M65850P/FP 查看數據表（PDF） - MITSUBISHI ELECTRIC

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M65850P/FP

DIGITAL ECHO(DIGITAL DELAY)

MITSUBISHI ELECTRIC  

M65850P/FP 50 PRELIMINARY DIGITAL ECHO(DIGITAL DELAY) Nsootmicee ;pTahraismiestnrioctliamfiitnsaalrsepseucbifijceacttioton.change.

MITSUBISHI SOUND PROCESSOR ICs

SERIES

KARAOKE

FUNCTION DESCRIPTION

(1) Delay time Td

The delay time can be calculated by the equation :

Td=8N / fck ( N=the number of memory bits=20480 )

When fck=1MHz ( fs=125kHz), Td can be set at 164ms.

« Reference »

The M65850P/FP adopts ADM ( Adaptive Delta Modulation ) system in A-D,D-A

converters.

The sampling frequency can be calculated by the following equation :

fs=clock frequency / 8 ( Hz )

For clock frequency ( fck )=1MHz, the calculated sampling frequency is :

fs=1MHz / 8 =125kHz

(2) Clock oscillator circuit

The M65850P incorporates a current control type clock

oscillator circuit in it, thus providing circuit configuration just by

connecting a resistor for current control to pin 13 ( FP:pin 14 )

CLOCK.

Fully internal clock supply prevents occurrence of undesired

radiation without affecting any external circuit.

Rc

The oscillator frequency is:

fck = 1 MHz. ( Rc=120kΩ )

Vcc

13*

* (FP:14)

Clock

oscillator

circuit

The resistor for current control can be calculated using the

following equation.

Rc

•

•

K/Clock

frequency

(fck)

[

Hz

]

K is the coefficient, and changes according to clock frequency

,as shown below.

Clock

frequency : fck

Delay Time

( ms )

15~30

31~100

101~200

Clock Frequency

( Hz )

11.0M~5.5M

5.3M~1.64M

1.62M~800K

K value

11

0.8 X 10

1.0 X 1011

1.2 X 1011

MITSUBISHI

ELECTRIC

Rc ( Ω )

7.5k~15k

18k~62k

75k~150k

( 6 / 11 )

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