Datasheet

UART Modules

MOTOROLA MCF5206e USER’S MANUAL 12-1

SECTION 12

UART MODULES

The MCF5206e contains two universal asynchronous/synchronous receiver/transmitters

(UARTs) that act independently. Each UART is clocked by the system clock, which

eliminates the need for an external crystal. This section applies to both UARTs, which are

identical. Refer to Section 12.4 for addressing differences.

Each UART module, shown in Figure 12-1, consists of the following major functional

areas:

• Serial Communication Channel

• 16-Bit Baud-RateTimer

• Internal Channel Control Logic

• Interrupt Control Logic

Figure 12-1. UART Block Diagram

INTERNAL CHANNEL

CONTROL LOGIC

INTERRUPT CONTROL

LOGIC

16-BIT TIMER

FOR BAUD RATE GENERATION

SERIAL COMMUNICATION

CHANNEL

CTS

RTS

RXD

TXD

SYSTEM CLOCK

TIN (EXT CLK)

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Freescale Semiconductor, Inc.

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