8-bit Microprocessors


998x

                                                                                                 9980A
Manufacturer Texas Instruments
Category single chip central processing unit
Introduction 1976
Technology

embedded version of 9900
40 pin package; three power supplies (-5V, +5V, +12V); uses an 8-bit bidirectional data bus, so that standard memory and I/O chips, developed for 8-bit microcomputers, are easily used in 9980A systems; internally the chip is still a 16-bit microprocessor, and the 9900 instruction set is preserved; addressing capability 16 Kbytes of memory; external clock input, with an on-chip clock generator circuit; on-chip 4-phase cloc generator; up to 16K Bytes of memory

Second source AMI
Peripherals see 9900
                                                                                                 9981
Manufacturer Texas Instruments
Category single chip central processing unit
Introduction

Examples






Package


Comment

 

Texas Instruments
TMS 9981 JDL
Texas Instruments
TMS 9981-X JDL
 40 pin CERDIP
gold top
 40 pin CERDIP
gold top
 - -

 

Technology

embedded version of 9900
40 pin package; 5V and +12V power supplies;  uses an 8-bit bidirectional data bus, so that standard memory and I/O chips, developed for 8-bit microcomputers, are easily used in 9981 systems; internally the chip is still a 16-bit microprocessor, and the 9900 instruction set is preserved; addressing capability 16 Kbytes of memory; uses a crystal to generate the timing; 

Second source -
Peripherals see 9900
                                                                                                 9985
  embedded version of 9900
 
                                                                                                 9989
 
                                                                                                 9995
Manufacturer Texas Instruments
Category single chip central processing unit
Introduction

Examples






Package


Comment

 

Texas Instruments
TMS 9995 JDL-12
 40 pin CERDIP
gold top
 -

 

Technology

embedded version of 9900

Second source -
Peripherals see 9900