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TA2159F Datasheet(PDF) 8 Page - Toshiba Semiconductor |
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TA2159F Datasheet(HTML) 8 Page - Toshiba Semiconductor |
8 / 28 page TA2159F 2002-10-03 8 PIN No. Symbol Pin Name Function and Operation Remarks UART/3BUS UART 3BUS switching input When BUS dis = Low, inputs 3BUS selection signal. Because output is High at sleep mode, input High through pullup resistor. 3BUS = Inputs Low. UART = Inputs High. 12 TEL key TEL input key When BUS dis = High, this key is the TEL input key. Every time this key falls to Low level, pin 15 (TEL/RADIO) output is set to Low ® High ® Low, and soon. When TEL/RADIO = Low, turns off the radio; when High, turns on the radio. When not using the TEL key, leave the pin open. When SLEEP = Low, output is set to Low (pull-up off). 14 Beep Beep output Searches for the station when the UP-SEARCH key is pressed at no-transmission mode. If a station is not detected after a whole search or an automatic preset scan, outputs a beep. MONO/ST MONO /STREO control output Directly connected to pin 47 (LPF1) of the tuner block. Controls output and forced mono according to the BUS data. STREO = Input mode (open) MONO = Outputs Low. 15 TEL/RADIO TEL/RADIO status output When BUS dis = H, switches output from Low to High every pin 12 (TEL key) input. Radio = Outputs High. TEL = Outputs Low (radio off). 16 MUTE Muting output mode Output mode, normally used for muting control signal output. The signal is used as IF count ON/OFF signal in tuner block and MUTE signal. 17 TEST2 Test mode control input Input pin used for controlling TEST mode. “H” (high) level indicates TEST mode, while “L” (low) indicates normal operation. Since a pull-down resistor is built into the pin, at normal operation, leave the pin open or set it to Low. 16 VDD RIN2 17 VDD 15 14 12 |
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