Circuit Board Reference Manual

MCF548x Reference Manual, Rev. 3
Freescale Semiconductor 26-1
Chapter 26
Programmable Serial Controller (PSC)
26.1 Introduction
This chapter describes the MCF548x programmable serial controller (PSC).
26.1.1 Block Diagram
A block diagram of the PSC/IrDA module is shown in Figure 26-1 below.
Figure 26-1. PSC/IrDA Block Diagram
26.1.2 Overview
The PSC/IrDA module provides asynchronous, synchronous, and IrDA 1.1 compliant receiver/transmitter
serial communications. Each receiver and transmitter contains a 512-byte FIFO to reduce interrupt
overhead.
The MCF548x contains four programmable serial controllers.
26.1.3 Features
The primary features of the PSC/IrDA module are as follows:
• Full duplex receiver and transmitter in all modes
• Seven operation modes (UART, three soft modem modes, and three IrDA modes)
• Two 512-byte FIFOs
26.1.4 Modes of Operation
The operation modes supported by the PSC/IrDA module are as follows.
• Universal asynchronous receiver transmitter (UART) mode
Soft
MIR
FIR
SIR
UART
Modem
Serial
MUX
Bus
Control
Registers
FIFOs
Modem
CODEC
CODEC
CODEC
Interface
Comm Bus
Control
Mux
Ports
IP Bus