Ordering number : *EN4934A CMOS LSI LC72323-XXXX Provisional Development Specifications Preliminary Overview Package Dimensions 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. 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 = 25°C, VSS = 0 V Parameter Maximum supply voltage Input voltage Symbol VIN (1) HOLD, TELIN, RES, SNS, ADI, SD, ST, SK, DK VIN (2) Inputs other than VIN (1) VOUT (1) Output voltage Output current Allowable power dissipation Conditions Ratings VDD max Unit –0.3 to +6.5 V –0.3 to +13 V –0.3 to VDD + 0.3 V –0.3 to +15 V –0.3 to VDD + 0.3 V BEEP, BAND2, BAND1, POWER VOUT (2) Outputs other than VOUT (1) IOUT (1) AMUTE, LEDFL, DI/KS9, CLK/KS8, BEEP, BAND2, BAND1, POWER 0 to 5 mA IOUT (2) DOLBY, METAL, APSS, LOUDNESS, LOCAL, STEREO 0 to 3 mA IOUT (3) KS0, KS1, KS2, KS3, KS4, KS5, KS6, CE/KS7 0 to 1 mA Pd max Ta = –40 to +85°C 300* mW Operating temperature Topr –40 to +85 °C Storage temperature Tstg –45 to +125 °C Note: * Reference value Allowable Operating Ranges at Ta = –40 to +85°C, VDD = 3.5 to 5.5 V Parameter Supply voltage Input high level voltage Input low level voltage Input frequency Input amplitude Input voltage range Symbol Conditions Ratings min typ max Unit VDD (1) With the CPU and PLL operating 4.5 5.5 V VDD (2) CPU operating 3.5 5.5 V VDD (3) Memory retention 1.3 5.5 V VIH (1) SK, DK, SD, ST 0.7 VDD 8.0 V 0.8 VDD 8.0 V 2.5 8.0 V VDD V VIH (2) RES, INT, HOLD VIH (3) SNS VIH (4) K0, K1, K2, K3 0.6 VDD VIH (5) TAPE, TAPERUN 0.7 VDD VDD V VIL (1) SK, DK, SD, ST 0 0.3 VDD V VIL (2) RES, INT 0 0.2 VDD V VIL (3) SNS 0 1.3 V VIL (4) K0, K1, K2, K3 0 0.2 VDD V VIL (5) TAPE, TAPERUN 0 0.3 VDD V VIL (6) HOLD 0 0.4 VDD FIN (1) XIN FIN (2) FM OSC, VIN (2), VDD (1) 10 130 MHz FIN (3) AM OSC, VIN (3), VDD (1) 0.5 10 MHz FIN (4) FMIF, VIN (4), VDD (1) 0.4 12 MHz FIN (5) AMIF, VIN (4), VDD (1) 100 500 kHz VIN (1) XIN 0.50 1.5 Vrms VIN (2) FM OSC 0.10 1.5 Vrms VIN (3) AM OSC 0.10 1.5 Vrms VIN (4) FMIF, AMIF 0.10 1.5 Vrms VIN (5) ADI 0 VDD V 4.0 4.5 5.0 V MHz No. 4934-2/27 LC72323-XXXX Electrical Characteristics for the Allowable Operating Ranges Parameter Power down detection voltage Input high level current Input low level current Symbol Conditions VDET 2.7 µA µA 2.0 5.0 15 FM OSC, AM OSC, FMIF, AMIF: VI = VDD = 5.0 V 4.0 10 30 IIH (4) K0, K1, K2, K3: VI = VDD = 5.0 V 50 µA µA IIH (5) TAPE, TAPERUN: VI = VDD 3.0 µA IIL (1) TELIN, HOLD, RES, ADI, SNS, SK, DK, SD, ST: VI = VSS 3.0 µA IIL (2) XIN: VI = VSS 2.0 5.0 15 µA IIL (3) FM OSC, AM OSC, FMIF, AMIF: VI = VSS 4.0 10 30 µA IIL (4) TAPE, TAPERUN: VI = VSS 3.0 µA K0, K1, K2, K3: VDD = 5 V IOFFH (1) EO1, EO2: VO = VDD IOFFH (2) KS0 to KS6, CE/KS7, CLK/KS8, DI/KS9, LEDFL, AMUTE, LOUDNESS, APSS, METAL, DOLBY, STEREO, LOCAL: VO = VDD 0.05 VDD 75 V 100 200 kΩ 0.01 10 nA 3.0 µA 5.0 µA 10 nA 3.0 µA VDD – 0.5 V IOFFH (3) BAND1, BAND2, BEEP, POWER: VO = 13 V IOFFL (1) EO1, EO2: VO = VSS IOFFL (2) KS0 to KS6, CE/KS7, CLK/KS8, DI/KS9, LEDFL, AMUTE, LOUDNESS, APSS, METAL, DOLBY, STEREO, LOCAL: VO = VSS VOH (1) KS0 to KS6, CE/KS7: IO = 1 mA VDD – 2.0 VOH (2) LOUDNESS, APSS, METAL, DOLBY, STEREO, LOCAL: IO = 1 mA VDD – 1.0 V 0.01 VDD – 1.0 VOH (3) EO1, EO2: IO = 500 µA VDD – 1.0 V VOH (4) XOUT: IO = 200 µA VDD – 1.0 V VOH (5) S1 to S28: IO = 0.1 mA VDD – 1.0 VOH (6) COM1, COM2: IO = 25 µA VOH (7) AMUTE, LEDFL, CLK/KS8, DI/KS9: IO = 5 mA VOL (1) KS0 to KS6, CE/KS7: IO = 50 µA 2.0 V VOL (2) LOUDNESS, APSS, METAL, DOLBY, STEREO, LOCAL: IO = 1 mA 1.0 V VOL (3) EO1, EO2: IO = 500 µA 1.0 V VOL (4) XOUT: IO = 200 µA 1.0 V VOL (5) S1 to S28: IO = 0.1 mA 1.0 V VOL (6) AMUTE, LEDFL, CLK/KS8, DI/KS9: IO = 5 mA 1.0 V VOL (7) COM1, COM2: IO = 25 µA 0.75 V 2.0 (400 Ω) V VOL (8) Current drain 3.0 XIN: VI = VDD = 5.0 V RPD Output mid-level voltage V IIH (3) Pull-down resistance Output low level voltage 3.3 IIH (2) K0, K1, K2, K3 Output high level voltage 3.0 Unit max IIH (1) VIF Output off leakage current typ TELIN, HOLD, RES, ADI, SNS, SK, DK, SD, ST: VI = 5.5 V Input floating voltage Output off leakage current Ratings min VM BAND1, BAND2, BEEP, POWER: IO = 5 mA COM1, COM2, VDD = 5 V, IO = 20 µA VDD – 0.75 V VDD – 0.5 VDD – 0.3 VDD – 1.0 0.5 0.3 1.0 0.5 0.75 (150 Ω) 2.0 V V 2.5 3.0 V IDD (1) VDD (1), FIN (2) = 130 MHz 15 20 mA IDD (2) VDD (2), PLL stopped, (hold mode, Figure 1) 1.0 IDD (3) VDD = 5.5 V, oscillator stopped, Ta = 25°C (backup mode, Figure 2) 5 µA IDD (4) VDD = 2.5 V, oscillator stopped, Ta = 25°C (backup mode, Figure 2) 1 µA mA 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 Europe 1 Europe 2 Europe 3 USA 1 USA 2 Middle east/ Australia 1 Middle east// Australia 2 South America Channel spacing Reciving frequency FM 87.5 – 108.0 MHz MW 531 – 1602 kHz LW 153 – 281 kHz MW 531 – 1602 kHz LW 153 – 281 kHz FM 87.5 – 108.0 MHz AM 531 – 1602 FM 87.9 – 107.9 MHz 530 – 1710 FM 87.9 – 107.9 MHz 530 – 1710 FM 87.9 – 107.9 MHz kHz AM 531 – 1602 FM 87.9 – 107.9 MHz kHz AM 531 – 1602 FM 87.5 – 108.0 MHz AM 520 – 1620 Reference frequency IF IF count tolerance 50 kHz 50 kHz 25 kHz 10.7 MHz ±10 kHz 9 kHz 9 kHz 1 kHz 1 kHz kHz kHz 459 kHz ±3 kHz ±0.6 kHz 9 kHz 9 kHz 1 kHz 1 kHz 50 kHz 50 kHz 25 kHz 10.7 MHz 9 kHz 9 kHz 9 kHz 459 kHz ±3 kHz 200 kHz 200 kHz 25 kHz 10.7 MHz ±10 kHz 10 kHz 10 kHz 10 kHz 450 kHz ±3 kHz 200 kHz 200 kHz 25 kHz 10.7 MHz ±10 kHz 10 kHz 10 kHz 10 kHz 450 kHz ±3 kHz 100 kHz 100 kHz 25 kHz 10.7 MHz ±10 kHz 9 kHz kHz AM Manual 9 kHz kHz AM Auto 459 kHz ±3 kHz ±0.6 kHz ±10 kHz 9 kHz 9 kHz 9 kHz 450 kHz ±3 kHz 100 kHz 100 kHz 25 kHz 10.7 MHz ±10 kHz 9 kHz 9 kHz 9 kHz 450 kHz ±3 kHz 100 kHz 100 kHz 25 kHz 10.7 MHz ±10 kHz 10 kHz 10 kHz 10 kHz 450 kHz ±3 kHz Key and Diode Matrix K3 K2 K1 K0 KS0 MAN UP/T UP MAN DN/T DN STEREO DISP KS1 SEEK UP SEEK DOWN SCAN UP PS/AMEM KS2 M1 M2 M3 M4/METAL KS3 M5/DOLBY M6/APSS VF BAND KS4 V UP V DOWN LOUDNESS LOCAL KS5 CD MODE MUTE KS6 AREA0 ▲ AREA1 ▲ AREA2 ▲ AREA3 ▲ KS7 COLON ▲ CD SEL ▲ DF SEL ▲ AUTO500 ▲ KS8 CLOCK ▲ IF0 ▲ PRIORITY ▲ FADER ▲ KS9 VR SEL ▲ POWSEL ▲ LEDSEL ▲ POWAMP ▲ POWER ⇒ Tact switch ▲ ⇒ 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 Area Band 0 0 0 0 Europe 1 FM1/FM2/MW/LW 0 0 0 1 Europe 2 MW/LW 0 0 1 0 Europe 3 FM/AM 0 0 1 1 South America FM1/FM2/AM 0 1 0 0 USA 1 FM1/FM2/AM 0 1 0 1 USA 2 FM1/FM2/FM3/AM AREA0 0 1 1 0 Middle east/Australia 1 FM1/FM2/AM AREA1 0 1 1 1 Middle east/Australia 2 FM1/FM2/FM3/AM AREA2 1 0 0 0 Europe 1 FM1/FM2/FM3 AREA3 1 0 0 1 Europe 3 FM 1 0 1 0 Europe 3 FM1/FM2/FM3/AM 1 0 1 1 South America FM1/FM2/FM3/AM 1 1 0 0 USA 1 FM1/FM2 1 1 0 1 USA 2 FM 1 1 1 0 Middle east/Australia 1 FM1/FM2 1 1 1 1 Middle east/Australia 2 FM COLON CD SEL 0 Clock colon display selection set to always on. 1 Clock colon display selection set to blink at a1 Hz rate. 0 No CD function 1 CD function enabled Double function key selection DFSEL 0 DF SEL 1 AUTO500 CLOCK IF0 PRIORITY FADER VR SEL POWSEL LEDSEL POWAMP M4/METAL M5/DOLBY RADIO Mode M4 M5 M6/APSS M6 TAPE METAL DOLBY APSS RADIO M4 M5 M6 TAPE — — — 0 The MAN UP/T UP and MAN DN/T DN key functions as the MAN UP/DN key 1 The MAN UP/T UP and MAN DN/T DN key functions as the T UP/DN key 0 Clock function enabled (24-hour display in Europe, 12-hour display in other reception areas) 1 No clock 0 Auto stop on SD only 1 Auto stop on SD and IF count 0 Clock display takes priority 1 Frequency, tape and CD displays take priority 0 Fader function enabled 1 No fader function 0 Electronic volume/tone control functions enabled 1 No electronic volume/tone control functions 0 The power key turns the power on or off. 1 The HOLD pin turns the power on or off. 0 LEDs flash when /HOLD is low. 1 LEDs do not flash when /HOLD is low. 0 The LC75371M input gain control data outputs +18 dB. 1 The LC75371M input gain control data outputs 0 dB. No. 4934-7/27 LC72323-XXXX Ports Pin Name I/O Allocation Active 1 XIN I XIN — Connection for the 4.5 MHz crystal — 2 TEST2 I TEST2 — Connect to ground — H 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) Connect directly to ground. Connect directly to ground. 3 PG3 I SK Function Handling when unused 4 PG2 I DK H 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. 5 PG1 I /SD L Output signal that reports station reception during auto tuning. Must be used. 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. Connect directly to VDD. 6 PG0 I /ST L 7 PH3 O BEEP H Monitors all keys and outputs a 50 ms 3 kHz pulse when any key is pressed. (A pull-up resistor is required.)* Open 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 BAND1 BAND2 VF H H FM H L MW L L LW L H Open 9 PH1 O BAND1 H Open 10 PH0 O /POWER L Outputs a low level in power on mode, high in power off mode. (A pull-up resistor is required.) Connect directly to ground. 11 PF3 O LOCAL H Outputs a low level in normal mode. Outputs a high level when the DX display is turned off in seek and scan modes. Open 12 PF2 O STEREO H The output is inverted when the stereo key is pressed in the FM band. Open 13 PF1 I /TAPE L Detects a tape input. Connect directly to VDD. 14 PF0 I TAPE RUN — The “ ” indicator lights when high and the “ when low. 15 PE3 O DOLBY H High indicates that the Dolby indicator is on (only in tape mode) and a low indicates that the Dolby indicator is off. Open 16 PE2 O METAL H High indicates that the metal indicator is on (only in tape mode) and a low indicates that the metal indicator is off. Open 17 PE1 O APSS H High indicates that the “APSS” indicator is on (only in tape mode) and a low indicates that the “APSS” indicator is off. Open 18 PE0 O LOUDNESS H High indicates that the loudness indicator is on and a low indicates that the loudness indicator is off. Open ” indicator lights Connect directly to ground. 19 PD3 O /AMUTE L Audio mute output Open 20 PD2 O LEDFL H The LEDs flash when /HOLD is low. (When LEDSEL is 0.) Open 21 PD1 O DI/KS9 H Connect to the LC75371M DI pin. 22 PD0 O CLK/KS8 H Connect to the LC75371M CLK pin. 23 PC3 O CE/KS7 H Connect to the LC75371M CE pin. 24 PC2 O KS6 H Diode matrix source output Open 25 PC1 O KS5 H 26 to 30 PC0 to PB0 O KS4 to KS0 H Key matrix source output Open 32 to 35 PA3 to PA0 I K3 to K0 H Key & diode matrix return input Connect directly to ground. 36 to 63 S28 to S1 O S28 to S1 H LCD segment output 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 Name I/O Allocation Active 64 COM2 O COM2 H 65 COM1 O COM1 H 66 /INT I /TELIN Function Handling when unused LCD common output Open L 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. Connect directly to VDD. — 67 /HOLD I /HOLD L 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. 68 /RES I /RES L Connect to VDD. — 69 ADI I ADI — Connect to the S METER pin. (max = 3.2 V) Connect directly to ground. 70 HCTR I FMIF — Inputs the FM IF signal. Connect directly to ground. 71 LCTR I AMIF — Inputs the AM IF signal. Connect directly to ground. 72 /SNS I /SNS L Used for power supply detection. Connect directly to VDD. 73 VDD I VDD — Connect to +5 V. Connect directly to VDD. 74 FMIN I FM OSC — FM local oscillator input Connect directly to ground. 75 AMIN I AM OSC — AM local oscillator input Connect directly to ground. 76 VSS I VSS — Connect to ground. — 77 EO1 O EO1 — Phase comparator output Open 78 EO2 O EO2 — Phase comparator output Open 79 TEST1 I TEST1 — Connect to ground. Connect directly to ground. 80 XOUT O XOUT — Connection for the 4.5 MHz crystal — 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 Display state METAL Output state On H Off L M5/Dolby key The port and the display are inverted each time this key is pressed. Key DOLBY Display state DOLBY Output state On H Off L M6/APSS key The port and the display are inverted each time this key is pressed. Key APSS Display state APSS Output state On H Off 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 Reception area FM1 FM2 MW LW FM1 FM2 FM3 AM FM1 FM2 FM3 FM1 FM2 AM FM1 FM2 FM AM MW LW 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 • 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 Display state DX Normal output state Search mode output state On L L Off 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 mode Press DISP after 5 seconds Frequency display * RADIO key Frequency display Clock display Five seconds after operation is complete DISP after 5 seconds Frequency display * RADIO key MAN UP/T UP SCAN UP DISP Clock display MAN DN/T DN PS/AMEM STEREO M1 to M16 VF SEEK UP BAND SEEK DN LOCAL 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 TAPE mode Clock display DISP DISP after 5 seconds Press DISP Tape display 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 CD display Clock display DISP DISP after 5 seconds Clock display Clock display DISP • During CD input, CD display is performed for 5 seconds. after 5 seconds CD display During tape or CD input SK search Frequency display VF mode SK search Frequency display SK = “H” DK = “L” After 5 seconds Tape or CD display Clock display DK = “H” SK = “L” DK = “L” DK on After 5 seconds Tape or CD display • 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 Output state Display state VF VF BAND1 BAND2 On H H Off * * 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 When the VF key is pressed during a seek. A normal station search is started. The LC72323-XXXX stops at the frequency where pressed. VF mode is turned on and an SK station search is started. VF mode is turned on. A normal station search is started. The LC72323-XXXX stops at the frequency where pressed. VF mode is turned on and an SK station search is started. VF mode is turned off. An SK station search is started. The seek continues. VF mode is turned off and the LC72323-XXXX returns to the state prior to entering VF mode. VF (VF mode) SK When the VF key is pressed Off L VF mode is turned on and an SK station search is started. Off H On L/H When the SEEK key is pressed 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). Operation when VF mode is switched from off to on by pressing the VF key in tape or CD mode SK DK ➀ L L 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 ➂ below. TAPE mode CD mode ➁ H L The tape or CD display remains unchanged. If DK is high, operation continues with item ➂ below. If SK goes low for 25 seconds, a retune operation is started. TAPE mode CD mode ➂ H H The frequency is displayed and an ARI broadcast is started. VF mode Mode • 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) Display Control data (dB) Display Control data (dB) Display Control data (dB) Display –∞ 0 –59 21 –38 42 –17 63 –79 1 –58 22 –37 43 –16 64 –78 2 –57 23 –36 44 –15 65 –77 3 –56 24 –35 45 –14 66 –76 4 –55 25 –34 46 –13 67 –75 5 –54 26 –33 47 –12 68 –74 6 –53 27 –32 48 –11 69 –73 7 –52 28 –31 49 –10 70 –72 8 –51 29 –30 50 –9 71 –71 9 –50 30 –29 51 –8 72 –70 10 –49 31 –28 52 –7 73 –69 11 –48 32 –27 53 –6 74 –68 12 –47 33 –26 54 –5 75 –67 13 –46 34 –25 55 –4 76 –66 14 –45 35 –24 56 –3 77 –65 15 –44 36 –23 57 –2 78 –64 16 –43 37 –22 58 –1 79 0 80 –63 17 –42 38 –21 59 –62 18 –41 39 –20 60 –61 19 –40 40 –19 61 –60 20 –39 41 –18 62 • 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 (∞) Display Control data (∞) Display Step 18 7 Step 10 –1 Step 17 6 Step 9 –2 Step 16 5 Step 8 –3 Step 15 4 Step 7 –4 Step 14 3 Step 6 –5 Step 13 2 Step 5 –6 Step 12 1 Step 4 –7 Step 11 0 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 0 1 2 3 4 5 6 7 8 9 10 11 12 Volume difference (dB) 0 –2 –4 –6 –8 –10 –12 –14 –16, –18 –20, –24 –34, –44 –64 –∞ • 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 0 1 2 3 4 5 6 7 8 9 10 11 12 Volume difference (dB) 0 –2 –4 –6 –8 –10 –12 –14 –16, –18 –20, –24 –34, –44 –64 –∞ • 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. LC75371M state Mode D0 D1 RADIO 0 0 R/L input port L1 (R1) TAPE 1 0 L2 (R2) CD 0 1 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 10.7 MHz ± 10 kHz MW 450 kHz ± 3 kHz LW 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) ➀ Key chattering rejection time (40 ms) ➁ Audio mute lead time and beep output (50 ms) ➂ PLL data and display change processing (30 to 50 ms) ➃ 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 ➂ includes an SK check. 2. AMUTE is not output in tape or CD mode (with DK low). • UP, DOWN Note: Period ➃ 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 • • • • TAPE mode Band ..........................FM1 (low band edge) MO/ST .......................stereo VF ..............................off DX .............................LOCAL off • • • POWER on, HOLD = ‘H’ • • • • NR B ..........................off APS ...........................off MTL ...........................off Volume setting...........–50 dB CD off LOUD ........................off MUTE off Tracking Point Frequency Area Europe USA Middle east/ Australia South America Band M1 M2 M3 M4 M5 M6 Last channel FM 87.5 90.0 89.0 106.0 108.0 87.5 87.5 MW 531 603 999 1404 1602 531 531 LW 153 160 200 260 281 153 153 87.9 FM 87.9 90.1 98.1 106.1 107.9 87.9 AM 530 600 1000 1400 1710 530 530 FM 87.9 90.0 98.0 106.0 107.9 87.9 87.9 AM 531 603 999 1404 1602 531 531 FM 87.5 90.0 98.0 160.0 108.0 87.5 87.5 AM 520 600 1000 1400 1620 520 520 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 ■ 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. ■ Anyone purchasing any products described or contained herein for an above-mentioned use shall: ➀ 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: ➁ 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. ■ 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