* This specification are subject to be changed without notice.

EM92600/1A

DUAL PLL FOR 46/49 MHZ CORDLESS PHONE

2

4.23.1995

PIN DESCRIPTIONS

Symbol

Pin No.

Function

XTALO

O

This ouput generates reference frequency when it is connected to pin 16 with

external OSC of which frequency is 10.240MHz

MODE

I

Base/remote changing. Internal pull down.

V

DD

=base,V

SS

=remote.

SB

I

The standby pin is uses to save power when no transmit. Internal pull down.

High: transmit and receive active

Low: receive acts only

5K

O

The signal derived from the reference oscillator. 5KHz output.

FUNCTIONAL BLOCK DIAGRAM

XTAL0

5K

PDR

RIF

Reference

counter

divide by 2048

Lock

detector

phase

detector

Phase

detector

14 bits divide by N

receive counter

b27-b14

MODE

D3

SB

ROM 32*28

& decoder logic

14 bits divide by N

Transmit counter

XTAL1

LD

PDT

TIF

b13-b0

D2 D1 D0

EM92600A block diagram

XTAL0

5K

PDR

RIF

Reference

counter

divide by 2048

Lock

detector

phase

detector

Phase

detector

14 bits divide by N

receive counter

b27-b14

MODE

DI

CLK

EN

SB

ROM 32*28

& decoder logic

14 bits divide by N

Transmit counter

XTAL1

LD

PDT

TIF

b13-b0

4 bits

latch

4 bits

S/R

EM92601A block diagram