2000 Jan 31

14

Philips Semiconductors

Preliminary specification

Integrated MPEG AVGD decoders

SAA7215; SAA7216; SAA7221

Notes

1. Pin type abbreviations: I = Input, O = Output, I/O = Input or Output, O/Z = high impedance Output and

S = Supply voltage.

3. Signal CPU_SEL(1) is used only after a global hardware reset is applied on external input line RESET for determining

the type of the microcontroller connected to SAA7215; SAA7216; SAA7221 and therefore apply the proper

communication protocol. This microcontroller type must be given by means of weak pull-up or pull-down externally

connected to CPU_SEL(1). During normal operation, the pin TTXRQ/CPU_SEL(1) is used for implementing the

Teletext Data Request protocol and must not be disturbed by the microcontroller type setting.

DATACK

203

O/Z

data acknowledge output; note 2

DS/TS

204

I

data strobe or transfer start input; note 2

DATA(0)

205

I/O

CPU data input or output (bit 0); note 2

DATA(1)

206

I/O

CPU data input or output (bit 1); note 2

DATA(2)

207

I/O

CPU data input or output (bit 2); note 2

DATA(3)

208

I/O

CPU data input or output (bit 3); note 2

SYMBOL

PIN

DESCRIPTION