
THE 8051 MICROCONTROLLER: THE PROGRAMMER’S PERSPECTIVE 19-5
19.1.1 | Other Members of the Family
Two members of the family which stand out (because of being different) are the 8052
and 8031. The latter, i.e., 8031 does not have internal ROM and so is frequently denoted
as a ‘ROM less’ 8051; it needs external ROM to burn the program designed for it. 8052
is different by having more RAM in it—128 bytes more and also an extra timer.
When you try to buy a chip of 8051, it is likely that you will not find such a part
number available. This is because 8051 has been given different numbers based on the
type of ROM inside; if the ROM is UV PROM, the v ...