mcf5282 Freescale Semiconductor, Inc, mcf5282 Datasheet - Page 421

• Manufacturer Part Number: mcf5282
• Manufacturer: Freescale Semiconductor, Inc

Chapter 23
UART Modules
23.1
This chapter describes the use of the three universal asynchronous receiver/transmitters (UARTs) and
includes programming examples.
23.1.1
The internal bus clock can clock each of the three independent UARTs, eliminating the need for an external
UART clock. As
Freescale Semiconductor
•
•
•
•
Serial communication channel
Programmable clock generation
Interrupt control logic and DMA request logic
Internal channel control logic
Transmit DMA Request
(to Interrupt Controller)
Receive DMA Request
Introduction
(To DMA Controller)
Overview
Interrupt Request
The designation n appears throughout this section to refer to registers or
signals associated with one of the three identical UART modules: UART0,
UART1, or UART2.
Figure 23-1
MCF5282 and MCF5216 ColdFire Microcontroller User’s Manual, Rev. 3
shows, each UART module interfaces directly to the CPU and consists of:
Figure 23-1. UART Block Diagram
Internal Channel
UART Registers
Interrupt Control
DMA Request
Control Logic
Logic
Logic
Internal Bus
NOTE
Communications
Programmable
Generation
Channel
Clock
Serial
UART
Internal Bus Clock (f
or External Clock (DTINn)
UCTSn
URTSn
URXDn
UTXDn
sys
)
23-1