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UPD178024GC-051 Fiches technique(PDF) 6 Page - NEC |
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UPD178024GC-051 Fiches technique(HTML) 6 Page - NEC |
6 / 98 page Data Sheet U14608EJ1V0DS00 6 µµµµPD178024GC-051 Pin No. Symbol Pin Name Description I/O Type This pin inputs an analog signal indicating the audio level in each audio frequency band from a bandpass filter IC (BA3835F). Connect this pin to the AOUT pin (pin 17) of the bandpass filter IC (BA3835F) and input an analog signal to the device in accordance with a given audio level. This pin is used to identify the audio level in each audio frequency band to be displayed by the spectrum analyzer. The audio level varies, depending on the input voltage, as follows, regardless of the audio frequency band: Input voltage (VDD = 5.0 V) Audio Level 239.5 ÷ 256 × VDD or more (4.7 V or more) 10 Less than 239.5 ÷ 256 × VDD (less than 4.7 V) 219.5 ÷ 256 × VDD or more (4.3 V or more) 9 Less than 219.5 ÷ 256 × VDD (less than 4.3 V) 199.5 ÷ 256 × VDD or more (3.9 V or more) 8 Less than 199.5 ÷ 256 × VDD (less than 3.9 V) 179.5 ÷ 256 × VDD or more (3.5 V or more) 7 Less than 179.5 ÷ 256 × VDD (less than 3.5 V) 149.5 ÷ 256 × VDD or more (2.9 V or more) 6 Less than 149.5 ÷ 256 × VDD (less than 2.9 V) 119.5 ÷ 256 × VDD or more (2.3 V or more) 5 Less than 119.5 ÷ 256 × VDD (less than 2.3 V) 89.5 ÷ 256 × VDD or more (1.7 V or more) 4 Less than 89.5 ÷ 256 × VDD (less than 1.7 V) 59.5 ÷ 256 × VDD or more (1.1 V or more) 3 Less than 59.5 ÷ 256 × VDD (less than 1.1 V) 29.5 ÷ 256 × VDD or more (0.6 V or more) 2 Less than 29.5 ÷ 256 × VDD (less than 0.6 V) 4.5 ÷ 256 × VDD or more (0.1 V or more) 1 Less than 4.5 ÷ 256 × VDD (less than 0.1 V) 0 5 SPEC IN Spectrum analyzer signal input For spectrum analyzer display, refer to “6. LCD PANEL”. Analog input This pin inputs a signal meter signal from a tuner pack. Input an analog signal in accordance with the intensity of the received electric field to this pin. This pin is used to detect a broadcasting station during auto tuning of the radio. A station is detected by the signal meter signal as follows, depending on the input voltage but regardless of the received band and received sensitivity (local/DX): Input Voltage (VDD = 5.0 V) Station Detection 128.5 ÷ 256 × VDD or more (2.49 V or more) Station detected Less than 128.5 ÷ 256 × VDD (less than 2.49 V) Station not detected 6 SM Signal meter signal input For station detection, refer to “3.4 Station Detection”. Analog input |
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Description similaire - UPD178024GC-051 |
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