AM/FM/WB disaster warning radio scheme
SG0702 IC is an integrated circuit which integrates AM/FM radio frequency display clock control and radio auxiliary control. Especially suitable for AC1602 as the main chip of the multi-band radio with WB band to achieve PLL frequency control, frequency storage, 40 sections of electronic volume, timing automatic shutdown, luminous lighting, stereo symbol display, battery power measurement, battery undervoltage automatic shutdown and other functions. COMS process integrated circuit adopts I2C bus control mode.
The characteristics of
4 band frequency phase-locked FM, MW, SW, WB
90 radio storage: (FM: 30 MW: 30 SW: 30 expandable)
Manual, automatic storage tuning mode
Push-button 40 section electronic volume
Tuning mute function
Antenna signal strength display: RSSI and SNR
LCD4 common pole driver 21 character segments, driving 1/3BIAS 1/4duty
External 32.168K crystal oscillator
Voltage 1.8V-5.5V, typical 3V
24 hour clock function
90 minutes automatic shutdown function
24 hours timing boot function
Arbitrary button luminous lighting
Low voltage automatic shutdown function
EEPROM 24LC02 radio storage (optional)
Support PWM output (voltage control, single tone buzzer alarm)
Key Function Description
POWER, SLEEP: POWER ON/OFF switch, "press" POWER OFF, POWER ON OFF, ON press for more than 1S to enter SLEEP 90-80-70... 0 to cancel SLEEP, the SLEEP flag is displayed after automatic shutdown is enabled.
BAND/TIME SET: BAND/TIME SET: BAND/TIME SET: BAND/TIME SET: fM-AM-WB-FM... . Set the clock time when the circulating power is OFF.
MEM/ALON, OFF (storage station/timing switch setting) : When the power supply is ON: Storage station During the MEM CH MEM storage station, the LCD MEMO and auxiliary display area blink at the speed of 0.5 seconds. When you press MEM to confirm the power OFF, "press" to enter the setting state of AL timing boot, and adjust with the UP and DOWN keys.
UP DOWN/ : When POWER ON, adjust the frequency UP and DOWN, press more than 0.5s to automatically search, when POWER OFF: cooperate with BAND/AL/TIME SET key, adjust the frequency by points.
M+, M- : When POWER ON, use the MEN key to flip the storage page up and down. Press P+ to call the storage location, and then press P- to flip the page up and down.
VOL+ VOL-potential output button, increasing VOL UP and decreasing VOL DOWN Press over 0.5s to start the combo function LCD lights UP the VOL mark auxiliary display part to display the corresponding series.
ALERT: in WB band and enter 1-7CH, enter 1050HZ waiting for alarm state, when the condition is established, automatically turn on the radio.
