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LC72148V Datasheet(PDF) 6 Page - Sanyo Semicon Device

No. de pieza LC72148V
Descripción Electrónicos  Electronic Tuning PLL Frequency Synthesizer for Car Stereo Systems
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Fabricante Electrónico  SANYO [Sanyo Semicon Device]
Página de inicio  https://www.sanyo-av.com/us/
Logo SANYO - Sanyo Semicon Device

LC72148V Datasheet(HTML) 6 Page - Sanyo Semicon Device

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No. 6974-6/21
LC72148V
Continued from preceding page.
Pin No.
Symbol
Type
Function
Pin circuit
• Input/output shared-function pins
• In output mode, the circuits are complementary outputs.
• The I/O direction is determined by I/O-4 and I/O-5 in the serial data.
When the data is 0: input port
When 1: output port
• When specified for use as input ports
The input pin states are transmitted from the DO pin to the controller
Input state = low : Data = 0
Input state = high : Data = 1
• When specified for use as output ports
The output states are determined by OUT4 and OUT5 in the serial data.
Data = 0 : low
Data = 1 : high
• These pins are set to function as input ports by the power-on reset.
I/O-4
I/O-5
9
8
General-purpose
I/O ports
• The OUT6 bit in the serial data is latched and output from O-6.
O-6
7
Output port
• The OUT7 bit in the serial data is latched and output from O-7.
• This pin outputs the 8 Hz clock time base signal when TBC is 1.
• This pin is set to the open state by the power-on reset.
O-7
6
Output port
• PLL charge pump output pins
When the frequency created by dividing the local oscillator signal
frequency by N is higher than the reference frequency, a high level is
output from the PD0 pin, and when lower, a low level is output. When the
frequencies match, PD0 goes to the high-impedance state.
• PD1 operates in a similar manner.
PD0
PD1
20
19
Charge pump
output
• HCTR is selected when CTS1 in the serial data input is set to 1.
— The input frequency range is 0.4 to 25 MHz
—The signal is passed through an internal divide-by-two circuit and
transmitted to a general-purpose counter. An integrating count can also
be performed.
—The result is output starting with the MSB of the general-purpose
counter from the DO pin.
— There are four counting time periods: 4, 8, 32, or 64 ms.
— See the item on the general-purpose counter for details.
• When H/I-6 in the serial data is set to 0
— This pin functions as an input port, and its state is output from the DO
output pin.
HCTR/I-6
14
General-purpose
counter
• LCTR is selected when CTS1 in the serial data input is set to 0.
• When CTS0 in the serial data input is set to 1 in the CTS1=0 state.
— The circuit operates in frequency measurement mode.
— The input frequency range is 10 to 500 kHz.
— The signal is transmitted directly to the general-purpose counter.
• When CTS0 in the serial data input is set to 0
— The circuit operates in period measurement mode.
— The input frequency range is 1 Hz to 20 kHz.
—The measurement period can be set to be either 1 period or 2 periods.
If 2-period measurement is selected, the input frequency range will be
2 Hz to 40 kHz.
—The result is output starting with the MSB of the general-purpose
counter from the DO pin.
— See the item on the general-purpose counter for details.
• When L/I-7 in the serial data input is set to 0.
—This pin functions as an input port, and its state is output from the DO
output pin.
LCTR/I-7
13
S
General-purpose
counter


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