Analog Set-Top Box 1990’s

16 bit

Microcontroller

Tuner

RF Input

Keypad

Display

IR Rcvr

IF/AGC

RF Modulator

RF Output

Control

Demod

Telephone

Dialer/Modem

Telephone

Return Path

RF

Mod

RF

Return Path

Graphics/

Audio

Controller

video switch

sync sep/gen

0.5-1Mbyte

DRAM

0.5-2 Mbyte

Flash/ROM

Video Out

L/R Audio Out

AC1Digital

Audio

Digital Audio

Linear/Switcher

Power Supply

I/O

Port

Expansion

Port

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