PRELIMINARY

iii

CONTENTS

80296SA Commercial

CHMOS 16-bit Microcontroller

1.0

Product Overview ................................................................................................................ 1

2.0

Nomenclature Overview ...................................................................................................... 2

3.0

Pinout .................................................................................................................................. 3

4.0

Signals ................................................................................................................................ 6

5.0

Address Map ..................................................................................................................... 13

6.0

Electrical Characteristics ................................................................................................... 14

6.1

DC Characteristics........................................................................................................ 14

6.2

AC Characteristics........................................................................................................ 18

6.2.1

Relationship of XTAL1 to CLKOUT ....................................................................... 18

6.2.2

Explanation of AC Symbols ................................................................................... 19

6.2.3

AC Characteristics — Multiplexed Bus Mode ........................................................ 20

6.2.3.1

System Bus Timings, Multiplexed Bus ...................................................... 22

6.2.3.2

READY Timing, Multiplexed Bus ............................................................... 23

6.2.4

AC Characteristics — Demultiplexed Bus Mode ................................................... 24

6.2.4.1

System Bus Timings, Demultiplexed Bus .................................................. 26

6.2.4.2

READY Timing, Demultiplexed Bus .......................................................... 27

6.2.4.3

80296SA Deferred Bus Timing Mode ........................................................ 28

6.2.5

HOLD#, HLDA# Timings ....................................................................................... 29

6.2.6

AC Characteristics — Serial Port, Synchronous Mode 0 ...................................... 30

6.2.7

External Clock Drive .............................................................................................. 31

7.0

Thermal Characteristics .................................................................................................... 33

8.0

80296SA Errata................................................................................................................. 33

9.0

Datasheet Revision History ............................................................................................... 33

FIGURES

1.

80296SA Block Diagram ......................................................................................................1

2.

The 80296SA Family Nomenclature ....................................................................................2

3.

80296SA 100-pin QFP Package ..........................................................................................3

4.

I

5.

Effect of Clock Mode on CLKOUT...................................................................................... 18

6.

System Bus Timings, Multiplexed Bus Mode ..................................................................... 22

7.

Example READY Timings at 50 MHz, Multiplexed Bus, BUSCON

x = 1 Wait State........... 23

8.

System Bus Timings, Demultiplexed Bus Mode................................................................. 26

9.

Example READY Timings at 50 MHz, Demultiplexed Bus, BUSCON

x = 1 Wait State ...... 27

10.

Deferred Bus Mode Timing Diagram.................................................................................. 28

11.

HOLD#, HLDA# Timing Diagram ....................................................................................... 29

12.

Serial Port Waveform — Synchronous Mode 0.................................................................. 30

13.

External Clock Drive Waveforms........................................................................................ 31

14.

AC Testing Input and Output Waveforms During 5.0 Volt Testing ..................................... 32

15.

Float Waveforms During 5.0 Volt Testing........................................................................... 32