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MC13110A Datasheet(PDF) 12 Page - Motorola, Inc |
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MC13110A Datasheet(HTML) 12 Page - Motorola, Inc |
12 / 68 page ![]() MC13110A/B MC13111A/B 12 MOTOROLA ANALOG IC DEVICE DATA PIN FUNCTION DESCRIPTION (continued) Description Equivalent Internal Circuit (52 Pin QFP) Symbol/ Type Pin Description Equivalent Internal Circuit (52 Pin QFP) Symbol/ Type QFP–52 LQFP–48 8 9 10 9 10 11 Data EN Clk (Input) Data, EN, Clk 9, 10, 11 VCC Audio 240 PLL Vref 1.0 µA Microprocessor serial interface input pins are for programming various counters and control functions. The switching thresholds are referenced to PLL Vref and Gnd PLL. The inputs operate up to VCC. These pins have 1.0 µA internal pull–down currents. 11 12 Clk Out (Output) Clk Out 12 VCC Audio VCC Audio 1.0 k The microprocessor clock output is derived from the 2nd LO crystal oscillator and a programmable divider with divide ratios of 2 to 312.5. It can be used to drive a microprocessor and thereby reduce the number of crystals required in the system design. The driver has an internal resistor in series with the output which can be combined with an external capacitor to form a low pass filter to reduce radiated noise on the PCB. This output also functions as the output for the counter test modes. 1) For the MC13110A/B and MC13111A/B the Clk Out can be disabled via the MPU interface. 2) For the MC13110B and MC13111B this output is always active (on) (Note 2). 12 13 CD Out (I/O) CD Comparator CD Out 13 VCC Audio 240 PLL Vref Hardware Interrupt Dual function pin; 1) Carrier detect output (open collector with external 100 k Ω pull–up resistor. 2) Hardware interrupt input which can be used to “wake–up” from the Inactive Mode. – 14 BD1 Out 14 16 VCC Audio Low battery detect output #1 is an open collector with external pull–up resistor. 14 16 BD2 Out (Output) BD1 Out BD2 Out 14, 16 Low battery detect output #2 is an open collector with external pull–up resistor. 13 15 DA Out (Output) DA Out 15 VCC Audio VCC Audio 100 k Data amplifier output (open collector with internal 100 k Ω pull–up resistor). 15 17 Tx Out (Output) Tx Out 17 VCC Audio VB Tx Out is the Tx path audio output. Internally this pin has a low–pass filter circuitry with –3 dB bandwidth of 4.0 kHz. Tx gain and mute are programmable through the MPU interface. This pin is sensitive to load capacitance. |
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