Hardware manual

Atmel 8051 Microcontrollers Hardware Manual 2-17
Rev. 4316A–8051–01/04
Section 2
Common Features Description
2.1 Introduction This chapter presents a comprehensive description of the on-chip hardware features of
the Atmel 8051 microcontrollers. Included in this description are:
 The port drivers and how they function both as ports and, for Ports 0 and 2, in bus
operations
 The Timer/Counters
 The serial Interface
 The Interrupt System
 Reset
 The reduced Power Modes