EZ-USB Datasheet, PDF (278/334 Pages) Cypress Semiconductor – The EZ-USB USB Integrated Circuit

A.5 803x/805x Feature Comparison
Table A-1. provides a feature-by-feature comparison of the 8051 core and several common
803x/805x configurations.
Table A-1. Feature Summary of 8051 Core and Common 803x/805x Configurations
Feature
8031
Intel
8051
80C32
80C52
Dallas
DS80C320
Anchor
8051
Clocks per instruction cycle
12
12
12
12
Program / Data Memory
-
4 KB
-
8 KB
ROM
ROM
Internal RAM
128 bytes 128 bytes 256 bytes 256 bytes
Data Pointers
1
1
1
1
Serial Ports
1
1
1
1
16-bit Timers
2
2
3
3
Interrupt sources (total of int.
5
5
6
6
and ext.)
Stretch memory cycles
no
no
no
no
4
-
256 bytes
2
2
3
13
yes
4
8 K RAM
256 bytes
2
2
3
13
yes
A-4
Appendix A: 8051 Introduction
EZ-USB TRM v1.9