SC9256 datasheet(5/24 Pages) SILAN

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Silan

Semiconductors

SC9256

HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD

REV: 1.0

2002.01.30.

(Continued)

Pin No.

Symbol

Pin name

Description

Circuit diagram

PERIOD

Period signal input

CLOCK

Clock signal input

5DATA

Serial data

input/output

Serial I/O ports. These pins transfer

data to and from the controller to set

divisions and dividing modes, and to

control the general-purpose counter

and general-purpose I/O ports.

Schmitt

input

DATA

VDD

Schmitt input

CLOCK,PERIOD

6OT-1

7OT-2

8OT-3

General-purpose

output ports

N channel open drain port pins, for

such uses as control signal output.

These pins are set to the OFF state

when power is turned on.

N-channel open drain

AMIN

FMIN

Programmable

counter input

These pins input FM and AM band

local oscillator signals by capacitor

coupling. FMIN and AMIN operate at

low amplitude.

VDD

I/O-

6/IFIN2

I/O-5

/IFIN1

General-purpose

I/O ports/General-

purpose

counter

frequency

measurement

input

General-purpose

I/O

port

input

/output pins. Can be switched for use

as input pins to measure general

purpose counter frequencies. The

frequency measurement function has

such

uses

measuring

inter-

mediate frequencies (IF).

These pins feature built-in amps.

Data are input by capacitor coupling.

FMIN and AMIN operate at low

amplitude.

(note) Pins are set for input when

power is turned on.

VDD

DO1

DO2/OT-4

Phase comparator

output

(General-

purpose

output

ports)

These pins are for phase comparator

tri-state output. DO1 and DO2 are

output in parallel.

VDD

GND

9VDD

Power supply pins

Applies 5.0V

±10%

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