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TA2159F Folha de dados(PDF) 9 Page - Toshiba Semiconductor |
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TA2159F Folha de dados(HTML) 9 Page - Toshiba Semiconductor |
9 / 28 page TA2159F 2002-10-03 9 PIN No. Symbol Pin Name Function and Operation Remarks 18 SLEEP Sleep input If SLEEP = Low while VDD is being applied, the device enters Ultra-Low Current Dissipation mode where memory only is backed up by stopping crystal oscillation, PLL, and the CPU. At that time, VDD can be dropped to 0.75 V. When VDD is less than 0.75 V, this function will be reset. The minimum frequency 87.5 MHz or 76 MHz will be set at transmission mode on power on. To restore from back-up state, set the pin from Low to High. Turn the radio on at the same time. 19 IF IN IF signal input IF signal input pin for the IF counter to count the IF signals of the FM band and to detect the automatic stop positon. The input frequency is between 0.3 to 12 MHz. A built-in input amp.and C coupling allow operation at low-level input. Note: The internal IF amp is operated whether the IF counter is ON or OFF, and the noise level will be increased. Toshiba recommend connect the pin to GND using the pin 7 (IF-NOISE) signal at normal operation. 13, 22 VDD 20, 35 GND Power-supply pins Power supply pins. Normally, VDD = 3.0 V is applied. 21 FM IN local oscillation signal input Direct division method. Input range: 5 to 8 MHz Note: In PLL OFF mode, input is at high impedance. 23 DO Phase comparator output PLL phase comparator output pin. Tri-state output. When programmable counter divided frequency output is higher than the reference frequency, High level is output; when lower, Low level is output; when they match, high impedance. When the radio is off, output Low is fixed. 19 VDD RfIN1 18 VDD 23 VDD 13, 22 20, 35 21 VDD RfIN1 |
Nº de peça semelhante - TA2159F |
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Descrição semelhante - TA2159F |
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