LC7074 查看數據表（PDF） - SANYO -> Panasonic

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LC7074

Synchronous Error Correction IC for RDS Applications

SANYO -> Panasonic 

LC7074, 7074M

Pin Functions

Pin

I/O

VDD, VSS1

VSS2, VSS3

Internal equivalent circuit

Power supply

Function

Value at reset

OSC1

I

OSC2

O

Clock oscillator

Connect the external ceramic oscillator and capacitor at these pins.

CLOCK IN

I

DATA IN

I

CORR.SEL

I

CL.ED.SEL

I

D.S.CONTROL

I

RECEIVE

O

CORRECTION

O

ERROR

O

DATA START

O

RDS demodulation clock input

Connect to the clock output from the LA2230 series demodulation

IC.

RDS demodulation data input

Connect to the data output from the LA2230 series demodulation IC.

Error correction selection input

This pin selects whether the IC corrects errors in the RDS

demodulated data.

Input=0: No correction performed*

Input=1: Error correction performed

In modes where error correction is enabled, up to five error bits are

corrected for distances of 5 bits or less.

Serial data clock output polarity selection input

Input=0: Serial data output is valid on the rising edge of the output

clock. (Data output changes on the falling edge of the clock.)

Input=1: Serial data output is valid on the falling edge of the output

clock. (Data output changes on the rising edge of the clock.)

Block data start signal control input

Input=0: Output the DATA START signal for all blocks.

Input=1: Output the DATA START signal for only the second block.

RDS data reception in progress output

Outputs a low level while serial data is being output following

completion of synchronization detection. Outputs a high level at all

other times.

Open drain output

High level

(high impedance)

Error correction operation output

Outputs a low level when the serial data output data has been error

corrected, or could not be corrected. Outputs a high level (high

impedance) when correction is disabled.

Open drain output

High level

(high impedance)

Error output

Outputs a low level when there were errors in the input data and

those errors could not be corrected. Outputs a high level (high

impedance) when there were no errors or the errors were corrected.

Open drain output

High level

(high impedance)

Serial data output block data start signal

The output type is controlled by the D.S.CONTOL input.

Pull-up MOS transistor (CMOS) output

High level

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No.4789–5/17

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