note: 1. IF count tolerance
FM MW LW
10.7 MHz 10 kHz 450 kHz 3 kHz 450 kHz 0.6 kHz
2. SD is checked for 10 ms if IF counting is enabled, and for 15 ms is IF counting is disabled.
2. Manual up and down (for both AM and FM modes)
No. 4934-20/27
LC72323-XXXX 3. LOC pin control Seek, scan, AMEM, VF and auto retune operations when the DX display is off
4. SK check timing when VF mode is switched from off to on
5. LED flashing The LEDFL port operates as shown below when HOLD is low if the diode matrix LEDSEL setting is 0. (Backup mode is not entered when clock operation is enabled.)
6. Audio mute (AMUTE) Key chattering rejection time (40 ms) Audio mute lead time and beep output (50 ms) PLL data and display change processing (30 to 50 ms) Audio mute trailing time * BAND and M1 to M6 keys, and a VF on to off transition
No. 4934-21/27
LC72323-XXXX * VF off to on (except when TAPE and CDIN are low and CD mode is on with no DK signal)
Note: 1. Period includes an SK check. 2. AMUTE is not output in tape or CD mode (with DK low).
* UP, DOWN
Note: Period becomes 500 to 625 ms for a band edge to band edge operation.
* PS (preset scan)
* AMEM, T UP/DN, SEEK, SCAN
* VF auto retune
No. 4934-22/27
LC72323-XXXX 7. VF off to on timing (When a tape or CD is loaded)
8. Allowed timing for the scan direction display by DIR In FM radio mode or VF mode, the " " and " " displays are controlled as follows by SK controlled SK display, ST controlled ST display and TAPERUN.
9. Beep output For double function keys, i.e., M1 to M6, UP/T-UP, DOWN/T-DOWN, V-UP, V-DOWN and PS/AMEM, a beep tone is output once (within 0.5, 1.5 or 2.0 seconds) or twice (over 0.5, 1.5 or 2.0 seconds) so that the user will know which key has been pressed.
No. 4934-23/27
LC72323-XXXX 10. Hold mode When the clock function is enabled, if the HOLD pin goes from high to low input to the FMIN, AMIN and HCTR pins will be disabled, and the system will go to a state where only the clock operates. This is called hold mode. When the HOLD pin goes from low to high, hold mode is cleared and the system returns to normal mode.
11. Backup mode When the clock function is disabled, if the HOLD pin goes from high to low input to the FMIN, AMIN and HCTR pins will be disabled, the 4.5 MHz crystal oscillator will be stopped and the system will go to a power saving mode. This is called backup mode. When the HOLD pin goes from low to high, hold mode is cleared and the system returns to normal mode 75 ms* later.
Note: All output ports go to the high-impedance state during this period. Initial States
RADIO mode * * * * Band ..........................FM1 (low band edge) MO/ST .......................stereo VF ..............................off DX .............................LOCAL off * * * TAPE mode NR B ..........................off APS ...........................off MTL ...........................off * * * * POWER on, HOLD = `H' Volume setting...........-50 dB CD off LOUD ........................off MUTE off
Tracking Point Frequency
Area Band FM Europe MW LW USA Middle east/ Australia South America FM AM FM AM FM AM M1 87.5 531 153 87.9 530 87.9 531 87.5 520 M2 90.0 603 160 90.1 600 90.0 603 90.0 600 M3 89.0 999 200 98.1 1000 98.0 999 98.0 1000 M4 106.0 1404 260 106.1 1400 106.0 1404 160.0 1400 M5 108.0 1602 281 107.9 1710 107.9 1602 108.0 1620 M6 87.5 531 153 87.9 530 87.9 531 87.5 520 Last channel 87.5 531 153 87.9 530 87.9 531 87.5 520
Note: The lower band edge is loaded for FM2, FM3 and MW2.
No. 4934-24/27
LC72323-XXXX Application Circuit 1. When the POWER key is a touch switch Diode matrix POWSEL setting is 0.
No. 4934-25/27
LC72323-XXXX 2. When the POWER key is a mechanical switch Diode matrix POWSEL setting is 1.
No. 4934-26/27
LC72323-XXXX
s No products described or contained herein are intended for use in surgical implants, life-support systems, aerospace equipment, nuclear power control systems, vehicles, disaster/crime-prevention equipment and the like, the failure of which may directly or indirectly cause injury, death or property loss. s Anyone purchasing any products described or contained herein for an above-mentioned use shall: Accept full responsibility and indemnify and defend SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors and all their officers and employees, jointly and severally, against any and all claims and litigation and all damages, cost and expenses associated with such use: Not impose any responsibility for any fault or negligence which may be cited in any such claim or litigation on SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors or any of their officers and employees jointly or severally. s Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guaranteed for volume production. SANYO believes information herein is accurate and reliable, but no guarantees are made or implied regarding its use or any infringements of intellectual property rights or other rights of third parties. This catalog provides information as of January, 1997. Specifications and information herein are subject to change without notice. No. 4934-27/27

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